./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 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_SFH_test2-2.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 2a3326bc22943076798f4c55311213b2a5f9b1e03e68dc17c2ac5a3393252251 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-17 15:51:19,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-17 15:51:20,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-17 15:51:20,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-17 15:51:20,044 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-17 15:51:20,046 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-17 15:51:20,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-17 15:51:20,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-17 15:51:20,054 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-17 15:51:20,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-17 15:51:20,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-17 15:51:20,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-17 15:51:20,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-17 15:51:20,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-17 15:51:20,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-17 15:51:20,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-17 15:51:20,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-17 15:51:20,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-17 15:51:20,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-17 15:51:20,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-17 15:51:20,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-17 15:51:20,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-17 15:51:20,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-17 15:51:20,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-17 15:51:20,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-17 15:51:20,087 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-17 15:51:20,087 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-17 15:51:20,089 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-17 15:51:20,089 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-17 15:51:20,090 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-17 15:51:20,090 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-17 15:51:20,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-17 15:51:20,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-17 15:51:20,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-17 15:51:20,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-17 15:51:20,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-17 15:51:20,094 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-17 15:51:20,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-17 15:51:20,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-17 15:51:20,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-17 15:51:20,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-17 15:51:20,098 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-17 15:51:20,124 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-17 15:51:20,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-17 15:51:20,129 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-17 15:51:20,129 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-17 15:51:20,130 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-17 15:51:20,130 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-17 15:51:20,131 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-17 15:51:20,131 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-17 15:51:20,131 INFO L138 SettingsManager]: * Use SBE=true [2021-11-17 15:51:20,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-17 15:51:20,132 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-17 15:51:20,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-17 15:51:20,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-17 15:51:20,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-17 15:51:20,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-17 15:51:20,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-17 15:51:20,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-17 15:51:20,133 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-17 15:51:20,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-17 15:51:20,133 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-17 15:51:20,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-17 15:51:20,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-17 15:51:20,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-17 15:51:20,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-17 15:51:20,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-17 15:51:20,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-17 15:51:20,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-17 15:51:20,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-17 15:51:20,136 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-17 15:51:20,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-17 15:51:20,136 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-17 15:51:20,136 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-17 15:51:20,136 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-17 15:51:20,136 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-17 15:51:20,137 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a3326bc22943076798f4c55311213b2a5f9b1e03e68dc17c2ac5a3393252251 [2021-11-17 15:51:20,340 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-17 15:51:20,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-17 15:51:20,372 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-17 15:51:20,373 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-17 15:51:20,373 INFO L275 PluginConnector]: CDTParser initialized [2021-11-17 15:51:20,374 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i [2021-11-17 15:51:20,446 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8d85bdca/9d117c7e4623448bab94c8cfae0dda29/FLAG6a1394afb [2021-11-17 15:51:20,885 INFO L306 CDTParser]: Found 1 translation units. [2021-11-17 15:51:20,886 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i [2021-11-17 15:51:20,899 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8d85bdca/9d117c7e4623448bab94c8cfae0dda29/FLAG6a1394afb [2021-11-17 15:51:20,910 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8d85bdca/9d117c7e4623448bab94c8cfae0dda29 [2021-11-17 15:51:20,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-17 15:51:20,913 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-17 15:51:20,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-17 15:51:20,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-17 15:51:20,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-17 15:51:20,919 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:51:20" (1/1) ... [2021-11-17 15:51:20,920 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47932abc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:51:20, skipping insertion in model container [2021-11-17 15:51:20,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:51:20" (1/1) ... [2021-11-17 15:51:20,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-17 15:51:20,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-17 15:51:21,441 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_SFH_test2-2.i[37019,37032] [2021-11-17 15:51:21,540 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_SFH_test2-2.i[47352,47365] [2021-11-17 15:51:21,564 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-17 15:51:21,579 INFO L203 MainTranslator]: Completed pre-run [2021-11-17 15:51:21,609 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_SFH_test2-2.i[37019,37032] [2021-11-17 15:51:21,673 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_SFH_test2-2.i[47352,47365] [2021-11-17 15:51:21,680 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-17 