./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test9-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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_SAX_test9-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d993ff45e37665d9abd93530677e1201b0648bf8ee13fa84b0c68926f580d988 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 18:40:59,981 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 18:40:59,983 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 18:41:00,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 18:41:00,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 18:41:00,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 18:41:00,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 18:41:00,044 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 18:41:00,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 18:41:00,053 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 18:41:00,055 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 18:41:00,056 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 18:41:00,057 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 18:41:00,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 18:41:00,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 18:41:00,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 18:41:00,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 18:41:00,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 18:41:00,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 18:41:00,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 18:41:00,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 18:41:00,082 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 18:41:00,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 18:41:00,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 18:41:00,086 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 18:41:00,090 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 18:41:00,090 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 18:41:00,091 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 18:41:00,093 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 18:41:00,093 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 18:41:00,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 18:41:00,095 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 18:41:00,096 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 18:41:00,097 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 18:41:00,098 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 18:41:00,099 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 18:41:00,099 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 18:41:00,099 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 18:41:00,100 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 18:41:00,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 18:41:00,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 18:41:00,102 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-18 18:41:00,133 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 18:41:00,136 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 18:41:00,137 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 18:41:00,137 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 18:41:00,138 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 18:41:00,139 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 18:41:00,139 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 18:41:00,139 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 18:41:00,140 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 18:41:00,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 18:41:00,141 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 18:41:00,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 18:41:00,141 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 18:41:00,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 18:41:00,141 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-18 18:41:00,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 18:41:00,142 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-18 18:41:00,142 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 18:41:00,142 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-18 18:41:00,142 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 18:41:00,142 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-18 18:41:00,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 18:41:00,143 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 18:41:00,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 18:41:00,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 18:41:00,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 18:41:00,144 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 18:41:00,144 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-18 18:41:00,144 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 18:41:00,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 18:41:00,144 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-18 18:41:00,145 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-18 18:41:00,145 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-18 18:41:00,145 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 18:41:00,145 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d993ff45e37665d9abd93530677e1201b0648bf8ee13fa84b0c68926f580d988 [2021-12-18 18:41:00,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 18:41:00,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 18:41:00,437 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 18:41:00,438 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 18:41:00,439 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 18:41:00,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test9-2.i [2021-12-18 18:41:00,498 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23c6497a0/7a7c64878c054f948bd4f0c04993721a/FLAG43cfaa41f [2021-12-18 18:41:01,245 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 18:41:01,246 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test9-2.i [2021-12-18 18:41:01,268 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23c6497a0/7a7c64878c054f948bd4f0c04993721a/FLAG43cfaa41f [2021-12-18 18:41:01,381 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23c6497a0/7a7c64878c054f948bd4f0c04993721a [2021-12-18 18:41:01,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 18:41:01,386 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 18:41:01,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 18:41:01,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 18:41:01,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 18:41:01,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 06:41:01" (1/1) ... [2021-12-18 18:41:01,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58be80fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:41:01, skipping insertion in model container [2021-12-18 18:41:01,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 06:41:01" (1/1) ... [2021-12-18 18:41:01,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 18:41:01,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 18:41:01,840 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_SAX_test9-2.i[33021,33034] [2021-12-18 18:41:02,074 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_SAX_test9-2.i[84583,84596] [2021-12-18 18:41:02,089 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 18:41:02,100 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 18:41:02,138 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_SAX_test9-2.i[33021,33034] [2021-12-18 18:41:02,265 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_SAX_test9-2.i[84583,84596] [2021-12-18 18:41:02,272 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 18:41:02,306 INFO L208 MainTranslator]: Completed translation [2021-12-18 18:41:02,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:41:02 WrapperNode [2021-12-18 18:41:02,307 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 18:41:02,308 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 18:41:02,308 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 18:41:02,308 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 18:41:02,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:41:02" (1/1) ... [2021-12-18 18:41:02,384 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:41:02" (1/1) ... [2021-12-18 18:41:02,498 INFO L137 Inliner]: procedures = 177, calls = 781, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 3019 [2021-12-18 18:41:02,498 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 18:41:02,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 18:41:02,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 18:41:02,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 18:41:02,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:41:02" (1/1) ... [2021-12-18 18:41:02,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:41:02" (1/1) ... [2021-12-18 18:41:02,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:41:02" (1/1) ... [2021-12-18 18:41:02,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:41:02" (1/1) ... [2021-12-18 18:41:02,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:41:02" (1/1) ... [2021-12-18 