./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test10-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test10-1.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 b06fba6fbf61d996c1af57497d908c6dba492febf0212a36ee7b28f5806d365e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 16:12:47,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 16:12:47,134 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 16:12:47,163 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 16:12:47,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 16:12:47,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 16:12:47,165 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 16:12:47,167 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 16:12:47,168 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 16:12:47,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 16:12:47,169 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 16:12:47,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 16:12:47,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 16:12:47,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 16:12:47,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 16:12:47,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 16:12:47,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 16:12:47,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 16:12:47,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 16:12:47,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 16:12:47,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 16:12:47,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 16:12:47,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 16:12:47,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 16:12:47,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 16:12:47,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 16:12:47,181 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 16:12:47,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 16:12:47,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 16:12:47,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 16:12:47,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 16:12:47,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 16:12:47,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 16:12:47,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 16:12:47,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 16:12:47,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 16:12:47,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 16:12:47,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 16:12:47,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 16:12:47,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 16:12:47,186 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 16:12:47,188 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 16:12:47,205 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 16:12:47,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 16:12:47,205 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 16:12:47,205 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 16:12:47,206 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 16:12:47,206 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 16:12:47,207 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 16:12:47,207 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 16:12:47,207 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 16:12:47,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 16:12:47,207 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 16:12:47,207 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 16:12:47,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 16:12:47,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 16:12:47,208 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 16:12:47,208 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 16:12:47,208 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 16:12:47,208 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 16:12:47,208 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 16:12:47,209 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 16:12:47,209 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 16:12:47,209 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 16:12:47,209 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 16:12:47,209 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 16:12:47,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:12:47,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 16:12:47,210 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 16:12:47,210 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 16:12:47,210 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 16:12:47,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 16:12:47,210 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 16:12:47,210 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 16:12:47,211 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 16:12:47,211 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 16:12:47,211 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b06fba6fbf61d996c1af57497d908c6dba492febf0212a36ee7b28f5806d365e [2021-12-22 16:12:47,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 16:12:47,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 16:12:47,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 16:12:47,406 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 16:12:47,406 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 16:12:47,407 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test10-1.i [2021-12-22 16:12:47,469 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00dd45192/0bb5eafba9654b7cb17cb9515d073307/FLAG6a129fcf7 [2021-12-22 16:12:47,930 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 16:12:47,931 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test10-1.i [2021-12-22 16:12:47,952 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00dd45192/0bb5eafba9654b7cb17cb9515d073307/FLAG6a129fcf7 [2021-12-22 16:12:47,968 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00dd45192/0bb5eafba9654b7cb17cb9515d073307 [2021-12-22 16:12:47,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 16:12:47,972 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 16:12:47,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 16:12:47,974 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 16:12:47,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 16:12:47,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:12:47" (1/1) ... [2021-12-22 16:12:47,977 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dc6d298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:12:47, skipping insertion in model container [2021-12-22 16:12:47,977 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:12:47" (1/1) ... [2021-12-22 16:12:47,983 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 16:12:48,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 16:12:48,500 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_JEN_test10-1.i[33022,33035] [2021-12-22 16:12:48,650 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:12:48,656 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 16:12:48,674 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_JEN_test10-1.i[33022,33035] [2021-12-22 16:12:48,749 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:12:48,774 INFO L208 MainTranslator]: Completed translation [2021-12-22 16:12:48,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:12:48 WrapperNode [2021-12-22 16:12:48,774 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 16:12:48,775 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 16:12:48,775 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 16:12:48,775 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 16:12:48,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:12:48" (1/1) ... [2021-12-22 16:12:48,818 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:12:48" (1/1) ... [2021-12-22 16:12:48,898 INFO L137 Inliner]: procedures = 177, calls = 524, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2175 [2021-12-22 16:12:48,899 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 16:12:48,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 16:12:48,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 16:12:48,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 16:12:48,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:12:48" (1/1) ... [2021-12-22 16:12:48,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:12:48" (1/1) ... [2021-12-22 16:12:48,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:12:48" (1/1) ... [2021-12-22 16:12:48,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:12:48" (1/1) ... [2021-12-22 16:12:48,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:12:48" (1/1) ... [2021-12-22 16:12:49,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:12:48" (1/1) ... [2021-12-22 16:12:49,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:12:48" (1/1) ... [2021-12-22 16:12:49,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 16:12:49,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 16:12:49,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 16:12:49,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 16:12:49,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:12:48" (1/1) ... [2021-12-22 16:12:49,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:12:49,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:12:49,076 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 16:12:49,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 16:12:49,102 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-12-22 16:12:49,102 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-12-22 