./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test8-2.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_JEN_test8-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 80f1df6d4bc7961b41bec7d16d328ef23e1639399b1fb3a18bcdda9891a98148 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-17 14:52:35,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-17 14:52:35,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-17 14:52:35,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-17 14:52:35,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-17 14:52:35,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-17 14:52:35,519 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-17 14:52:35,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-17 14:52:35,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-17 14:52:35,532 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-17 14:52:35,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-17 14:52:35,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-17 14:52:35,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-17 14:52:35,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-17 14:52:35,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-17 14:52:35,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-17 14:52:35,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-17 14:52:35,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-17 14:52:35,547 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-17 14:52:35,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-17 14:52:35,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-17 14:52:35,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-17 14:52:35,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-17 14:52:35,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-17 14:52:35,564 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-17 14:52:35,564 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-17 14:52:35,564 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-17 14:52:35,566 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-17 14:52:35,567 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-17 14:52:35,567 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-17 14:52:35,568 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-17 14:52:35,569 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-17 14:52:35,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-17 14:52:35,571 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-17 14:52:35,573 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-17 14:52:35,573 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-17 14:52:35,573 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-17 14:52:35,574 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-17 14:52:35,574 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-17 14:52:35,575 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-17 14:52:35,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-17 14:52:35,577 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-17 14:52:35,612 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-17 14:52:35,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-17 14:52:35,615 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-17 14:52:35,615 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-17 14:52:35,616 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-17 14:52:35,616 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-17 14:52:35,617 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-17 14:52:35,617 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-17 14:52:35,617 INFO L138 SettingsManager]: * Use SBE=true [2021-11-17 14:52:35,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-17 14:52:35,618 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-17 14:52:35,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-17 14:52:35,619 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-17 14:52:35,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-17 14:52:35,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-17 14:52:35,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-17 14:52:35,619 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-17 14:52:35,619 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-17 14:52:35,620 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-17 14:52:35,620 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-17 14:52:35,620 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-17 14:52:35,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-17 14:52:35,620 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-17 14:52:35,621 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-17 14:52:35,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-17 14:52:35,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-17 14:52:35,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-17 14:52:35,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-17 14:52:35,622 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-17 14:52:35,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-17 14:52:35,622 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-17 14:52:35,622 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-17 14:52:35,623 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-17 14:52:35,623 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-17 14:52:35,623 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 80f1df6d4bc7961b41bec7d16d328ef23e1639399b1fb3a18bcdda9891a98148 [2021-11-17 14:52:35,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-17 14:52:35,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-17 14:52:35,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-17 14:52:35,965 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-17 14:52:35,966 INFO L275 PluginConnector]: CDTParser initialized [2021-11-17 14:52:35,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test8-2.i [2021-11-17 14:52:36,042 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d67bce09d/eff6554f46ce4ed89dcd39e0a2dd8c7b/FLAGdc4fb6733 [2021-11-17 14:52:36,757 INFO L306 CDTParser]: Found 1 translation units. [2021-11-17 14:52:36,761 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test8-2.i [2021-11-17 14:52:36,792 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d67bce09d/eff6554f46ce4ed89dcd39e0a2dd8c7b/FLAGdc4fb6733 [2021-11-17 14:52:36,924 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d67bce09d/eff6554f46ce4ed89dcd39e0a2dd8c7b [2021-11-17 14:52:36,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-17 14:52:36,928 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-17 14:52:36,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-17 14:52:36,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-17 14:52:36,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-17 14:52:36,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 02:52:36" (1/1) ... [2021-11-17 14:52:36,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a91e11f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:52:36, skipping insertion in model container [2021-11-17 14:52:36,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 02:52:36" (1/1) ... [2021-11-17 14:52:36,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-17 14:52:37,064 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-17 14:52:37,678 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test8-2.i[33021,33034] [2021-11-17 14:52:37,799 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test8-2.i[45234,45247] [2021-11-17 14:52:37,815 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-17 14:52:37,833 INFO L203 MainTranslator]: Completed pre-run [2021-11-17 14:52:37,873 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test8-2.i[33021,33034] [2021-11-17 14:52:37,942 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test8-2.i[45234,45247] [2021-11-17 14:52:37,949 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-17 14:52:37,983 INFO L208 MainTranslator]: Completed translation [2021-11-17 14:52:37,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:52:37 WrapperNode [2021-11-17 14:52:37,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-17 14:52:37,985 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-17 14:52:37,985 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-17 