15:51:21,716 INFO L208 MainTranslator]: Completed translation [2021-11-17 15:51:21,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:51:21 WrapperNode [2021-11-17 15:51:21,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-17 15:51:21,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-17 15:51:21,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-17 15:51:21,718 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-17 15:51:21,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:51:21" (1/1) ... [2021-11-17 15:51:21,746 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:51:21" (1/1) ... [2021-11-17 15:51:21,791 INFO L137 Inliner]: procedures = 208, calls = 286, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1039 [2021-11-17 15:51:21,791 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-17 15:51:21,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-17 15:51:21,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-17 15:51:21,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-17 15:51:21,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:51:21" (1/1) ... [2021-11-17 15:51:21,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:51:21" (1/1) ... [2021-11-17 15:51:21,821 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:51:21" (1/1) ... [2021-11-17 15:51:21,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:51:21" (1/1) ... [2021-11-17 15:51:21,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:51:21" (1/1) ... [2021-11-17 15:51:21,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:51:21" (1/1) ... [2021-11-17 15:51:21,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:51:21" (1/1) ... [2021-11-17 15:51:21,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-17 15:51:21,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-17 15:51:21,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-17 15:51:21,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-17 15:51:21,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:51:21" (1/1) ... [2021-11-17 15:51:21,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-17 15:51:21,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:51:21,905 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) [2021-11-17 15:51:21,937 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 [2021-11-17 15:51:21,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-17 15:51:21,960 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-17 15:51:21,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-17 15:51:21,962 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-17 15:51:21,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-17 15:51:21,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-17 15:51:21,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-17 15:51:21,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-17 15:51:21,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-17 15:51:21,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-17 15:51:21,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-17 15:51:21,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-17 15:51:21,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-17 15:51:21,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-17 15:51:21,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-17 15:51:21,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-17 15:51:22,175 INFO L236 CfgBuilder]: Building ICFG [2021-11-17 15:51:22,176 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-17 15:51:22,902 INFO L277 CfgBuilder]: Performing block encoding [2021-11-17 15:51:22,907 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-17 15:51:22,908 INFO L301 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-17 15:51:22,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:51:22 BoogieIcfgContainer [2021-11-17 15:51:22,909 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-17 15:51:22,910 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-17 15:51:22,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-17 15:51:22,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-17 15:51:22,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:51:20" (1/3) ... [2021-11-17 15:51:22,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4312667f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:51:22, skipping insertion in model container [2021-11-17 15:51:22,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:51:21" (2/3) ... [2021-11-17 15:51:22,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4312667f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:51:22, skipping insertion in model container [2021-11-17 15:51:22,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:51:22" (3/3) ... [2021-11-17 15:51:22,915 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test2-2.i [2021-11-17 15:51:22,918 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-17 15:51:22,918 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-17 15:51:22,947 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-17 15:51:22,962 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 [2021-11-17 15:51:22,963 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-17 15:51:22,979 INFO L276 IsEmpty]: Start isEmpty. Operand has 206 states, 193 states have (on average 1.689119170984456) internal successors, (326), 200 states have internal predecessors, (326), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-17 15:51:22,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-17 15:51:22,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:51:22,983 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:51:22,984 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 15:51:22,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:51:22,988 INFO L85 PathProgramCache]: Analyzing trace with hash -858859523, now seen corresponding path program 1 times [2021-11-17 15:51:22,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:51:22,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558664972] [2021-11-17 15:51:22,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:51:22,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:51:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:51:23,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:51:23,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:51:23,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558664972] [2021-11-17 15:51:23,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558664972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:51:23,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:51:23,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-17 15:51:23,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179390203] [2021-11-17 15:51:23,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:51:23,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-17 15:51:23,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:51:23,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-17 15:51:23,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-17 15:51:23,119 INFO L87 Difference]: Start difference. First operand has 206 states, 193 states have (on average 1.689119170984456) internal successors, (326), 200 states have internal predecessors, (326), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) 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) [2021-11-17 15:51:23,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:51:23,183 INFO L93 Difference]: Finished difference Result 410 states and 687 transitions. [2021-11-17 15:51:23,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-17 15:51:23,185 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 [2021-11-17 15:51:23,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:51:23,195 INFO L225 Difference]: With dead ends: 410 [2021-11-17 15:51:23,195 INFO L226 Difference]: Without dead ends: 173 [2021-11-17 15:51:23,201 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 [2021-11-17 15:51:23,204 INFO L933 BasicCegarLoop]: 273 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, 273 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 [2021-11-17 15:51:23,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-17 15:51:23,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-17 15:51:23,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-11-17 15:51:23,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 161 states have (on average 1.3229813664596273) internal successors, (213), 167 states have internal predecessors, (213), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-17 15:51:23,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 229 transitions. [2021-11-17 15:51:23,238 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 229 transitions. Word has length 9 [2021-11-17 15:51:23,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:51:23,238 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 229 transitions. [2021-11-17 15:51:23,239 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) [2021-11-17 15:51:23,239 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 229 transitions. [2021-11-17 15:51:23,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-17 15:51:23,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:51:23,240 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] [2021-11-17 15:51:23,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-17 15:51:23,241 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 15:51:23,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:51:23,241 INFO L85 PathProgramCache]: Analyzing trace with hash -294026559, now seen corresponding path program 1 times [2021-11-17 15:51:23,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:51:23,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675316354] [2021-11-17 15:51:23,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:51:23,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:51:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:51:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:51:23,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:51:23,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675316354] [2021-11-17 15:51:23,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675316354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:51:23,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:51:23,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-17 15:51:23,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661709515] [2021-11-17 15:51:23,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:51:23,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-17 15:51:23,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:51:23,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-17 15:51:23,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-17 15:51:23,293 INFO L87 Difference]: Start difference. First operand 173 states and 229 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) [2021-11-17 15:51:23,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:51:23,654 INFO L93 Difference]: Finished difference Result 363 states and 489 transitions. [2021-11-17 15:51:23,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-17 15:51:23,655 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 [2021-11-17 15:51:23,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:51:23,656 INFO L225 Difference]: With dead ends: 363 [2021-11-17 15:51:23,656 INFO L226 Difference]: Without dead ends: 284 [2021-11-17 15:51:23,657 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 [2021-11-17 15:51:23,658 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 138 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-17 15:51:23,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 553 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-17 15:51:23,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-17 15:51:23,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 175. [2021-11-17 15:51:23,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 163 states have (on average 1.3190184049079754) internal successors, (215), 169 states have internal predecessors, (215), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-17 15:51:23,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 231 transitions. [2021-11-17 15:51:23,670 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 231 transitions. Word has length 44 [2021-11-17 15:51:23,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:51:23,670 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 231 transitions. [2021-11-17 15:51:23,670 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) [2021-11-17 15:51:23,670 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 231 transitions. [2021-11-17 15:51:23,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-17 15:51:23,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:51:23,673 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] [2021-11-17 15:51:23,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-17 15:51:23,673 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 15:51:23,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:51:23,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1509402797, now seen corresponding path program 1 times [2021-11-17 15:51:23,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:51:23,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690894173] [2021-11-17 15:51:23,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:51:23,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:51:23,688 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:51:23,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108986891] [2021-11-17 15:51:23,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:51:23,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:51:23,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:51:23,708 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) [2021-11-17 15:51:23,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-17 15:51:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:51:23,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-17 15:51:23,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:51:24,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:51:24,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:51:24,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:51:24,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690894173] [2021-11-17 15:51:24,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:51:24,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108986891] [2021-11-17 15:51:24,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108986891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:51:24,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:51:24,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-17 15:51:24,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435794262] [2021-11-17 15:51:24,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:51:24,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-17 15:51:24,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:51:24,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-17 15:51:24,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 15:51:24,108 INFO L87 Difference]: Start difference. First operand 175 states and 231 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) [2021-11-17 15:51:24,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:51:24,166 INFO L93 Difference]: Finished difference Result 367 states and 489 transitions. [2021-11-17 15:51:24,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-17 15:51:24,166 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 [2021-11-17 15:51:24,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:51:24,168 INFO