18:41:02,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:41:02" (1/1) ... [2021-12-18 18:41:02,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:41:02" (1/1) ... [2021-12-18 18:41:02,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 18:41:02,660 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 18:41:02,660 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 18:41:02,660 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 18:41:02,661 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:41:02" (1/1) ... [2021-12-18 18:41:02,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 18:41:02,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:41:02,700 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) [2021-12-18 18:41:02,742 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 [2021-12-18 18:41:02,775 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 18:41:02,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-18 18:41:02,776 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-18 18:41:02,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 18:41:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-18 18:41:02,778 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-18 18:41:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 18:41:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 18:41:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 18:41:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 18:41:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-18 18:41:02,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 18:41:02,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 18:41:02,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-18 18:41:02,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 18:41:02,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 18:41:03,018 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 18:41:03,020 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 18:41:04,874 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 18:41:04,892 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 18:41:04,893 INFO L301 CfgBuilder]: Removed 63 assume(true) statements. [2021-12-18 18:41:04,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:41:04 BoogieIcfgContainer [2021-12-18 18:41:04,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 18:41:04,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 18:41:04,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 18:41:04,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 18:41:04,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 06:41:01" (1/3) ... [2021-12-18 18:41:04,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57219630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 06:41:04, skipping insertion in model container [2021-12-18 18:41:04,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:41:02" (2/3) ... [2021-12-18 18:41:04,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57219630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 06:41:04, skipping insertion in model container [2021-12-18 18:41:04,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:41:04" (3/3) ... [2021-12-18 18:41:04,909 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test9-2.i [2021-12-18 18:41:04,919 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 18:41:04,919 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-18 18:41:04,974 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 18:41:04,981 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 [2021-12-18 18:41:04,981 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-18 18:41:05,038 INFO L276 IsEmpty]: Start isEmpty. Operand has 1196 states, 688 states have (on average 1.9127906976744187) internal successors, (1316), 1190 states have internal predecessors, (1316), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-18 18:41:05,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 18:41:05,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:41:05,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:41:05,048 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:41:05,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:41:05,054 INFO L85 PathProgramCache]: Analyzing trace with hash -858764483, now seen corresponding path program 1 times [2021-12-18 18:41:05,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:41:05,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669967620] [2021-12-18 18:41:05,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:41:05,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:41:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:41:05,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 18:41:05,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:41:05,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669967620] [2021-12-18 18:41:05,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669967620] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:41:05,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:41:05,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 18:41:05,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089247812] [2021-12-18 18:41:05,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:41:05,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-18 18:41:05,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:41:05,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-18 18:41:05,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-18 18:41:05,274 INFO L87 Difference]: Start difference. First operand has 1196 states, 688 states have (on average 1.9127906976744187) internal successors, (1316), 1190 states have internal predecessors, (1316), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:41:05,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:41:05,442 INFO L93 Difference]: Finished difference Result 2390 states and 5142 transitions. [2021-12-18 18:41:05,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-18 18:41:05,445 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-18 18:41:05,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:41:05,475 INFO L225 Difference]: With dead ends: 2390 [2021-12-18 18:41:05,475 INFO L226 Difference]: Without dead ends: 1163 [2021-12-18 18:41:05,490 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 [2021-12-18 18:41:05,493 INFO L933 BasicCegarLoop]: 2253 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, 2253 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 [2021-12-18 18:41:05,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2253 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 18:41:05,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-12-18 18:41:05,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1163. [2021-12-18 18:41:05,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 656 states have (on average 1.833841463414634) internal successors, (1203), 1157 states have internal predecessors, (1203), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-18 18:41:05,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 2209 transitions. [2021-12-18 18:41:05,821 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 2209 transitions. Word has length 9 [2021-12-18 18:41:05,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:41:05,821 INFO L470 AbstractCegarLoop]: Abstraction has 1163 states and 2209 transitions. [2021-12-18 18:41:05,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:41:05,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 2209 transitions. [2021-12-18 18:41:05,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-18 18:41:05,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:41:05,832 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:41:05,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 18:41:05,833 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:41:05,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:41:05,834 INFO L85 PathProgramCache]: Analyzing trace with hash -293931519, now seen corresponding path program 1 times [2021-12-18 18:41:05,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:41:05,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779818850] [2021-12-18 18:41:05,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:41:05,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:41:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:41:05,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 18:41:05,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:41:05,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779818850] [2021-12-18 18:41:05,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779818850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:41:05,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:41:05,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 18:41:05,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210388767] [2021-12-18 18:41:05,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:41:05,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 18:41:05,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:41:05,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 18:41:05,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 18:41:05,935 INFO L87 Difference]: Start