14:52:37,985 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-17 14:52:37,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:52:37" (1/1) ... [2021-11-17 14:52:38,045 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:52:37" (1/1) ... [2021-11-17 14:52:38,120 INFO L137 Inliner]: procedures = 177, calls = 348, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1151 [2021-11-17 14:52:38,121 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-17 14:52:38,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-17 14:52:38,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-17 14:52:38,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-17 14:52:38,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:52:37" (1/1) ... [2021-11-17 14:52:38,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:52:37" (1/1) ... [2021-11-17 14:52:38,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:52:37" (1/1) ... [2021-11-17 14:52:38,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:52:37" (1/1) ... [2021-11-17 14:52:38,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:52:37" (1/1) ... [2021-11-17 14:52:38,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:52:37" (1/1) ... [2021-11-17 14:52:38,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:52:37" (1/1) ... [2021-11-17 14:52:38,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-17 14:52:38,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-17 14:52:38,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-17 14:52:38,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-17 14:52:38,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:52:37" (1/1) ... [2021-11-17 14:52:38,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-17 14:52:38,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 14:52:38,313 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 14:52:38,321 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 14:52:38,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-17 14:52:38,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-17 14:52:38,357 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-17 14:52:38,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-17 14:52:38,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-17 14:52:38,360 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-17 14:52:38,360 INFO L130 BoogieDeclarations]: Found specification of procedure test_int [2021-11-17 14:52:38,360 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int [2021-11-17 14:52:38,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-17 14:52:38,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-17 14:52:38,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-17 14:52:38,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-17 14:52:38,361 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-17 14:52:38,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-17 14:52:38,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-17 14:52:38,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-17 14:52:38,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-17 14:52:38,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-17 14:52:38,599 INFO L236 CfgBuilder]: Building ICFG [2021-11-17 14:52:38,600 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-17 14:52:39,735 INFO L277 CfgBuilder]: Performing block encoding [2021-11-17 14:52:39,747 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-17 14:52:39,747 INFO L301 CfgBuilder]: Removed 71 assume(true) statements. [2021-11-17 14:52:39,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 02:52:39 BoogieIcfgContainer [2021-11-17 14:52:39,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-17 14:52:39,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-17 14:52:39,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-17 14:52:39,758 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-17 14:52:39,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 02:52:36" (1/3) ... [2021-11-17 14:52:39,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a7be8a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 02:52:39, skipping insertion in model container [2021-11-17 14:52:39,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:52:37" (2/3) ... [2021-11-17 14:52:39,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a7be8a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 02:52:39, skipping insertion in model container [2021-11-17 14:52:39,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 02:52:39" (3/3) ... [2021-11-17 14:52:39,762 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_JEN_test8-2.i [2021-11-17 14:52:39,767 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-17 14:52:39,767 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-17 14:52:39,808 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-17 14:52:39,815 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 14:52:39,816 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-17 14:52:39,843 INFO L276 IsEmpty]: Start isEmpty. Operand has 255 states, 229 states have (on average 1.6943231441048034) internal successors, (388), 246 states have internal predecessors, (388), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 6 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-17 14:52:39,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-17 14:52:39,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 14:52:39,850 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 14:52:39,851 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 14:52:39,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 14:52:39,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1334755327, now seen corresponding path program 1 times [2021-11-17 14:52:39,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 14:52:39,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114484484] [2021-11-17 14:52:39,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:52:39,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 14:52:39,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 14:52:40,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 14:52:40,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 14:52:40,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114484484] [2021-11-17 14:52:40,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114484484] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 14:52:40,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 14:52:40,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-17 14:52:40,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172732537] [2021-11-17 14:52:40,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 14:52:40,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-17 14:52:40,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 14:52:40,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-17 14:52:40,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-17 14:52:40,076 INFO L87 Difference]: Start difference. First operand has 255 states, 229 states have (on average 1.6943231441048034) internal successors, (388), 246 states have internal predecessors, (388), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 6 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 14:52:40,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 14:52:40,168 INFO L93 Difference]: Finished difference Result 508 states and 871 transitions. [2021-11-17 14:52:40,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-17 14:52:40,171 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 14:52:40,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 14:52:40,198 INFO L225 Difference]: With dead ends: 508 [2021-11-17 14:52:40,199 INFO L226 Difference]: Without dead ends: 222 [2021-11-17 14:52:40,207 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 14:52:40,212 INFO L933 BasicCegarLoop]: 351 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-17 14:52:40,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-17 14:52:40,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-17 14:52:40,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2021-11-17 14:52:40,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 197 states have (on average 1.3553299492385786) internal successors, (267), 213 states have internal predecessors, (267), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 