L225 Difference]: With dead ends: 367 [2021-11-17 15:51:24,168 INFO L226 Difference]: Without dead ends: 196 [2021-11-17 15:51:24,169 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 [2021-11-17 15:51:24,171 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 9 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 403 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 [2021-11-17 15:51:24,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 403 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-17 15:51:24,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-17 15:51:24,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2021-11-17 15:51:24,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 183 states have (on average 1.284153005464481) internal successors, (235), 189 states have internal predecessors, (235), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-17 15:51:24,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 251 transitions. [2021-11-17 15:51:24,195 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 251 transitions. Word has length 96 [2021-11-17 15:51:24,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:51:24,196 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 251 transitions. [2021-11-17 15:51:24,196 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) [2021-11-17 15:51:24,196 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 251 transitions. [2021-11-17 15:51:24,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-17 15:51:24,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:51:24,199 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] [2021-11-17 15:51:24,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-17 15:51:24,422 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 [2021-11-17 15:51:24,423 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 15:51:24,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:51:24,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1482337195, now seen corresponding path program 1 times [2021-11-17 15:51:24,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:51:24,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008494537] [2021-11-17 15:51:24,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:51:24,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:51:24,437 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:51:24,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23176251] [2021-11-17 15:51:24,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:51:24,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:51:24,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:51:24,466 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) [2021-11-17 15:51:24,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-17 15:51:24,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:51:24,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-17 15:51:24,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:51:24,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-17 15:51:24,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:51:24,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:51:24,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008494537] [2021-11-17 15:51:24,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:51:24,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23176251] [2021-11-17 15:51:24,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23176251] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:51:24,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:51:24,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-17 15:51:24,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431074273] [2021-11-17 15:51:24,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:51:24,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-17 15:51:24,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:51:24,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-17 15:51:24,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 15:51:24,771 INFO L87 Difference]: Start difference. First operand 195 states and 251 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) [2021-11-17 15:51:24,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:51:24,830 INFO L93 Difference]: Finished difference Result 294 states and 388 transitions. [2021-11-17 15:51:24,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-17 15:51:24,831 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 [2021-11-17 15:51:24,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:51:24,832 INFO L225 Difference]: With dead ends: 294 [2021-11-17 15:51:24,832 INFO L226 Difference]: Without dead ends: 216 [2021-11-17 15:51:24,833 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 [2021-11-17 15:51:24,833 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 8 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 405 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 [2021-11-17 15:51:24,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 405 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 15:51:24,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-17 15:51:24,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2021-11-17 15:51:24,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 203 states have (on average 1.2561576354679802) internal successors, (255), 209 states have internal predecessors, (255), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-17 15:51:24,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 271 transitions. [2021-11-17 15:51:24,839 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 271 transitions. Word has length 96 [2021-11-17 15:51:24,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:51:24,839 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 271 transitions. [2021-11-17 15:51:24,840 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) [2021-11-17 15:51:24,840 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 271 transitions. [2021-11-17 15:51:24,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-17 15:51:24,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:51:24,841 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] [2021-11-17 15:51:24,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-17 15:51:25,062 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 [2021-11-17 15:51:25,063 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 15:51:25,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:51:25,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1801512851, now seen corresponding path program 1 times [2021-11-17 15:51:25,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:51:25,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113111865] [2021-11-17 15:51:25,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:51:25,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:51:25,077 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:51:25,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [425267884] [2021-11-17 15:51:25,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:51:25,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:51:25,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:51:25,097 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) [2021-11-17 15:51:25,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-17 15:51:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:51:25,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-17 15:51:25,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:51:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:51:25,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:51:25,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:51:25,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113111865] [2021-11-17 15:51:25,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:51:25,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425267884] [2021-11-17 