difference. First operand 1163 states and 2209 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:41:07,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:41:07,086 INFO L93 Difference]: Finished difference Result 3333 states and 6429 transitions. [2021-12-18 18:41:07,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 18:41:07,087 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-18 18:41:07,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:41:07,104 INFO L225 Difference]: With dead ends: 3333 [2021-12-18 18:41:07,104 INFO L226 Difference]: Without dead ends: 2264 [2021-12-18 18:41:07,110 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 [2021-12-18 18:41:07,111 INFO L933 BasicCegarLoop]: 2673 mSDtfsCounter, 1128 mSDsluCounter, 4315 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1628 SdHoareTripleChecker+Valid, 6988 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 18:41:07,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1628 Valid, 6988 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-18 18:41:07,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-12-18 18:41:07,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1165. [2021-12-18 18:41:07,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 658 states have (on average 1.831306990881459) internal successors, (1205), 1159 states have internal predecessors, (1205), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-18 18:41:07,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 2211 transitions. [2021-12-18 18:41:07,380 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 2211 transitions. Word has length 44 [2021-12-18 18:41:07,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:41:07,381 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 2211 transitions. [2021-12-18 18:41:07,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:41:07,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 2211 transitions. [2021-12-18 18:41:07,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 18:41:07,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:41:07,384 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] [2021-12-18 18:41:07,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 18:41:07,385 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:41:07,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:41:07,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1509497837, now seen corresponding path program 1 times [2021-12-18 18:41:07,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:41:07,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088170807] [2021-12-18 18:41:07,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:41:07,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:41:07,482 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:41:07,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367941551] [2021-12-18 18:41:07,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:41:07,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:41:07,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:41:07,485 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) [2021-12-18 18:41:07,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 18:41:08,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:41:08,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 1638 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 18:41:08,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:41:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 18:41:08,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:41:08,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:41:08,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088170807] [2021-12-18 18:41:08,228 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:41:08,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367941551] [2021-12-18 18:41:08,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367941551] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:41:08,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:41:08,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 18:41:08,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870559300] [2021-12-18 18:41:08,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:41:08,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 18:41:08,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:41:08,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 18:41:08,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 18:41:08,235 INFO L87 Difference]: Start difference. First operand 1165 states and 2211 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:41:08,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:41:08,327 INFO L93 Difference]: Finished difference Result 2347 states and 4449 transitions. [2021-12-18 18:41:08,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 18:41:08,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-18 18:41:08,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:41:08,336 INFO L225 Difference]: With dead ends: 2347 [2021-12-18 18:41:08,337 INFO L226 Difference]: Without dead ends: 1186 [2021-12-18 18:41:08,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 18:41:08,346 INFO L933 BasicCegarLoop]: 2189 mSDtfsCounter, 9 mSDsluCounter, 2174 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4363 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 [2021-12-18 18:41:08,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 4363 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 18:41:08,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-12-18 18:41:08,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1185. [2021-12-18 18:41:08,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 678 states have (on average 1.8067846607669618) internal successors, (1225), 1179 states have internal predecessors, (1225), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-18 18:41:08,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 2231 transitions. [2021-12-18 18:41:08,535 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 2231 transitions. Word has length 96 [2021-12-18 18:41:08,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:41:08,537 INFO L470 AbstractCegarLoop]: Abstraction has 1185 states and 2231 transitions. [2021-12-18 18:41:08,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:41:08,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 2231 transitions. [2021-12-18 18:41:08,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 18:41:08,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:41:08,545 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] [2021-12-18 18:41:08,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-18 18:41:08,770 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 [2021-12-18 18:41:08,771 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:41:08,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:41:08,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1482432235, now seen corresponding path program 1 times [2021-12-18 18:41:08,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:41:08,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592610859] [2021-12-18 18:41:08,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:41:08,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:41:08,869 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:41:08,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401134868] [2021-12-18 18:41:08,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:41:08,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:41:08,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:41:08,871 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) [2021-12-18 18:41:08,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 18:41:09,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:41:09,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 1640 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 18:41:09,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:41:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 18:41:09,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:41:09,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:41:09,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592610859] [2021-12-18 18:41:09,607 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:41:09,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401134868] [2021-12-18 18:41:09,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401134868] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:41:09,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:41:09,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 18:41:09,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722864252] [2021-12-18 18:41:09,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:41:09,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 18:41:09,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:41:09,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 18:41:09,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 18:41:09,609 INFO L87 Difference]: Start difference. First operand 1185 states and 2231 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:41:09,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:41:09,701 