6 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-17 14:52:40,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 307 transitions. [2021-11-17 14:52:40,290 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 307 transitions. Word has length 9 [2021-11-17 14:52:40,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 14:52:40,291 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 307 transitions. [2021-11-17 14:52:40,292 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 14:52:40,292 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 307 transitions. [2021-11-17 14:52:40,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-17 14:52:40,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 14:52:40,296 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 14:52:40,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-17 14:52:40,296 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 14:52:40,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 14:52:40,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1790395171, now seen corresponding path program 1 times [2021-11-17 14:52:40,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 14:52:40,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465495537] [2021-11-17 14:52:40,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:52:40,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 14:52:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 14:52:40,419 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 14:52:40,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 14:52:40,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465495537] [2021-11-17 14:52:40,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465495537] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 14:52:40,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 14:52:40,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-17 14:52:40,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778949524] [2021-11-17 14:52:40,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 14:52:40,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-17 14:52:40,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 14:52:40,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-17 14:52:40,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-17 14:52:40,424 INFO L87 Difference]: Start difference. First operand 222 states and 307 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 14:52:40,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 14:52:40,772 INFO L93 Difference]: Finished difference Result 463 states and 642 transitions. [2021-11-17 14:52:40,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-17 14:52:40,773 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 14:52:40,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 14:52:40,775 INFO L225 Difference]: With dead ends: 463 [2021-11-17 14:52:40,775 INFO L226 Difference]: Without dead ends: 338 [2021-11-17 14:52:40,777 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 14:52:40,778 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 143 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-17 14:52:40,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 782 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-17 14:52:40,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-11-17 14:52:40,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 224. [2021-11-17 14:52:40,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 199 states have (on average 1.3517587939698492) internal successors, (269), 215 states have internal predecessors, (269), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 6 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-17 14:52:40,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 309 transitions. [2021-11-17 14:52:40,800 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 309 transitions. Word has length 44 [2021-11-17 14:52:40,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 14:52:40,806 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 309 transitions. [2021-11-17 14:52:40,806 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 14:52:40,807 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 309 transitions. [2021-11-17 14:52:40,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-17 14:52:40,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 14:52:40,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 14:52:40,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-17 14:52:40,813 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 14:52:40,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 14:52:40,814 INFO L85 PathProgramCache]: Analyzing trace with hash -342228401, now seen corresponding path program 1 times [2021-11-17 14:52:40,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 14:52:40,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127892254] [2021-11-17 14:52:40,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:52:40,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 14:52:40,855 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 14:52:40,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976404634] [2021-11-17 14:52:40,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:52:40,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 14:52:40,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 14:52:40,858 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 14:52:40,860 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 14:52:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 14:52:41,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-17 14:52:41,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 14:52:41,177 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 14:52:41,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 14:52:41,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 14:52:41,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127892254] [2021-11-17 14:52:41,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 14:52:41,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976404634] [2021-11-17 14:52:41,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976404634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 14:52:41,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 14:52:41,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-17 14:52:41,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3468329] [2021-11-17 14:52:41,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 14:52:41,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-17 14:52:41,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 14:52:41,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-17 14:52:41,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 14:52:41,181 INFO L87 Difference]: Start difference. First operand 224 states and 309 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 14:52:41,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 14:52:41,274 INFO L93 Difference]: Finished difference Result 465 states and 645 transitions. [2021-11-17 14:52:41,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-17 14:52:41,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-17 14:52:41,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 14:52:41,277 INFO L225 Difference]: With dead ends: 465 [2021-11-17 14:52:41,277 INFO L226 Difference]: Without dead ends: 245 [2021-11-17 14:52:41,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 14:52:41,281 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 9 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-17 14:52:41,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 559 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 14:52:41,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-17 14:52:41,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 244. [2021-11-17 14:52:41,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 219 states have (on average 1.3196347031963471) internal successors, (289), 235 states have internal predecessors, (289), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 6 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-17 14:52:41,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 329 transitions. [2021-11-17 14:52:41,308 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 