./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.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_SAX_test6-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ff5be3465740cb655882704e7eef418c95d0bbd56a2060e741c7d3e996e58af7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-17 15:36:26,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-17 15:36:26,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-17 15:36:26,695 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-17 15:36:26,695 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-17 15:36:26,698 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-17 15:36:26,700 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-17 15:36:26,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-17 15:36:26,706 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-17 15:36:26,711 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-17 15:36:26,712 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-17 15:36:26,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-17 15:36:26,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-17 15:36:26,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-17 15:36:26,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-17 15:36:26,717 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-17 15:36:26,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-17 15:36:26,718 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-17 15:36:26,722 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-17 15:36:26,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-17 15:36:26,727 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-17 15:36:26,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-17 15:36:26,728 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-17 15:36:26,729 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-17 15:36:26,732 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-17 15:36:26,732 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-17 15:36:26,732 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-17 15:36:26,733 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-17 15:36:26,734 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-17 15:36:26,734 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-17 15:36:26,734 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-17 15:36:26,735 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-17 15:36:26,736 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-17 15:36:26,737 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-17 15:36:26,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-17 15:36:26,738 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-17 15:36:26,738 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-17 15:36:26,738 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-17 15:36:26,738 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-17 15:36:26,739 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-17 15:36:26,739 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-17 15:36:26,741 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-17 15:36:26,768 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-17 15:36:26,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-17 15:36:26,768 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-17 15:36:26,768 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-17 15:36:26,769 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-17 15:36:26,769 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-17 15:36:26,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-17 15:36:26,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-17 15:36:26,770 INFO L138 SettingsManager]: * Use SBE=true [2021-11-17 15:36:26,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-17 15:36:26,771 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-17 15:36:26,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-17 15:36:26,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-17 15:36:26,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-17 15:36:26,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-17 15:36:26,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-17 15:36:26,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-17 15:36:26,772 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-17 15:36:26,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-17 15:36:26,772 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-17 15:36:26,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-17 15:36:26,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-17 15:36:26,772 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-17 15:36:26,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-17 15:36:26,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-17 15:36:26,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-17 15:36:26,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-17 15:36:26,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-17 15:36:26,773 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-17 15:36:26,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-17 15:36:26,774 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-17 15:36:26,774 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-17 15:36:26,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-17 15:36:26,774 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-17 15:36:26,774 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff5be3465740cb655882704e7eef418c95d0bbd56a2060e741c7d3e996e58af7 [2021-11-17 15:36:26,955 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-17 15:36:26,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-17 15:36:26,971 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-17 15:36:26,972 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-17 15:36:26,972 INFO L275 PluginConnector]: CDTParser initialized [2021-11-17 15:36:26,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i [2021-11-17 15:36:27,019 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be6a7a8c1/8bb023ed42ac46b8b54d033b113d4ecf/FLAG36161d86f [2021-11-17 15:36:27,483 INFO L306 CDTParser]: Found 1 translation units. [2021-11-17 15:36:27,483 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i [2021-11-17 15:36:27,498 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be6a7a8c1/8bb023ed42ac46b8b54d033b113d4ecf/FLAG36161d86f [2021-11-17 15:36:27,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be6a7a8c1/8bb023ed42ac46b8b54d033b113d4ecf [2021-11-17 15:36:27,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-17 15:36:27,801 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-17 15:36:27,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-17 15:36:27,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-17 15:36:27,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-17 15:36:27,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:36:27" (1/1) ... [2021-11-17 15:36:27,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47771bd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:27, skipping insertion in model container [2021-11-17 15:36:27,807 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:36:27" (1/1) ... [2021-11-17 15:36:27,812 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-17 15:36:27,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-17 15:36:28,239 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i[44118,44131] [2021-11-17 15:36:28,254 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i[44660,44673] [2021-11-17 15:36:28,350 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i[56247,56260] [2021-11-17 15:36:28,351 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i[56368,56381] [2021-11-17 15:36:28,357 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-17 15:36:28,364 INFO L203 MainTranslator]: Completed pre-run [2021-11-17 15:36:28,381 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i[44118,44131] [2021-11-17 15:36:28,383 