INFO L93 Difference]: Finished difference Result 2274 states and 4348 transitions. [2021-12-18 18:41:09,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 18:41:09,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-18 18:41:09,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:41:09,712 INFO L225 Difference]: With dead ends: 2274 [2021-12-18 18:41:09,712 INFO L226 Difference]: Without dead ends: 1206 [2021-12-18 18:41:09,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 18:41:09,719 INFO L933 BasicCegarLoop]: 2191 mSDtfsCounter, 8 mSDsluCounter, 2174 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 4365 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 18:41:09,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 4365 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 18:41:09,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-12-18 18:41:09,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1205. [2021-12-18 18:41:09,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 698 states have (on average 1.7836676217765044) internal successors, (1245), 1199 states have internal predecessors, (1245), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-18 18:41:09,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 2251 transitions. [2021-12-18 18:41:09,868 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 2251 transitions. Word has length 96 [2021-12-18 18:41:09,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:41:09,868 INFO L470 AbstractCegarLoop]: Abstraction has 1205 states and 2251 transitions. [2021-12-18 18:41:09,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:41:09,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 2251 transitions. [2021-12-18 18:41:09,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 18:41:09,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:41:09,870 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] [2021-12-18 18:41:09,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 18:41:10,083 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 [2021-12-18 18:41:10,084 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:41:10,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:41:10,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1801417811, now seen corresponding path program 1 times [2021-12-18 18:41:10,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:41:10,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034890230] [2021-12-18 18:41:10,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:41:10,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:41:10,170 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:41:10,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2147306531] [2021-12-18 18:41:10,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:41:10,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:41:10,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:41:10,172 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) [2021-12-18 18:41:10,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 18:41:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:41:10,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 18:41:10,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:41:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 18:41:11,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:41:11,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:41:11,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034890230] [2021-12-18 18:41:11,007 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:41:11,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147306531] [2021-12-18 18:41:11,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147306531] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:41:11,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:41:11,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 18:41:11,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171465659] [2021-12-18 18:41:11,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:41:11,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 18:41:11,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:41:11,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 18:41:11,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 18:41:11,010 INFO L87 Difference]: Start difference. First operand 1205 states and 2251 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:41:11,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:41:11,117 INFO L93 Difference]: Finished difference Result 2398 states and 4490 transitions. [2021-12-18 18:41:11,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 18:41:11,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-18 18:41:11,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:41:11,125 INFO L225 Difference]: With dead ends: 2398 [2021-12-18 18:41:11,126 INFO L226 Difference]: Without dead ends: 1197 [2021-12-18 18:41:11,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 18:41:11,132 INFO L933 BasicCegarLoop]: 2189 mSDtfsCounter, 1182 mSDsluCounter, 2697 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1685 SdHoareTripleChecker+Valid, 4886 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 [2021-12-18 18:41:11,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1685 Valid, 4886 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 18:41:11,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-12-18 18:41:11,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 1191. [2021-12-18 18:41:11,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 684 states have (on average 1.7894736842105263) internal successors, (1224), 1185 states have internal predecessors, (1224), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-18 18:41:11,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 2230 transitions. [2021-12-18 18:41:11,318 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 2230 transitions. Word has length 96 [2021-12-18 18:41:11,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:41:11,319 INFO L470 AbstractCegarLoop]: Abstraction has 1191 states and 2230 transitions. [2021-12-18 18:41:11,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:41:11,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 2230 transitions. [2021-12-18 18:41:11,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 18:41:11,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:41:11,320 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] [2021-12-18 18:41:11,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-18 18:41:11,542 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 [2021-12-18 18:41:11,543 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:41:11,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:41:11,544 INFO L85 PathProgramCache]: Analyzing trace with hash 432450363, now seen corresponding path program 1 times [2021-12-18 18:41:11,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:41:11,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375808106] [2021-12-18 18:41:11,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:41:11,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:41:11,635 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:41:11,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1578525108] [2021-12-18 18:41:11,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:41:11,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:41:11,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:41:11,637 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) [2021-12-18 18:41:11,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 18:41:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:41:12,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 1628 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 18:41:12,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:41:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 18:41:12,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:41:12,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:41:12,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375808106] [2021-12-18 18:41:12,480 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:41:12,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578525108] [2021-12-18 18:41:12,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578525108] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:41:12,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:41:12,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 18:41:12,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103300906] [2021-12-18 18:41:12,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:41:12,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 18:41:12,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:41:12,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 18:41:12,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 18:41:12,482 INFO L87 Difference]: Start difference. First operand 1191 states and 2230 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:41:12,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:41:12,594 INFO L93 Difference]: Finished difference Result 2271 states and 4328 transitions. [2021-12-18 18:41:12,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 