15:51:25,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425267884] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:51:25,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:51:25,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-17 15:51:25,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928639503] [2021-11-17 15:51:25,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:51:25,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-17 15:51:25,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:51:25,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-17 15:51:25,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-17 15:51:25,434 INFO L87 Difference]: Start difference. First operand 215 states and 271 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) [2021-11-17 15:51:25,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:51:25,494 INFO L93 Difference]: Finished difference Result 418 states and 530 transitions. [2021-11-17 15:51:25,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-17 15:51:25,495 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 [2021-11-17 15:51:25,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:51:25,496 INFO L225 Difference]: With dead ends: 418 [2021-11-17 15:51:25,496 INFO L226 Difference]: Without dead ends: 207 [2021-11-17 15:51:25,497 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 [2021-11-17 15:51:25,498 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 192 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 431 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 [2021-11-17 15:51:25,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 431 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-17 15:51:25,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-17 15:51:25,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 201. [2021-11-17 15:51:25,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 189 states have (on average 1.2380952380952381) internal successors, (234), 195 states have internal predecessors, (234), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-17 15:51:25,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 250 transitions. [2021-11-17 15:51:25,504 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 250 transitions. Word has length 96 [2021-11-17 15:51:25,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:51:25,504 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 250 transitions. [2021-11-17 15:51:25,504 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) [2021-11-17 15:51:25,504 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 250 transitions. [2021-11-17 15:51:25,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-17 15:51:25,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:51:25,506 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] [2021-11-17 15:51:25,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-17 15:51:25,726 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 [2021-11-17 15:51:25,726 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 15:51:25,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:51:25,727 INFO L85 PathProgramCache]: Analyzing trace with hash 432355323, now seen corresponding path program 1 times [2021-11-17 15:51:25,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:51:25,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623583376] [2021-11-17 15:51:25,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:51:25,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:51:25,747 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:51:25,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812372040] [2021-11-17 15:51:25,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:51:25,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:51:25,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:51:25,772 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) [2021-11-17 15:51:25,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-17 15:51:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:51:25,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-17 15:51:25,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:51:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-17 15:51:26,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:51:26,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:51:26,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623583376] [2021-11-17 15:51:26,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:51:26,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812372040] [2021-11-17 15:51:26,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812372040] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:51:26,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:51:26,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-17 15:51:26,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561719637] [2021-11-17 15:51:26,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:51:26,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-17 15:51:26,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:51:26,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-17 15:51:26,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-17 15:51:26,102 INFO L87 Difference]: Start difference. First operand 201 states and 250 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) [2021-11-17 15:51:26,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:51:26,167 INFO L93 Difference]: Finished difference Result 291 states and 368 transitions. [2021-11-17 15:51:26,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-17 15:51:26,167 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 [2021-11-17 15:51:26,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:51:26,168 INFO L225 Difference]: With dead ends: 291 [2021-11-17 15:51:26,169 INFO L226 Difference]: Without dead ends: 193 [2021-11-17 15:51:26,169 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 [2021-11-17 15:51:26,170 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 80 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-17 15:51:26,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 571 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 15:51:26,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-17 15:51:26,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 187. [2021-11-17 15:51:26,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 175 states have (on average 1.217142857142857) internal successors, (213), 181 states have internal predecessors, (213), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-17 15:51:26,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 229 transitions. [2021-11-17 15:51:26,175 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 229 transitions. Word has length 96 [2021-11-17 15:51:26,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:51:26,176 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 229 transitions. [2021-11-17 15:51:26,176 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) [2021-11-17 15:51:26,176 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 229 transitions. [2021-11-17 15:51:26,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-17 15:51:26,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:51:26,177 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] [2021-11-17 15:51:26,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-17 15:51:26,390 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 [2021-11-17 15:51:26,391 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 15:51:26,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:51:26,394 INFO L85 PathProgramCache]: Analyzing trace with hash -725253137, now seen corresponding path program 1 times [2021-11-17 15:51:26,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:51:26,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386936957] [2021-11-17 