16:12:49,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 16:12:49,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-22 16:12:49,103 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-22 16:12:49,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 16:12:49,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-22 16:12:49,103 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-22 16:12:49,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 16:12:49,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 16:12:49,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 16:12:49,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 16:12:49,103 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-22 16:12:49,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 16:12:49,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 16:12:49,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 16:12:49,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 16:12:49,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 16:12:49,388 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 16:12:49,390 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 16:12:50,436 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 16:12:50,451 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 16:12:50,452 INFO L299 CfgBuilder]: Removed 151 assume(true) statements. [2021-12-22 16:12:50,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:12:50 BoogieIcfgContainer [2021-12-22 16:12:50,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 16:12:50,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 16:12:50,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 16:12:50,466 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 16:12:50,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:12:47" (1/3) ... [2021-12-22 16:12:50,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f9fb2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:12:50, skipping insertion in model container [2021-12-22 16:12:50,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:12:48" (2/3) ... [2021-12-22 16:12:50,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f9fb2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:12:50, skipping insertion in model container [2021-12-22 16:12:50,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:12:50" (3/3) ... [2021-12-22 16:12:50,469 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_JEN_test10-1.i [2021-12-22 16:12:50,476 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 16:12:50,476 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 16:12:50,519 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 16:12:50,534 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 16:12:50,534 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 16:12:50,558 INFO L276 IsEmpty]: Start isEmpty. Operand has 428 states, 409 states have (on average 1.7114914425427872) internal successors, (700), 414 states have internal predecessors, (700), 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) [2021-12-22 16:12:50,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 16:12:50,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:12:50,563 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:12:50,564 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:12:50,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:12:50,567 INFO L85 PathProgramCache]: Analyzing trace with hash -982002177, now seen corresponding path program 1 times [2021-12-22 16:12:50,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:12:50,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053358115] [2021-12-22 16:12:50,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:12:50,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:12:50,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:12:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:12:50,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:12:50,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053358115] [2021-12-22 16:12:50,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053358115] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:12:50,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:12:50,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:12:50,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516674424] [2021-12-22 16:12:50,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:12:50,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 16:12:50,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:12:50,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 16:12:50,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 16:12:50,735 INFO L87 Difference]: Start difference. First operand has 428 states, 409 states have (on average 1.7114914425427872) internal successors, (700), 414 states have internal predecessors, (700), 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) [2021-12-22 16:12:50,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:12:50,780 INFO L93 Difference]: Finished difference Result 854 states and 1462 transitions. [2021-12-22 16:12:50,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 16:12:50,782 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 [2021-12-22 16:12:50,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:12:50,793 INFO L225 Difference]: With dead ends: 854 [2021-12-22 16:12:50,793 INFO L226 Difference]: Without dead ends: 424 [2021-12-22 16:12:50,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 16:12:50,799 INFO L933 BasicCegarLoop]: 569 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, 569 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:12:50,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:12:50,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-12-22 16:12:50,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 424. [2021-12-22 16:12:50,870 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) [2021-12-22 16:12:50,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 565 transitions. [2021-12-22 16:12:50,876 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 565 transitions. Word has length 13 [2021-12-22 16:12:50,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:12:50,877 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 565 transitions. [2021-12-22 16:12:50,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:12:50,877 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 565 transitions. [2021-12-22 16:12:50,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 16:12:50,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:12:50,884 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:12:50,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 16:12:50,885 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:12:50,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:12:50,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1194795813, now seen corresponding path program 1 times [2021-12-22 16:12:50,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:12:50,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861674213] [2021-12-22 16:12:50,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:12:50,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:12:50,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:12:51,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:12:51,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:12:51,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861674213] [2021-12-22 16:12:51,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861674213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:12:51,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:12:51,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:12:51,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863511892] [2021-12-22 16:12:51,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:12:51,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:12:51,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:12:51,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:12:51,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:12:51,026 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) [2021-12-22 16:12:51,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:12:51,475 INFO L93 Difference]: Finished difference Result 745 states and 997 transitions. [2021-12-22 16:12:51,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:12:51,477 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 [2021-12-22 16:12:51,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:12:51,479 INFO L225 Difference]: With dead ends: 745 [2021-12-22 16:12:51,479 INFO L226 Difference]: Without dead ends: 499 [2021-12-22 16:12:51,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:12:51,480 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 96 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1479 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 16:12:51,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1479 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 16:12:51,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-12-22 16:12:51,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 426. [2021-12-22 16:12:51,505 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) [2021-12-22 16:12:51,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 567 transitions. [2021-12-22 16:12:51,508 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 567 transitions. Word has length 48 [2021-12-22 16:12:51,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:12:51,509 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 567 transitions. [2021-12-22 16:12:51,513 INFO L471 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) [2021-12-22 16:12:51,513 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 567 