18:41:12,595 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-18 18:41:12,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:41:12,602 INFO L225 Difference]: With dead ends: 2271 [2021-12-18 18:41:12,602 INFO L226 Difference]: Without dead ends: 1183 [2021-12-18 18:41:12,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 18:41:12,611 INFO L933 BasicCegarLoop]: 2180 mSDtfsCounter, 1076 mSDsluCounter, 2793 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1576 SdHoareTripleChecker+Valid, 4973 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 18:41:12,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1576 Valid, 4973 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 18:41:12,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-12-18 18:41:12,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 1177. [2021-12-18 18:41:12,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 670 states have (on average 1.7955223880597015) internal successors, (1203), 1171 states have internal predecessors, (1203), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-18 18:41:12,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 2209 transitions. [2021-12-18 18:41:12,776 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 2209 transitions. Word has length 96 [2021-12-18 18:41:12,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:41:12,777 INFO L470 AbstractCegarLoop]: Abstraction has 1177 states and 2209 transitions. [2021-12-18 18:41:12,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:41:12,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 2209 transitions. [2021-12-18 18:41:12,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 18:41:12,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:41:12,778 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] [2021-12-18 18:41:12,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 18:41:13,002 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 [2021-12-18 18:41:13,003 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:41:13,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:41:13,003 INFO L85 PathProgramCache]: Analyzing trace with hash -725158097, now seen corresponding path program 1 times [2021-12-18 18:41:13,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:41:13,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824687183] [2021-12-18 18:41:13,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:41:13,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:41:13,078 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:41:13,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303827843] [2021-12-18 18:41:13,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:41:13,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:41:13,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:41:13,080 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) [2021-12-18 18:41:13,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 18:41:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:41:13,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 1616 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 18:41:13,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:41:14,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 18:41:14,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:41:14,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:41:14,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824687183] [2021-12-18 18:41:14,059 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:41:14,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303827843] [2021-12-18 18:41:14,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303827843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:41:14,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:41:14,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 18:41:14,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228487586] [2021-12-18 18:41:14,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:41:14,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 18:41:14,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:41:14,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 18:41:14,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 18:41:14,061 INFO L87 Difference]: Start difference. First operand 1177 states and 2209 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:41:14,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:41:14,211 INFO L93 Difference]: Finished difference Result 3446 states and 6522 transitions. [2021-12-18 18:41:14,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 18:41:14,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-18 18:41:14,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:41:14,226 INFO L225 Difference]: With dead ends: 3446 [2021-12-18 18:41:14,226 INFO L226 Difference]: Without dead ends: 2273 [2021-12-18 18:41:14,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 18:41:14,232 INFO L933 BasicCegarLoop]: 2736 mSDtfsCounter, 1065 mSDsluCounter, 2175 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1567 SdHoareTripleChecker+Valid, 4911 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 18:41:14,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1567 Valid, 4911 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 18:41:14,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-12-18 18:41:14,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 2271. [2021-12-18 18:41:14,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2271 states, 1264 states have (on average 1.8259493670886076) internal successors, (2308), 2265 states have internal predecessors, (2308), 1003 states have call successors, (1003), 2 states have call predecessors, (1003), 2 states have return successors, (1003), 5 states have call predecessors, (1003), 1003 states have call successors, (1003) [2021-12-18 18:41:14,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2271 states to 2271 states and 4314 transitions. [2021-12-18 18:41:14,509 INFO L78 Accepts]: Start accepts. Automaton has 2271 states and 4314 transitions. Word has length 96 [2021-12-18 18:41:14,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:41:14,509 INFO L470 AbstractCegarLoop]: Abstraction has 2271 states and 4314 transitions. [2021-12-18 18:41:14,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:41:14,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2271 states and 4314 transitions. [2021-12-18 18:41:14,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-18 18:41:14,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:41:14,511 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] [2021-12-18 18:41:14,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 18:41:14,735 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 [2021-12-18 18:41:14,736 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:41:14,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:41:14,736 INFO L85 PathProgramCache]: Analyzing trace with hash -892194403, now seen corresponding path program 1 times [2021-12-18 18:41:14,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:41:14,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44416681] [2021-12-18 18:41:14,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:41:14,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:41:14,773 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:41:14,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713349055] [2021-12-18 18:41:14,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:41:14,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:41:14,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:41:14,775 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) [2021-12-18 18:41:14,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 18:41:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:41:15,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 18:41:15,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:41:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 18:41:15,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:41:15,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:41:15,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44416681] [2021-12-18 18:41:15,540 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:41:15,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713349055] [2021-12-18 18:41:15,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713349055] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:41:15,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:41:15,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 18:41:15,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867607182] [2021-12-18 18:41:15,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:41:15,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 18:41:15,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:41:15,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 18:41:15,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 18:41:15,542 INFO L87 Difference]: Start difference. First operand 2271 states and 4314 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 18:41:16,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:41:16,632 INFO L93 Difference]: Finished