15:51:26,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:51:26,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:51:26,416 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:51:26,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684045426] [2021-11-17 15:51:26,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:51:26,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:51:26,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:51:26,424 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) [2021-11-17 15:51:26,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-17 15:51:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:51:26,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-17 15:51:26,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:51:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:51:26,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:51:26,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:51:26,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386936957] [2021-11-17 15:51:26,793 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:51:26,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684045426] [2021-11-17 15:51:26,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684045426] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:51:26,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:51:26,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-17 15:51:26,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497165641] [2021-11-17 15:51:26,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:51:26,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-17 15:51:26,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:51:26,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-17 15:51:26,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 15:51:26,795 INFO L87 Difference]: Start difference. First operand 187 states and 229 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) [2021-11-17 15:51:26,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:51:26,869 INFO L93 Difference]: Finished difference Result 476 states and 582 transitions. [2021-11-17 15:51:26,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-17 15:51:26,869 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 [2021-11-17 15:51:26,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:51:26,871 INFO L225 Difference]: With dead ends: 476 [2021-11-17 15:51:26,871 INFO L226 Difference]: Without dead ends: 293 [2021-11-17 15:51:26,871 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 [2021-11-17 15:51:26,872 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 75 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-17 15:51:26,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 456 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 15:51:26,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-17 15:51:26,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 291. [2021-11-17 15:51:26,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 274 states have (on average 1.197080291970803) internal successors, (328), 285 states have internal predecessors, (328), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-17 15:51:26,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 354 transitions. [2021-11-17 15:51:26,880 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 354 transitions. Word has length 96 [2021-11-17 15:51:26,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:51:26,880 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 354 transitions. [2021-11-17 15:51:26,880 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) [2021-11-17 15:51:26,880 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 354 transitions. [2021-11-17 15:51:26,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-17 15:51:26,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:51:26,881 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] [2021-11-17 15:51:26,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-17 15:51:27,098 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 [2021-11-17 15:51:27,098 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 15:51:27,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:51:27,099 INFO L85 PathProgramCache]: Analyzing trace with hash 2014363869, now seen corresponding path program 1 times [2021-11-17 15:51:27,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:51:27,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365862846] [2021-11-17 15:51:27,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:51:27,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:51:27,111 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:51:27,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [182604079] [2021-11-17 15:51:27,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:51:27,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:51:27,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:51:27,120 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) [2021-11-17 15:51:27,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-17 15:51:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:51:27,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-17 15:51:27,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:51:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-17 15:51:27,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:51:27,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:51:27,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365862846] [2021-11-17 15:51:27,529 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:51:27,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182604079] [2021-11-17 15:51:27,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182604079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:51:27,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:51:27,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-17 15:51:27,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868360851] [2021-11-17 15:51:27,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:51:27,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-17 15:51:27,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:51:27,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-17 15:51:27,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-17 15:51:27,531 INFO L87 Difference]: Start difference. First operand 291 states and 354 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) [2021-11-17 15:51:27,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:51:27,701 INFO L93 Difference]: Finished difference Result 474 states and 579 transitions. [2021-11-17 15:51:27,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-17 15:51:27,702 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 [2021-11-17 15:51:27,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:51:27,703 INFO L225 Difference]: With dead ends: 474 [2021-11-17 15:51:27,703 INFO L226 Difference]: Without dead ends: 231 [2021-11-17 15:51:27,704 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 [2021-11-17 15:51:27,704 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 274 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-17 15:51:27,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 302 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-17 15:51:27,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-17 15:51:27,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2021-11-17 15:51:27,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 219 states have (on average 1.187214611872146) internal successors, (260), 225 states have internal predecessors, (260), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-17 15:51:27,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 276 transitions. [2021-11-17 15:51:27,710 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 276 