329 transitions. Word has length 61 [2021-11-17 14:52:41,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 14:52:41,309 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 329 transitions. [2021-11-17 14:52:41,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 14:52:41,310 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 329 transitions. [2021-11-17 14:52:41,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-17 14:52:41,316 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 14:52:41,316 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 14:52:41,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-17 14:52:41,529 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 14:52:41,530 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 14:52:41,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 14:52:41,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1749706579, now seen corresponding path program 1 times [2021-11-17 14:52:41,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 14:52:41,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346231792] [2021-11-17 14:52:41,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:52:41,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 14:52:41,546 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 14:52:41,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671868298] [2021-11-17 14:52:41,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:52:41,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 14:52:41,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 14:52:41,548 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 14:52:41,553 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 14:52:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 14:52:41,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-17 14:52:41,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 14:52:41,853 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 14:52:41,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 14:52:41,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 14:52:41,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346231792] [2021-11-17 14:52:41,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 14:52:41,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671868298] [2021-11-17 14:52:41,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671868298] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 14:52:41,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 14:52:41,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-17 14:52:41,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110408342] [2021-11-17 14:52:41,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 14:52:41,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-17 14:52:41,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 14:52:41,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-17 14:52:41,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-17 14:52:41,860 INFO L87 Difference]: Start difference. First operand 244 states and 329 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 14:52:41,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 14:52:41,949 INFO L93 Difference]: Finished difference Result 476 states and 646 transitions. [2021-11-17 14:52:41,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-17 14:52:41,950 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-17 14:52:41,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 14:52:41,953 INFO L225 Difference]: With dead ends: 476 [2021-11-17 14:52:41,953 INFO L226 Difference]: Without dead ends: 236 [2021-11-17 14:52:41,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-17 14:52:41,956 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 213 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-17 14:52:41,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 647 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 14:52:41,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-17 14:52:41,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 230. [2021-11-17 14:52:41,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 205 states have (on average 1.3073170731707318) internal successors, (268), 221 states have internal predecessors, (268), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 6 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-17 14:52:41,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 308 transitions. [2021-11-17 14:52:41,971 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 308 transitions. Word has length 61 [2021-11-17 14:52:41,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 14:52:41,971 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 308 transitions. [2021-11-17 14:52:41,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 14:52:41,971 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 308 transitions. [2021-11-17 14:52:41,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-17 14:52:41,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 14:52:41,975 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 14:52:42,005 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 14:52:42,195 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 14:52:42,196 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 14:52:42,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 14:52:42,196 INFO L85 PathProgramCache]: Analyzing trace with hash 933653125, now seen corresponding path program 1 times [2021-11-17 14:52:42,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 14:52:42,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292576081] [2021-11-17 14:52:42,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:52:42,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 14:52:42,220 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 14:52:42,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026570472] [2021-11-17 14:52:42,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:52:42,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 14:52:42,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 14:52:42,225 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 14:52:42,279 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 14:52:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 14:52:42,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-17 14:52:42,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 14:52:42,732 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 14:52:42,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 14:52:42,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 14:52:42,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292576081] [2021-11-17 14:52:42,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 14:52:42,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026570472] [2021-11-17 14:52:42,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026570472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 14:52:42,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 14:52:42,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-17 14:52:42,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988511542] [2021-11-17 14:52:42,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 14:52:42,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-17 14:52:42,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 14:52:42,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-17 14:52:42,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 14:52:42,736 INFO L87 Difference]: Start difference. First operand 230 states and 308 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 14:52:42,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 14:52:42,822 INFO L93 Difference]: Finished difference Result 567 states and 751 transitions. [2021-11-17 14:52:42,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-17 14:52:42,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-17 14:52:42,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 14:52:42,824 INFO L225 Difference]: With dead ends: 567 [2021-11-17 14:52:42,825 INFO L226 Difference]: Without dead ends: 341 [2021-11-17 14:52:42,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 14:52:42,826 INFO L933 BasicCegarLoop]: 344 mSDtfsCounter, 98 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-17 