transitions. [2021-12-22 16:12:51,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-22 16:12:51,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:12:51,518 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:12:51,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 16:12:51,534 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:12:51,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:12:51,534 INFO L85 PathProgramCache]: Analyzing trace with hash 834821079, now seen corresponding path program 1 times [2021-12-22 16:12:51,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:12:51,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562374092] [2021-12-22 16:12:51,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:12:51,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:12:51,639 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:12:51,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [793971698] [2021-12-22 16:12:51,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:12:51,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:12:51,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:12:51,650 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:12:51,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 16:12:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:12:52,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 1668 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 16:12:52,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:12:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:12:52,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:12:52,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:12:52,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562374092] [2021-12-22 16:12:52,512 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:12:52,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793971698] [2021-12-22 16:12:52,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793971698] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:12:52,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:12:52,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:12:52,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836120504] [2021-12-22 16:12:52,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:12:52,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:12:52,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:12:52,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:12:52,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:12:52,527 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) [2021-12-22 16:12:52,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:12:52,572 INFO L93 Difference]: Finished difference Result 869 states and 1161 transitions. [2021-12-22 16:12:52,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:12:52,573 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 [2021-12-22 16:12:52,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:12:52,575 INFO L225 Difference]: With dead ends: 869 [2021-12-22 16:12:52,575 INFO L226 Difference]: Without dead ends: 447 [2021-12-22 16:12:52,576 INFO L932 BasicCegarLoop]: 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 [2021-12-22 16:12:52,577 INFO L933 BasicCegarLoop]: 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 [2021-12-22 16:12:52,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1075 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:12:52,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-12-22 16:12:52,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 446. [2021-12-22 16:12:52,609 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) [2021-12-22 16:12:52,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 587 transitions. [2021-12-22 16:12:52,614 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 587 transitions. Word has length 101 [2021-12-22 16:12:52,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:12:52,614 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 587 transitions. [2021-12-22 16:12:52,614 INFO L471 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) [2021-12-22 16:12:52,617 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 587 transitions. [2021-12-22 16:12:52,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-22 16:12:52,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:12:52,621 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:12:52,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 16:12:52,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:12:52,836 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:12:52,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:12:52,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1892659157, now seen corresponding path program 1 times [2021-12-22 16:12:52,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:12:52,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229481919] [2021-12-22 16:12:52,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:12:52,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:12:52,913 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:12:52,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [697701982] [2021-12-22 16:12:52,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:12:52,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:12:52,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:12:52,915 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:12:52,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 16:12:53,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:12:53,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 1670 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 16:12:53,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:12:53,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 16:12:53,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:12:53,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:12:53,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229481919] [2021-12-22 16:12:53,647 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:12:53,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697701982] [2021-12-22 16:12:53,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697701982] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:12:53,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:12:53,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:12:53,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847062837] [2021-12-22 16:12:53,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:12:53,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:12:53,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:12:53,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:12:53,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:12:53,652 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) [2021-12-22 16:12:53,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:12:53,703 INFO L93 Difference]: Finished difference Result 701 states and 934 transitions. [2021-12-22 16:12:53,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:12:53,704 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 [2021-12-22 16:12:53,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:12:53,706 INFO L225 Difference]: With dead ends: 701 [2021-12-22 16:12:53,707 INFO L226 Difference]: Without dead ends: 467 [2021-12-22 16:12:53,707 INFO L932 BasicCegarLoop]: 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 [2021-12-22 16:12:53,709 INFO L933 BasicCegarLoop]: 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 [2021-12-22 16:12:53,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1075 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:12:53,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-12-22 16:12:53,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 466. [2021-12-22 16:12:53,747 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) [2021-12-22 16:12:53,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 607 transitions. [2021-12-22 16:12:53,749 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 607 transitions. Word has length 101 [2021-12-22 16:12:53,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:12:53,750 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 607 transitions. [2021-12-22 16:12:53,750 INFO L471 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) [2021-12-22 16:12:53,750 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 607 transitions. [2021-12-22 16:12:53,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-22 16:12:53,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:12:53,753 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:12:53,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-22 16:12:53,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-22 16:12:53,968 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:12:53,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:12:53,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1673804439, now seen corresponding path program 1 times [2021-12-22 16:12:53,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:12:53,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524170948] [2021-12-22 16:12:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:12:53,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:12:54,038 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:12:54,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1795181566] [2021-12-22 16:12:54,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:12:54,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:12:54,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:12:54,040 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:12:54,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 16:12:54,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:12:54,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 