difference Result 3444 states and 6519 transitions. [2021-12-18 18:41:16,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 18:41:16,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2021-12-18 18:41:16,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:41:16,641 INFO L225 Difference]: With dead ends: 3444 [2021-12-18 18:41:16,642 INFO L226 Difference]: Without dead ends: 1221 [2021-12-18 18:41:16,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 18:41:16,651 INFO L933 BasicCegarLoop]: 2201 mSDtfsCounter, 2254 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1003 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2254 SdHoareTripleChecker+Valid, 3272 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1003 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 18:41:16,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2254 Valid, 3272 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1003 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-18 18:41:16,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-12-18 18:41:16,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1221. [2021-12-18 18:41:16,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 714 states have (on average 1.7507002801120448) internal successors, (1250), 1215 states have internal predecessors, (1250), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-18 18:41:16,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 2256 transitions. [2021-12-18 18:41:16,835 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 2256 transitions. Word has length 111 [2021-12-18 18:41:16,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:41:16,836 INFO L470 AbstractCegarLoop]: Abstraction has 1221 states and 2256 transitions. [2021-12-18 18:41:16,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 18:41:16,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 2256 transitions. [2021-12-18 18:41:16,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-18 18:41:16,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:41:16,841 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] [2021-12-18 18:41:16,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 18:41:17,063 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 [2021-12-18 18:41:17,064 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:41:17,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:41:17,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1386255789, now seen corresponding path program 1 times [2021-12-18 18:41:17,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:41:17,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317369843] [2021-12-18 18:41:17,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:41:17,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:41:17,105 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:41:17,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434777241] [2021-12-18 18:41:17,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:41:17,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:41:17,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:41:17,110 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) [2021-12-18 18:41:17,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 18:41:17,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:41:17,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 18:41:17,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:41:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 18:41:18,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:41:18,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:41:18,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317369843] [2021-12-18 18:41:18,101 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:41:18,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434777241] [2021-12-18 18:41:18,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434777241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:41:18,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:41:18,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 18:41:18,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779831104] [2021-12-18 18:41:18,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:41:18,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 18:41:18,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:41:18,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 18:41:18,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 18:41:18,103 INFO L87 Difference]: Start difference. First operand 1221 states and 2256 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 18:41:18,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:41:18,191 INFO L93 Difference]: Finished difference Result 2394 states and 4461 transitions. [2021-12-18 18:41:18,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 18:41:18,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 118 [2021-12-18 18:41:18,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:41:18,203 INFO L225 Difference]: With dead ends: 2394 [2021-12-18 18:41:18,204 INFO L226 Difference]: Without dead ends: 1224 [2021-12-18 18:41:18,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 18:41:18,211 INFO L933 BasicCegarLoop]: 2191 mSDtfsCounter, 2 mSDsluCounter, 4378 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6569 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 18:41:18,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 6569 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 18:41:18,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-12-18 18:41:18,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1224. [2021-12-18 18:41:18,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 716 states have (on average 1.75) internal successors, (1253), 1218 states have internal predecessors, (1253), 503 states have call successors, (503), 2 states have call predecessors, (503), 3 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2021-12-18 18:41:18,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 2260 transitions. [2021-12-18 18:41:18,387 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 2260 transitions. Word has length 118 [2021-12-18 18:41:18,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:41:18,388 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 2260 transitions. [2021-12-18 18:41:18,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 18:41:18,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 2260 transitions. [2021-12-18 18:41:18,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-18 18:41:18,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:41:18,390 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:41:18,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 18:41:18,603 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 [2021-12-18 18:41:18,603 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:41:18,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:41:18,604 INFO L85 PathProgramCache]: Analyzing trace with hash 137059189, now seen corresponding path program 1 times [2021-12-18 18:41:18,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:41:18,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945424546] [2021-12-18 18:41:18,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:41:18,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:41:18,647 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:41:18,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903756047] [2021-12-18 18:41:18,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:41:18,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:41:18,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:41:18,649 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) [2021-12-18 18:41:18,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 18:41:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:41:19,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-18 18:41:19,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:41:19,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 18:41:19,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 18:41:19,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 18:41:19,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:41:19,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945424546] [2021-12-18 18:41:19,834 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:41:19,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903756047] [2021-12-18 18:41:19,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903756047] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 18:41:19,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 18:41:19,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-18 18:41:19,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040986464] [2021-12-18 18:41:19,834 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 18:41:19,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 18:41:19,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:41:19,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 18:41:19,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-18 18:41:19,836 INFO L87 Difference]: Start difference. First operand 1224 states and 2260 transitions. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 18:41:20,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:41:20,040 INFO L93 Difference]: Finished difference Result 2408 states and 4482 transitions. [2021-12-18 18:41:20,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 18:41:20,041 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 120 [2021-12-18 18:41:20,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:41:20,049 INFO L225 Difference]: With dead ends: 2408 [2021-12-18 18:41:20,049 INFO L226 Difference]: Without dead ends: 1235 [2021-12-18 18:41:20,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-12-18 18:41:20,055 INFO L933 BasicCegarLoop]: 2192 mSDtfsCounter, 11 mSDsluCounter, 13125 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 15317 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 18:41:20,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 15317 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 18:41:20,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2021-12-18 18:41:20,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 1233. [2021-12-18 18:41:20,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 724 states have (on average 1.75) internal successors, (1267), 1226 states have internal predecessors, (1267), 503 states have call successors, (503), 3 states have call predecessors, (503), 4 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2021-12-18 18:41:20,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 2274 transitions. [2021-12-18 18:41:20,226 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 2274 transitions. Word has length 120 [2021-12-18 18:41:20,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:41:20,227 INFO L470 AbstractCegarLoop]: Abstraction has 1233 states and 2274 transitions. [2021-12-18 18:41:20,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 18:41:20,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 2274 transitions. [2021-12-18 18:41:20,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-18 18:41:20,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:41:20,229 INFO L514 BasicCegarLoop]: trace histogram [6, 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] [2021-12-18 18:41:20,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 18:41:20,443 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 [2021-12-18 18:41:20,443 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:41:20,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:41:20,444 INFO L85 PathProgramCache]: Analyzing trace with hash -18567917, now seen corresponding path program 2 times [2021-12-18 18:41:20,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:41:20,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532501007] [2021-12-18 18:41:20,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:41:20,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:41:20,509 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:41:20,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754376993] [2021-12-18 18:41:20,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 18:41:20,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:41:20,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:41:20,511 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) [2021-12-18 18:41:20,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 18:41:21,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 18:41:21,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 18:41:21,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-18 18:41:21,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:41:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 18:41:21,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 18:41:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 18:41:21,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:41:21,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532501007] [2021-12-18 18:41:21,817 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:41:21,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754376993] [2021-12-18 18:41:21,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754376993] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 18:41:21,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 18:41:21,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-12-18 18:41:21,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022207629] [2021-12-18 18:41:21,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 18:41:21,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 18:41:21,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:41:21,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 18:41:21,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-12-18 18:41:21,819 INFO L87 Difference]: Start difference. First operand 1233 states and 2274 transitions. Second operand has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 18:41:22,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:41:22,760 INFO L93 Difference]: Finished difference Result 2428 states and 4512 transitions. [2021-12-18 18:41:22,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 18:41:22,761 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 124 [2021-12-18 18:41:22,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:41:22,769 INFO L225 Difference]: With dead ends: 2428 [2021-12-18 18:41:22,769 INFO L226 Difference]: Without dead ends: 1246 [2021-12-18 18:41:22,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2021-12-18 18:41:22,775 INFO L933 BasicCegarLoop]: 2193 mSDtfsCounter, 62 mSDsluCounter, 17493 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 19686 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 18:41:22,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 19686 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 18:41:22,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-12-18 18:41:22,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1242. [2021-12-18 18:41:22,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 733 states have (on average 1.7407912687585265) internal successors, (1276), 1235 states have internal predecessors, (1276), 503 states have call successors, (503), 3 states have call predecessors, (503), 4 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2021-12-18 18:41:22,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 2283 transitions. [2021-12-18 18:41:22,940 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 2283 transitions. Word has length 124 [2021-12-18 18:41:22,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:41:22,941 INFO L470 AbstractCegarLoop]: Abstraction has 1242 states and 2283 transitions. [2021-12-18 18:41:22,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 18:41:22,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 2283 transitions. [2021-12-18 18:41:22,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-18 18:41:22,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:41:22,942 INFO L514 BasicCegarLoop]: trace histogram [12, 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] [2021-12-18 18:41:22,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 18:41:23,167 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 [2021-12-18 18:41:23,167 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:41:23,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:41:23,168 INFO L85 PathProgramCache]: Analyzing trace with hash 301521811, now seen corresponding path program 3 times [2021-12-18 18:41:23,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:41:23,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996992793] [2021-12-18 18:41:23,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:41:23,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:41:23,226 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:41:23,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855698136] [2021-12-18 18:41:23,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 18:41:23,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:41:23,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:41:23,228 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) [2021-12-18 18:41:23,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 18:42:20,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-18 18:42:20,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 18:42:20,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 18:42:20,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:42:20,344 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-18 18:42:20,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 18:42:20,571 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-18 18:42:20,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:42:20,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996992793] [2021-12-18 18:42:20,571 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:42:20,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855698136] [2021-12-18 18:42:20,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855698136] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 18:42:20,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 18:42:20,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-18 18:42:20,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873931039] [2021-12-18 