14:52:42,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 616 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 14:52:42,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-11-17 14:52:42,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 338. [2021-11-17 14:52:42,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 312 states have (on average 1.2852564102564104) internal successors, (401), 328 states have internal predecessors, (401), 21 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 7 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-17 14:52:42,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 443 transitions. [2021-11-17 14:52:42,837 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 443 transitions. Word has length 61 [2021-11-17 14:52:42,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 14:52:42,838 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 443 transitions. [2021-11-17 14:52:42,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 14:52:42,838 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 443 transitions. [2021-11-17 14:52:42,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-17 14:52:42,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 14:52:42,839 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 14:52:42,867 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 14:52:43,059 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 14:52:43,060 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 14:52:43,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 14:52:43,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1452917895, now seen corresponding path program 1 times [2021-11-17 14:52:43,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 14:52:43,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598160070] [2021-11-17 14:52:43,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:52:43,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 14:52:43,082 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 14:52:43,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648325191] [2021-11-17 14:52:43,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:52:43,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 14:52:43,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 14:52:43,085 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 14:52:43,086 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 14:52:43,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 14:52:43,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-17 14:52:43,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 14:52:43,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-17 14:52:43,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 14:52:43,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 14:52:43,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598160070] [2021-11-17 14:52:43,513 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 14:52:43,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648325191] [2021-11-17 14:52:43,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648325191] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 14:52:43,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 14:52:43,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-17 14:52:43,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400424919] [2021-11-17 14:52:43,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 14:52:43,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-17 14:52:43,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 14:52:43,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-17 14:52:43,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-17 14:52:43,517 INFO L87 Difference]: Start difference. First operand 338 states and 443 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-17 14:52:43,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 14:52:43,556 INFO L93 Difference]: Finished difference Result 631 states and 839 transitions. [2021-11-17 14:52:43,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-17 14:52:43,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 76 [2021-11-17 14:52:43,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 14:52:43,560 INFO L225 Difference]: With dead ends: 631 [2021-11-17 14:52:43,560 INFO L226 Difference]: Without dead ends: 341 [2021-11-17 14:52:43,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-17 14:52:43,562 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 2 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-17 14:52:43,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 887 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-17 14:52:43,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-11-17 14:52:43,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 341. [2021-11-17 14:52:43,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 314 states have (on average 1.286624203821656) internal successors, (404), 331 states have internal predecessors, (404), 21 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (22), 7 states have call predecessors, (22), 21 states have call successors, (22) [2021-11-17 14:52:43,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 447 transitions. [2021-11-17 14:52:43,578 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 447 transitions. Word has length 76 [2021-11-17 14:52:43,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 14:52:43,579 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 447 transitions. [2021-11-17 14:52:43,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-17 14:52:43,579 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 447 transitions. [2021-11-17 14:52:43,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-17 14:52:43,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 14:52:43,581 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 14:52:43,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-17 14:52:43,803 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 14:52:43,803 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 14:52:43,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 14:52:43,804 INFO L85 PathProgramCache]: Analyzing trace with hash -975375717, now seen corresponding path program 1 times [2021-11-17 14:52:43,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 14:52:43,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150812403] [2021-11-17 14:52:43,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:52:43,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 14:52:43,831 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 14:52:43,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1761529943] [2021-11-17 14:52:43,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:52:43,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 14:52:43,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 14:52:43,836 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 14:52:43,853 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 14:52:44,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 14:52:44,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-17 14:52:44,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 14:52:44,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-17 14:52:44,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-17 14:52:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-17 14:52:44,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 14:52:44,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150812403] [2021-11-17 14:52:44,685 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 14:52:44,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761529943] [2021-11-17 14:52:44,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761529943] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-17 14:52:44,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-17 14:52:44,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-17 14:52:44,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144011847] [2021-11-17 14:52:44,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-17 14:52:44,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-17 14:52:44,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 14:52:44,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-17 