1672 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 16:12:54,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:12:54,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:12:54,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:12:54,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:12:54,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524170948] [2021-12-22 16:12:54,773 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:12:54,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795181566] [2021-12-22 16:12:54,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795181566] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:12:54,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:12:54,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:12:54,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125088036] [2021-12-22 16:12:54,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:12:54,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:12:54,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:12:54,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:12:54,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:12:54,776 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) [2021-12-22 16:12:54,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:12:54,833 INFO L93 Difference]: Finished difference Result 1004 states and 1314 transitions. [2021-12-22 16:12:54,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:12:54,833 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 [2021-12-22 16:12:54,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:12:54,835 INFO L225 Difference]: With dead ends: 1004 [2021-12-22 16:12:54,835 INFO L226 Difference]: Without dead ends: 542 [2021-12-22 16:12:54,836 INFO L932 BasicCegarLoop]: 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 [2021-12-22 16:12:54,837 INFO L933 BasicCegarLoop]: 628 mSDtfsCounter, 506 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1402 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 [2021-12-22 16:12:54,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 1402 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:12:54,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-12-22 16:12:54,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 452. [2021-12-22 16:12:54,846 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) [2021-12-22 16:12:54,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 586 transitions. [2021-12-22 16:12:54,847 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 586 transitions. Word has length 101 [2021-12-22 16:12:54,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:12:54,848 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 586 transitions. [2021-12-22 16:12:54,848 INFO L471 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) [2021-12-22 16:12:54,848 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 586 transitions. [2021-12-22 16:12:54,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-22 16:12:54,849 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:12:54,849 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:12:54,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 16:12:55,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:12:55,086 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:12:55,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:12:55,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1567366363, now seen corresponding path program 1 times [2021-12-22 16:12:55,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:12:55,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905082354] [2021-12-22 16:12:55,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:12:55,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:12:55,171 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:12:55,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922909635] [2021-12-22 16:12:55,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:12:55,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:12:55,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:12:55,188 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:12:55,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 16:12:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:12:55,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 1658 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 16:12:55,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:12:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 16:12:56,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:12:56,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:12:56,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905082354] [2021-12-22 16:12:56,021 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:12:56,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922909635] [2021-12-22 16:12:56,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922909635] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:12:56,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:12:56,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:12:56,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99374187] [2021-12-22 16:12:56,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:12:56,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:12:56,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:12:56,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:12:56,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:12:56,023 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) [2021-12-22 16:12:56,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:12:56,075 INFO L93 Difference]: Finished difference Result 675 states and 882 transitions. [2021-12-22 16:12:56,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:12:56,076 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 [2021-12-22 16:12:56,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:12:56,077 INFO L225 Difference]: With dead ends: 675 [2021-12-22 16:12:56,078 INFO L226 Difference]: Without dead ends: 439 [2021-12-22 16:12:56,078 INFO L932 BasicCegarLoop]: 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 [2021-12-22 16:12:56,079 INFO L933 BasicCegarLoop]: 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 [2021-12-22 16:12:56,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 1308 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:12:56,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-12-22 16:12:56,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 438. [2021-12-22 16:12:56,087 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) [2021-12-22 16:12:56,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 565 transitions. [2021-12-22 16:12:56,088 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 565 transitions. Word has length 101 [2021-12-22 16:12:56,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:12:56,089 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 565 transitions. [2021-12-22 16:12:56,089 INFO L471 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) [2021-12-22 16:12:56,089 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 565 transitions. [2021-12-22 16:12:56,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-22 16:12:56,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:12:56,090 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:12:56,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 16:12:56,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:12:56,314 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:12:56,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:12:56,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1090150057, now seen corresponding path program 1 times [2021-12-22 16:12:56,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:12:56,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885300135] [2021-12-22 16:12:56,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:12:56,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:12:56,384 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:12:56,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852283519] [2021-12-22 16:12:56,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:12:56,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:12:56,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:12:56,386 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:12:56,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 16:12:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:12:57,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 1644 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 16:12:57,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:12:57,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:12:57,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:12:57,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:12:57,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885300135] [2021-12-22 16:12:57,355 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:12:57,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852283519] [2021-12-22 16:12:57,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852283519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:12:57,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:12:57,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:12:57,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742602462] [2021-12-22 16:12:57,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:12:57,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:12:57,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:12:57,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:12:57,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:12:57,357 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) [2021-12-22 