transitions. Word has length 111 [2021-11-17 15:51:27,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:51:27,710 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 276 transitions. [2021-11-17 15:51:27,710 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) [2021-11-17 15:51:27,711 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 276 transitions. [2021-11-17 15:51:27,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-17 15:51:27,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:51:27,712 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] [2021-11-17 15:51:27,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-17 15:51:27,930 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 [2021-11-17 15:51:27,930 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 15:51:27,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:51:27,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1259218067, now seen corresponding path program 1 times [2021-11-17 15:51:27,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:51:27,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376718815] [2021-11-17 15:51:27,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:51:27,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:51:27,943 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:51:27,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541799905] [2021-11-17 15:51:27,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:51:27,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:51:27,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:51:27,946 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) [2021-11-17 15:51:27,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-17 15:51:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:51:28,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-17 15:51:28,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:51:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:51:28,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:51:28,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:51:28,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376718815] [2021-11-17 15:51:28,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:51:28,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541799905] [2021-11-17 15:51:28,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541799905] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:51:28,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:51:28,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-17 15:51:28,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044630852] [2021-11-17 15:51:28,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:51:28,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-17 15:51:28,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:51:28,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-17 15:51:28,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-17 15:51:28,732 INFO L87 Difference]: Start difference. First operand 231 states and 276 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-17 15:51:28,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:51:28,754 INFO L93 Difference]: Finished difference Result 414 states and 501 transitions. [2021-11-17 15:51:28,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-17 15:51:28,754 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), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 118 [2021-11-17 15:51:28,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:51:28,755 INFO L225 Difference]: With dead ends: 414 [2021-11-17 15:51:28,756 INFO L226 Difference]: Without dead ends: 234 [2021-11-17 15:51:28,756 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 [2021-11-17 15:51:28,757 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 2 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 629 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 [2021-11-17 15:51:28,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 629 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-17 15:51:28,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-17 15:51:28,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2021-11-17 15:51:28,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 221 states have (on average 1.1900452488687783) internal successors, (263), 228 states have internal predecessors, (263), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-17 15:51:28,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 280 transitions. [2021-11-17 15:51:28,763 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 280 transitions. Word has length 118 [2021-11-17 15:51:28,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:51:28,764 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 280 transitions. [2021-11-17 15:51:28,764 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), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-17 15:51:28,764 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 280 transitions. [2021-11-17 15:51:28,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-17 15:51:28,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:51:28,765 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] [2021-11-17 15:51:28,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-17 15:51:28,979 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 [2021-11-17 15:51:28,980 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 15:51:28,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:51:28,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1061160779, now seen corresponding path program 1 times [2021-11-17 15:51:28,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:51:28,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608332403] [2021-11-17 15:51:28,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:51:28,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:51:28,990 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:51:28,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984699687] [2021-11-17 15:51:28,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:51:28,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:51:28,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:51:29,012 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) [2021-11-17 15:51:29,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-17 15:51:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:51:30,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-17 15:51:30,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:51:30,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-17 15:51:30,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-17 15:51:30,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-17 15:51:30,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:51:30,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608332403] [2021-11-17 15:51:30,453 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:51:30,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984699687] [2021-11-17 15:51:30,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984699687] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-17 15:51:30,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-17 15:51:30,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-17 15:51:30,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582477815] [2021-11-17 15:51:30,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-17 15:51:30,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-17 15:51:30,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:51:30,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-17 15:51:30,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-17 15:51:30,454 INFO L87 Difference]: Start difference. First operand 234 states and 280 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) [2021-11-17 