14:52:44,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-17 14:52:44,687 INFO L87 Difference]: Start difference. First operand 341 states and 447 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-17 14:52:44,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 14:52:44,829 INFO L93 Difference]: Finished difference Result 645 states and 860 transitions. [2021-11-17 14:52:44,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-17 14:52:44,830 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 78 [2021-11-17 14:52:44,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 14:52:44,832 INFO L225 Difference]: With dead ends: 645 [2021-11-17 14:52:44,832 INFO L226 Difference]: Without dead ends: 352 [2021-11-17 14:52:44,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 148 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 14:52:44,833 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 17 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-17 14:52:44,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 892 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 14:52:44,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-17 14:52:44,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 350. [2021-11-17 14:52:44,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 322 states have (on average 1.2981366459627328) internal successors, (418), 339 states have internal predecessors, (418), 21 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (22), 7 states have call predecessors, (22), 21 states have call successors, (22) [2021-11-17 14:52:44,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 461 transitions. [2021-11-17 14:52:44,844 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 461 transitions. Word has length 78 [2021-11-17 14:52:44,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 14:52:44,845 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 461 transitions. [2021-11-17 14:52:44,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-17 14:52:44,845 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 461 transitions. [2021-11-17 14:52:44,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-17 14:52:44,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 14:52:44,846 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 14:52:44,875 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 14:52:45,071 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 14:52:45,072 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 14:52:45,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 14:52:45,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1737208967, now seen corresponding path program 2 times [2021-11-17 14:52:45,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 14:52:45,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829948154] [2021-11-17 14:52:45,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:52:45,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 14:52:45,086 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 14:52:45,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [234658787] [2021-11-17 14:52:45,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-17 14:52:45,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 14:52:45,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 14:52:45,088 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 14:52:45,112 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 14:53:03,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-17 14:53:03,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-17 14:53:03,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-17 14:53:03,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 14:53:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-17 14:53:03,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-17 14:53:03,933 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-17 14:53:03,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 14:53:03,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829948154] [2021-11-17 14:53:03,933 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 14:53:03,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234658787] [2021-11-17 14:53:03,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234658787] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-17 14:53:03,934 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-17 14:53:03,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2021-11-17 14:53:03,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321967823] [2021-11-17 14:53:03,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-17 14:53:03,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-17 14:53:03,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 14:53:03,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-17 14:53:03,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-11-17 14:53:03,935 INFO L87 Difference]: Start difference. First operand 350 states and 461 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-17 14:53:04,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 14:53:04,365 INFO L93 Difference]: Finished difference Result 704 states and 937 transitions. [2021-11-17 14:53:04,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-17 14:53:04,366 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 82 [2021-11-17 14:53:04,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 14:53:04,369 INFO L225 Difference]: With dead ends: 704 [2021-11-17 14:53:04,369 INFO L226 Difference]: Without dead ends: 359 [2021-11-17 14:53:04,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-11-17 14:53:04,371 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 256 mSDsluCounter, 2370 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 2660 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-17 14:53:04,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 2660 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-17 14:53:04,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-11-17 14:53:04,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 350. [2021-11-17 14:53:04,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 322 states have (on average 1.2981366459627328) internal successors, (418), 339 states have internal predecessors, (418), 21 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (22), 7 states have call predecessors, (22), 21 states have call successors, (22) [2021-11-17 14:53:04,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 461 transitions. [2021-11-17 14:53:04,385 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 461 transitions. Word has length 82 [2021-11-17 14:53:04,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 14:53:04,386 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 461 transitions. [2021-11-17 14:53:04,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-17 14:53:04,386 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 461 transitions. [2021-11-17 14:53:04,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-17 14:53:04,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 14:53:04,387 INFO L514 BasicCegarLoop]: trace histogram [12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 14:53:04,418 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 14:53:04,588 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 14:53:04,588 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 14:53:04,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 14:53:04,589 INFO L85 PathProgramCache]: Analyzing trace with hash -184704007, now seen corresponding path program 3 times [2021-11-17 14:53:04,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 14:53:04,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562932196] [2021-11-17 14:53:04,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 14:53:04,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 14:53:04,600 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 14:53:04,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401912946] [2021-11-17 14:53:04,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-17 14:53:04,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 14:53:04,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 14:53:04,602 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 14:53:04,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process Killed by 15