16:12:57,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:12:57,404 INFO L93 Difference]: Finished difference Result 1102 states and 1424 transitions. [2021-12-22 16:12:57,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:12:57,404 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 [2021-12-22 16:12:57,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:12:57,406 INFO L225 Difference]: With dead ends: 1102 [2021-12-22 16:12:57,407 INFO L226 Difference]: Without dead ends: 668 [2021-12-22 16:12:57,407 INFO L932 BasicCegarLoop]: 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 [2021-12-22 16:12:57,408 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 249 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:12:57,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 1129 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:12:57,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-12-22 16:12:57,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 664. [2021-12-22 16:12:57,420 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) [2021-12-22 16:12:57,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 857 transitions. [2021-12-22 16:12:57,422 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 857 transitions. Word has length 101 [2021-12-22 16:12:57,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:12:57,422 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 857 transitions. [2021-12-22 16:12:57,422 INFO L471 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) [2021-12-22 16:12:57,422 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 857 transitions. [2021-12-22 16:12:57,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-22 16:12:57,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:12:57,423 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:12:57,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-22 16:12:57,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:12:57,656 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:12:57,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:12:57,657 INFO L85 PathProgramCache]: Analyzing trace with hash 915182649, now seen corresponding path program 1 times [2021-12-22 16:12:57,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:12:57,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821555538] [2021-12-22 16:12:57,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:12:57,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:12:57,693 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:12:57,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191702642] [2021-12-22 16:12:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:12:57,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:12:57,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:12:57,712 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:12:57,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 16:12:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:12:58,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 16:12:58,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:12:58,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 16:12:58,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:12:58,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 16:12:58,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 16:12:58,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:12:58,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:12:58,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821555538] [2021-12-22 16:12:58,561 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:12:58,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191702642] [2021-12-22 16:12:58,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191702642] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:12:58,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:12:58,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 16:12:58,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409576449] [2021-12-22 16:12:58,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:12:58,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:12:58,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:12:58,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:12:58,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:12:58,563 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) [2021-12-22 16:12:59,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:12:59,245 INFO L93 Difference]: Finished difference Result 1238 states and 1596 transitions. [2021-12-22 16:12:59,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:12:59,246 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 [2021-12-22 16:12:59,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:12:59,248 INFO L225 Difference]: With dead ends: 1238 [2021-12-22 16:12:59,248 INFO L226 Difference]: Without dead ends: 664 [2021-12-22 16:12:59,249 INFO L932 BasicCegarLoop]: 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 [2021-12-22 16:12:59,249 INFO L933 BasicCegarLoop]: 528 mSDtfsCounter, 96 mSDsluCounter, 1329 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1857 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 16:12:59,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1857 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 16:12:59,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-12-22 16:12:59,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 664. [2021-12-22 16:12:59,261 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) [2021-12-22 16:12:59,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 856 transitions. [2021-12-22 16:12:59,263 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 856 transitions. Word has length 116 [2021-12-22 16:12:59,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:12:59,263 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 856 transitions. [2021-12-22 16:12:59,263 INFO L471 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) [2021-12-22 16:12:59,263 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 856 transitions. [2021-12-22 16:12:59,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-22 16:12:59,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:12:59,265 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:12:59,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 16:12:59,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:12:59,480 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:12:59,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:12:59,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1196561724, now seen corresponding path program 1 times [2021-12-22 16:12:59,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:12:59,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113955424] [2021-12-22 16:12:59,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:12:59,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:12:59,561 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:12:59,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615929760] [2021-12-22 16:12:59,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:12:59,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:12:59,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:12:59,578 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:12:59,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 16:13:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:13:00,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 2220 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 16:13:00,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:13:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 16:13:00,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:13:00,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:13:00,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113955424] [2021-12-22 16:13:00,803 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:13:00,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615929760] [2021-12-22 16:13:00,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615929760] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:13:00,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:13:00,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:13:00,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344781653] [2021-12-22 16:13:00,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:13:00,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:13:00,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:13:00,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:13:00,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:13:00,805 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) [2021-12-22 16:13:00,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:13:00,863 INFO L93 Difference]: Finished difference Result 1352 states and 1753 transitions. [2021-12-22 16:13:00,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:13:00,864 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 [2021-12-22 16:13:00,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:13:00,866 INFO L225 Difference]: With dead ends: 1352 [2021-12-22 16:13:00,866 INFO L226 Difference]: Without dead ends: 706 [2021-12-22 16:13:00,868 INFO L932 BasicCegarLoop]: 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 [2021-12-22 16:13:00,868 INFO L933 BasicCegarLoop]: 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 [2021-12-22 16:13:00,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1047 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:13:00,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-12-22 16:13:00,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 704. [2021-12-22 16:13:00,881 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) [2021-12-22 