18:42:20,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 18:42:20,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 18:42:20,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:42:20,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 18:42:20,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-18 18:42:20,574 INFO L87 Difference]: Start difference. First operand 1242 states and 2283 transitions. Second operand has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 18:42:20,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:42:20,819 INFO L93 Difference]: Finished difference Result 2423 states and 4498 transitions. [2021-12-18 18:42:20,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 18:42:20,819 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 130 [2021-12-18 18:42:20,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:42:20,827 INFO L225 Difference]: With dead ends: 2423 [2021-12-18 18:42:20,827 INFO L226 Difference]: Without dead ends: 1249 [2021-12-18 18:42:20,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-12-18 18:42:20,833 INFO L933 BasicCegarLoop]: 2192 mSDtfsCounter, 27 mSDsluCounter, 8757 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 10949 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 18:42:20,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 10949 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 18:42:20,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2021-12-18 18:42:21,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1243. [2021-12-18 18:42:21,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 734 states have (on average 1.7411444141689374) internal successors, (1278), 1236 states have internal predecessors, (1278), 503 states have call successors, (503), 3 states have call predecessors, (503), 4 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2021-12-18 18:42:21,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 2285 transitions. [2021-12-18 18:42:21,048 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 2285 transitions. Word has length 130 [2021-12-18 18:42:21,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:42:21,048 INFO L470 AbstractCegarLoop]: Abstraction has 1243 states and 2285 transitions. [2021-12-18 18:42:21,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 18:42:21,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 2285 transitions. [2021-12-18 18:42:21,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-18 18:42:21,050 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:42:21,050 INFO L514 BasicCegarLoop]: trace histogram [16, 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] [2021-12-18 18:42:21,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-18 18:42:21,267 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 [2021-12-18 18:42:21,268 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:42:21,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:42:21,268 INFO L85 PathProgramCache]: Analyzing trace with hash -276049133, now seen corresponding path program 4 times [2021-12-18 18:42:21,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:42:21,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146557286] [2021-12-18 18:42:21,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:42:21,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:42:21,324 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:42:21,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253034861] [2021-12-18 18:42:21,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 18:42:21,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:42:21,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:42:21,333 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) [2021-12-18 18:42:21,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 18:42:31,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 18:42:31,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 18:42:31,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-18 18:42:31,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:42:31,636 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 3 proven. 142 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-18 18:42:31,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 18:42:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 81 proven. 21 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-18 18:42:32,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:42:32,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146557286] [2021-12-18 18:42:32,108 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:42:32,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253034861] [2021-12-18 18:42:32,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253034861] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 18:42:32,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 18:42:32,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-12-18 18:42:32,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138410384] [2021-12-18 18:42:32,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 18:42:32,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 18:42:32,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:42:32,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 18:42:32,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-12-18 18:42:32,111 INFO L87 Difference]: Start difference. First operand 1243 states and 2285 transitions. Second operand has 20 states, 20 states have (on average 6.75) internal successors, (135), 20 states have internal predecessors, (135), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-18 18:42:35,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:42:35,963 INFO L93 Difference]: Finished difference Result 2444 states and 4533 transitions. [2021-12-18 18:42:35,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-18 18:42:35,964 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.75) internal successors, (135), 20 states have internal predecessors, (135), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 134 [2021-12-18 18:42:35,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:42:35,971 INFO L225 Difference]: With dead ends: 2444 [2021-12-18 18:42:35,972 INFO L226 Difference]: Without dead ends: 1267 [2021-12-18 18:42:35,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=558, Invalid=1698, Unknown=0, NotChecked=0, Total=2256 [2021-12-18 18:42:35,978 INFO L933 BasicCegarLoop]: 2194 mSDtfsCounter, 109 mSDsluCounter, 19715 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 21909 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 18:42:35,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 21909 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 18:42:35,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-12-18 18:42:36,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1258. [2021-12-18 18:42:36,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 749 states have (on average 1.7316421895861147) internal successors, (1297), 1250 states have internal predecessors, (1297), 503 states have call successors, (503), 4 states have call predecessors, (503), 4 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2021-12-18 18:42:36,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 2304 transitions. [2021-12-18 18:42:36,169 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 2304 transitions. Word has length 134 [2021-12-18 18:42:36,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:42:36,169 INFO L470 AbstractCegarLoop]: Abstraction has 1258 states and 2304 transitions. [2021-12-18 18:42:36,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.75) internal successors, (135), 20 states have internal predecessors, (135), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-18 18:42:36,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 2304 transitions. [2021-12-18 18:42:36,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-18 18:42:36,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:42:36,173 INFO L514 BasicCegarLoop]: trace histogram [24, 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] [2021-12-18 18:42:36,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-18 18:42:36,395 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 [2021-12-18 18:42:36,395 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:42:36,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:42:36,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1464172013, now seen corresponding path program 5 times [2021-12-18 18:42:36,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:42:36,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333026319] [2021-12-18 18:42:36,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:42:36,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:42:36,440 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:42:36,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360954387] [2021-12-18 18:42:36,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 18:42:36,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:42:36,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:42:36,441 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) [2021-12-18 18:42:36,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process Killed by 15