15:51:30,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:51:30,538 INFO L93 Difference]: Finished difference Result 428 states and 522 transitions. [2021-11-17 15:51:30,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-17 15:51:30,539 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 [2021-11-17 15:51:30,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:51:30,540 INFO L225 Difference]: With dead ends: 428 [2021-11-17 15:51:30,540 INFO L226 Difference]: Without dead ends: 245 [2021-11-17 15:51:30,540 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 [2021-11-17 15:51:30,541 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 18 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-17 15:51:30,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 839 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-17 15:51:30,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-17 15:51:30,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 243. [2021-11-17 15:51:30,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 229 states have (on average 1.2096069868995634) internal successors, (277), 236 states have internal predecessors, (277), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-17 15:51:30,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 294 transitions. [2021-11-17 15:51:30,546 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 294 transitions. Word has length 120 [2021-11-17 15:51:30,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:51:30,546 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 294 transitions. [2021-11-17 15:51:30,547 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) [2021-11-17 15:51:30,547 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 294 transitions. [2021-11-17 15:51:30,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-17 15:51:30,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:51:30,549 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] [2021-11-17 15:51:30,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-17 15:51:30,769 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 [2021-11-17 15:51:30,770 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 15:51:30,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:51:30,770 INFO L85 PathProgramCache]: Analyzing trace with hash -683453741, now seen corresponding path program 2 times [2021-11-17 15:51:30,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:51:30,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587973218] [2021-11-17 15:51:30,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:51:30,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:51:30,781 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:51:30,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8488172] [2021-11-17 15:51:30,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-17 15:51:30,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:51:30,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:51:30,783 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) [2021-11-17 15:51:30,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-17 15:51:31,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-17 15:51:31,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-17 15:51:31,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-17 15:51:31,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:51:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-17 15:51:31,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-17 15:51:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-17 15:51:31,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:51:31,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587973218] [2021-11-17 15:51:31,583 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:51:31,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8488172] [2021-11-17 15:51:31,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8488172] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-17 15:51:31,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-17 15:51:31,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-11-17 15:51:31,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356033831] [2021-11-17 15:51:31,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-17 15:51:31,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-17 15:51:31,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:51:31,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-17 15:51:31,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-17 15:51:31,584 INFO L87 Difference]: Start difference. First operand 243 states and 294 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) [2021-11-17 15:51:32,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:51:32,070 INFO L93 Difference]: Finished difference Result 448 states and 552 transitions. [2021-11-17 15:51:32,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-17 15:51:32,071 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 [2021-11-17 15:51:32,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:51:32,072 INFO L225 Difference]: With dead ends: 448 [2021-11-17 15:51:32,072 INFO L226 Difference]: Without dead ends: 260 [2021-11-17 15:51:32,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2021-11-17 15:51:32,073 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 50 mSDsluCounter, 1665 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1879 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-17 15:51:32,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1879 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-17 15:51:32,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-17 15:51:32,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 252. [2021-11-17 15:51:32,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 238 states have (on average 1.2142857142857142) internal successors, (289), 245 states have internal predecessors, (289), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-17 15:51:32,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 306 transitions. [2021-11-17 15:51:32,084 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 306 transitions. Word has length 124 [2021-11-17 15:51:32,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:51:32,084 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 306 transitions. [2021-11-17 15:51:32,084 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) [2021-11-17 15:51:32,085 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 306 transitions. [2021-11-17 15:51:32,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-17 15:51:32,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:51:32,086 INFO L514 BasicCegarLoop]: trace histogram [15, 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] [2021-11-17 15:51:32,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-17 15:51:32,304 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 [2021-11-17 15:51:32,305 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 15:51:32,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:51:32,305 INFO L85 PathProgramCache]: Analyzing trace with hash -71339355, now seen corresponding path program 3 times [2021-11-17 15:51:32,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:51:32,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480767431] [2021-11-17 15:51:32,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:51:32,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:51:32,314 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:51:32,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848824611] [2021-11-17 15:51:32,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-17 15:51:32,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:51:32,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:51:32,319 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) [2021-11-17 15:51:32,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process Killed by 15