16:13:00,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 896 transitions. [2021-12-22 16:13:00,883 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 896 transitions. Word has length 163 [2021-12-22 16:13:00,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:13:00,883 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 896 transitions. [2021-12-22 16:13:00,884 INFO L471 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) [2021-12-22 16:13:00,884 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 896 transitions. [2021-12-22 16:13:00,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-22 16:13:00,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:13:00,885 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:13:00,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-22 16:13:01,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:13:01,100 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:13:01,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:13:01,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1167279938, now seen corresponding path program 1 times [2021-12-22 16:13:01,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:13:01,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147340301] [2021-12-22 16:13:01,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:13:01,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:13:01,187 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:13:01,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1352814528] [2021-12-22 16:13:01,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:13:01,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:13:01,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:13:01,201 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:13:01,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 16:13:02,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:13:02,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 2222 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 16:13:02,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:13:02,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 16:13:02,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:13:02,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:13:02,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147340301] [2021-12-22 16:13:02,566 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:13:02,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352814528] [2021-12-22 16:13:02,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352814528] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:13:02,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:13:02,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:13:02,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282202685] [2021-12-22 16:13:02,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:13:02,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:13:02,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:13:02,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:13:02,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:13:02,567 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) [2021-12-22 16:13:02,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:13:02,624 INFO L93 Difference]: Finished difference Result 1346 states and 1718 transitions. [2021-12-22 16:13:02,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:13:02,632 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 [2021-12-22 16:13:02,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:13:02,636 INFO L225 Difference]: With dead ends: 1346 [2021-12-22 16:13:02,636 INFO L226 Difference]: Without dead ends: 678 [2021-12-22 16:13:02,637 INFO L932 BasicCegarLoop]: 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 [2021-12-22 16:13:02,637 INFO L933 BasicCegarLoop]: 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 [2021-12-22 16:13:02,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 1099 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:13:02,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-12-22 16:13:02,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 676. [2021-12-22 16:13:02,650 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) [2021-12-22 16:13:02,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 854 transitions. [2021-12-22 16:13:02,652 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 854 transitions. Word has length 163 [2021-12-22 16:13:02,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:13:02,653 INFO L470 AbstractCegarLoop]: Abstraction has 676 states and 854 transitions. [2021-12-22 16:13:02,653 INFO L471 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) [2021-12-22 16:13:02,653 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 854 transitions. [2021-12-22 16:13:02,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-22 16:13:02,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:13:02,655 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:13:02,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 16:13:02,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-22 16:13:02,872 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:13:02,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:13:02,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1015565136, now seen corresponding path program 1 times [2021-12-22 16:13:02,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:13:02,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998418209] [2021-12-22 16:13:02,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:13:02,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:13:02,980 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:13:02,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16758836] [2021-12-22 16:13:02,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:13:02,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:13:02,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:13:02,982 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:13:02,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 16:13:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:13:04,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 2208 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 16:13:04,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:13:04,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 16:13:04,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:13:04,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:13:04,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998418209] [2021-12-22 16:13:04,342 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:13:04,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16758836] [2021-12-22 16:13:04,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16758836] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:13:04,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:13:04,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:13:04,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389415995] [2021-12-22 16:13:04,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:13:04,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:13:04,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:13:04,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:13:04,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:13:04,344 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) [2021-12-22 16:13:04,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:13:04,445 INFO L93 Difference]: Finished difference Result 1533 states and 1962 transitions. [2021-12-22 16:13:04,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:13:04,446 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 [2021-12-22 16:13:04,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:13:04,449 INFO L225 Difference]: With dead ends: 1533 [2021-12-22 16:13:04,449 INFO L226 Difference]: Without dead ends: 915 [2021-12-22 16:13:04,450 INFO L932 BasicCegarLoop]: 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 [2021-12-22 16:13:04,451 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 220 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:13:04,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 1064 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:13:04,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-12-22 16:13:04,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 813. [2021-12-22 16:13:04,466 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) [2021-12-22 16:13:04,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1036 transitions. [2021-12-22 16:13:04,468 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1036 transitions. Word has length 163 [2021-12-22 16:13:04,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:13:04,468 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 1036 transitions. [2021-12-22 16:13:04,468 INFO L471 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) [2021-12-22 16:13:04,468 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1036 transitions. [2021-12-22 16:13:04,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-22 16:13:04,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:13:04,470 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:13:04,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 16:13:04,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:13:04,676 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:13:04,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:13:04,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1315037683, now seen corresponding path program 1 times [2021-12-22 16:13:04,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:13:04,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500011141] [2021-12-22 16:13:04,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:13:04,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:13:04,736 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:13:04,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1622691210] [2021-12-22 16:13:04,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:13:04,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:13:04,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:13:04,764 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:13:04,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 16:13:05,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:13:05,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 1345 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 16:13:05,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:13:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 16:13:06,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:13:06,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:13:06,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500011141] [2021-12-22 16:13:06,133 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:13:06,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622691210] [2021-12-22 16:13:06,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622691210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:13:06,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:13:06,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:13:06,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429633837] [2021-12-22 16:13:06,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:13:06,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:13:06,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:13:06,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:13:06,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:13:06,136 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) [2021-12-22 16:13:06,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:13:06,471 INFO L93 Difference]: Finished difference Result 1342 states and 1716 transitions. [2021-12-22 16:13:06,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:13:06,472 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 [2021-12-22 16:13:06,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:13:06,476 INFO L225 Difference]: With dead ends: 1342 [2021-12-22 16:13:06,477 INFO L226 Difference]: Without dead ends: 665 [2021-12-22 16:13:06,478 INFO L932 BasicCegarLoop]: 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 [2021-12-22 16:13:06,479 INFO L933 BasicCegarLoop]: 520 mSDtfsCounter, 835 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 16:13:06,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 644 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 16:13:06,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-12-22 16:13:06,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 665. [2021-12-22 16:13:06,496 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) [2021-12-22 16:13:06,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 836 transitions. [2021-12-22 16:13:06,499 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 836 transitions. Word has length 178 [2021-12-22 16:13:06,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:13:06,499 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 836 transitions. [2021-12-22 16:13:06,500 INFO L471 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) [2021-12-22 16:13:06,500 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 836 transitions. [2021-12-22 16:13:06,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-22 16:13:06,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:13:06,502 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:13:06,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 16:13:06,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-22 16:13:06,728 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:13:06,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:13:06,728 INFO L85 PathProgramCache]: Analyzing trace with hash -122605024, now seen corresponding path program 1 times [2021-12-22 16:13:06,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:13:06,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376914653] [2021-12-22 16:13:06,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:13:06,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:13:06,855 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:13:06,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667287294] [2021-12-22 16:13:06,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:13:06,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:13:06,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:13:06,872 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:13:06,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 16:13:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:13:08,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 1370 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 16:13:08,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:13:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 16:13:08,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:13:08,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:13:08,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376914653] [2021-12-22 16:13:08,304 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:13:08,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667287294] [2021-12-22 16:13:08,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667287294] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:13:08,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:13:08,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:13:08,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746513937] [2021-12-22 16:13:08,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:13:08,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:13:08,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:13:08,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:13:08,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:13:08,305 INFO L87 Difference]: Start difference. First operand 665 states and 836 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 16:13:08,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:13:08,363 INFO L93 Difference]: Finished difference Result 1281 states and 1624 transitions. [2021-12-22 16:13:08,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:13:08,364 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 185 [2021-12-22 16:13:08,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:13:08,366 INFO L225 Difference]: With dead ends: 1281 [2021-12-22 16:13:08,366 INFO L226 Difference]: Without dead ends: 668 [2021-12-22 16:13:08,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:13:08,368 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 2 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1607 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:13:08,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1607 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:13:08,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-12-22 16:13:08,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 668. [2021-12-22 16:13:08,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 646 states have (on average 1.2476780185758514) internal successors, (806), 652 states have internal predecessors, (806), 17 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (19), 13 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-22 16:13:08,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 842 transitions. [2021-12-22 16:13:08,381 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 842 transitions. Word has length 185 [2021-12-22 16:13:08,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:13:08,381 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 842 transitions. [2021-12-22 16:13:08,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 16:13:08,381 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 842 transitions. [2021-12-22 16:13:08,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-12-22 16:13:08,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:13:08,383 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-12-22 16:13:08,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 16:13:08,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-22 16:13:08,608 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:13:08,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:13:08,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1844388388, now seen corresponding path program 1 times [2021-12-22 16:13:08,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:13:08,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674390692] [2021-12-22 16:13:08,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:13:08,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:13:08,664 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:13:08,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432338314] [2021-12-22 16:13:08,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:13:08,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:13:08,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:13:08,666 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:13:08,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 16:13:10,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:13:10,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 1430 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 16:13:10,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:13:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 16:13:10,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:13:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-22 16:13:10,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:13:10,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674390692] [2021-12-22 16:13:10,926 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:13:10,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432338314] [2021-12-22 16:13:10,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432338314] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:13:10,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:13:10,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-22 16:13:10,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405437648] [2021-12-22 16:13:10,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:13:10,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 16:13:10,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:13:10,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 16:13:10,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:13:10,928 INFO L87 Difference]: Start difference. First operand 668 states and 842 transitions. Second operand has 8 states, 8 states have (on average 22.375) internal successors, (179), 8 states have internal predecessors, (179), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 16:13:11,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:13:11,112 INFO L93 Difference]: Finished difference Result 1295 states and 1650 transitions. [2021-12-22 16:13:11,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 16:13:11,113 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 8 states have internal predecessors, (179), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 189 [2021-12-22 16:13:11,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:13:11,115 INFO L225 Difference]: With dead ends: 1295 [2021-12-22 16:13:11,115 INFO L226 Difference]: Without dead ends: 677 [2021-12-22 16:13:11,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-12-22 16:13:11,116 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 12 mSDsluCounter, 3170 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3706 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:13:11,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 3706 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:13:11,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-12-22 16:13:11,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 677. [2021-12-22 16:13:11,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 654 states have (on average 1.2507645259938838) internal successors, (818), 660 states have internal predecessors, (818), 17 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (19), 13 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-22 16:13:11,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 854 transitions. [2021-12-22 16:13:11,130 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 854 transitions. Word has length 189 [2021-12-22 16:13:11,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:13:11,130 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 854 transitions. [2021-12-22 16:13:11,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 8 states have internal predecessors, (179), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 16:13:11,131 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 854 transitions. [2021-12-22 16:13:11,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-22 16:13:11,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:13:11,132 INFO L514 BasicCegarLoop]: trace histogram [12, 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] [2021-12-22 16:13:11,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 16:13:11,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-22 16:13:11,360 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:13:11,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:13:11,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1936364000, now seen corresponding path program 2 times [2021-12-22 16:13:11,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:13:11,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877336536] [2021-12-22 16:13:11,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:13:11,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:13:11,429 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:13:11,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188025138] [2021-12-22 16:13:11,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:13:11,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:13:11,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:13:11,443 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:13:11,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 16:13:28,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:13:28,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:13:28,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 1550 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-22 16:13:28,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:13:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 81 proven. 25 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-22 16:13:29,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:13:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-22 16:13:29,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:13:29,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877336536] [2021-12-22 16:13:29,492 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 16:13:29,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188025138] [2021-12-22 16:13:29,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188025138] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:13:29,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:13:29,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-12-22 16:13:29,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66025999] [2021-12-22 16:13:29,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:13:29,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 16:13:29,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:13:29,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 16:13:29,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-22 16:13:29,494 INFO L87 Difference]: Start difference. First operand 677 states and 854 transitions. Second operand has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 states have internal predecessors, (187), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 16:13:29,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:13:29,816 INFO L93 Difference]: Finished difference Result 1316 states and 1687 transitions. [2021-12-22 16:13:29,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 16:13:29,817 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 states have internal predecessors, (187), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 197 [2021-12-22 16:13:29,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:13:29,819 INFO L225 Difference]: With dead ends: 1316 [2021-12-22 16:13:29,819 INFO L226 Difference]: Without dead ends: 692 [2021-12-22 16:13:29,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 379 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-12-22 16:13:29,821 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 56 mSDsluCounter, 3176 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 3712 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:13:29,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 3712 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:13:29,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-12-22 16:13:29,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 683. [2021-12-22 16:13:29,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 660 states have (on average 1.2545454545454546) internal successors, (828), 666 states have internal predecessors, (828), 17 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (19), 13 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-22 16:13:29,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 864 transitions. [2021-12-22 16:13:29,836 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 864 transitions. Word has length 197 [2021-12-22 16:13:29,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:13:29,836 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 864 transitions. [2021-12-22 16:13:29,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 states have internal predecessors, (187), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 16:13:29,837 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 864 transitions. [2021-12-22 16:13:29,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-12-22 16:13:29,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:13:29,838 INFO L514 BasicCegarLoop]: trace histogram [24, 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] [2021-12-22 16:13:29,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 16:13:30,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 16:13:30,039 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 16:13:30,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:13:30,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1895281888, now seen corresponding path program 3 times [2021-12-22 16:13:30,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:13:30,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053296334] [2021-12-22 16:13:30,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:13:30,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:13:30,108 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 16:13:30,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875289621] [2021-12-22 16:13:30,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 16:13:30,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:13:30,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:13:30,110 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:13:30,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process