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i[44660,44673] [2021-11-17 15:36:28,433 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i[56247,56260] [2021-11-17 15:36:28,434 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i[56368,56381] [2021-11-17 15:36:28,444 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-17 15:36:28,479 INFO L208 MainTranslator]: Completed translation [2021-11-17 15:36:28,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:28 WrapperNode [2021-11-17 15:36:28,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-17 15:36:28,481 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-17 15:36:28,481 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-17 15:36:28,481 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-17 15:36:28,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:28" (1/1) ... [2021-11-17 15:36:28,513 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:28" (1/1) ... [2021-11-17 15:36:28,556 INFO L137 Inliner]: procedures = 282, calls = 294, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 1039 [2021-11-17 15:36:28,557 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-17 15:36:28,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-17 15:36:28,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-17 15:36:28,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-17 15:36:28,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:28" (1/1) ... [2021-11-17 15:36:28,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:28" (1/1) ... [2021-11-17 15:36:28,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:28" (1/1) ... [2021-11-17 15:36:28,573 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:28" (1/1) ... [2021-11-17 15:36:28,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:28" (1/1) ... [2021-11-17 15:36:28,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:28" (1/1) ... [2021-11-17 15:36:28,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:28" (1/1) ... [2021-11-17 15:36:28,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-17 15:36:28,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-17 15:36:28,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-17 15:36:28,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-17 15:36:28,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:28" (1/1) ... [2021-11-17 15:36:28,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-17 15:36:28,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:36:28,669 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-17 15:36:28,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-17 15:36:28,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-17 15:36:28,696 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-17 15:36:28,696 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-17 15:36:28,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-17 15:36:28,697 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2021-11-17 15:36:28,697 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2021-11-17 15:36:28,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-17 15:36:28,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-17 15:36:28,697 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-17 15:36:28,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-17 15:36:28,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-17 15:36:28,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-17 15:36:28,698 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2021-11-17 15:36:28,698 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2021-11-17 15:36:28,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-17 15:36:28,698 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2021-11-17 15:36:28,698 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2021-11-17 15:36:28,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-17 15:36:28,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-17 15:36:28,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-17 15:36:28,854 INFO L236 CfgBuilder]: Building ICFG [2021-11-17 15:36:28,856 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-17 15:36:29,523 INFO L277 CfgBuilder]: Performing block encoding [2021-11-17 15:36:29,528 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-17 15:36:29,529 INFO L301 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-17 15:36:29,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:36:29 BoogieIcfgContainer [2021-11-17 15:36:29,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-17 15:36:29,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-17 15:36:29,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-17 15:36:29,535 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-17 15:36:29,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:36:27" (1/3) ... [2021-11-17 15:36:29,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d72c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:36:29, skipping insertion in model container [2021-11-17 15:36:29,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:28" (2/3) ... [2021-11-17 15:36:29,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d72c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:36:29, skipping insertion in model container [2021-11-17 15:36:29,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:36:29" (3/3) ... [2021-11-17 15:36:29,537 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test6-1.i [2021-11-17 15:36:29,540 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-17 15:36:29,541 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-17 15:36:29,574 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-17 15:36:29,579 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-17 15:36:29,580 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-17 15:36:29,605 INFO L276 IsEmpty]: Start isEmpty. Operand has 225 states, 203 states have (on average 1.6354679802955665) internal successors, (332), 207 states have internal predecessors, (332), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-17 15:36:29,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-17 15:36:29,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:36:29,609 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:36:29,610 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:36:29,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:36:29,618 INFO L85 PathProgramCache]: Analyzing trace with hash -720802776, now seen corresponding path program 1 times [2021-11-17 15:36:29,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:36:29,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481934442] [2021-11-17 15:36:29,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:36:29,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:36:29,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:36:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:36:29,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:36:29,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481934442] [2021-11-17 15:36:29,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481934442] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:36:29,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:36:29,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-17 15:36:29,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069674384] [2021-11-17 15:36:29,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:36:29,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-17 15:36:29,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:36:29,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-17 15:36:29,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-17 15:36:29,767 INFO L87 Difference]: Start difference. First operand has 225 states, 203 states have (on average 1.6354679802955665) internal successors, (332), 207 states have internal predecessors, (332), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 15:36:29,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:36:29,804 INFO L93 Difference]: Finished difference Result 445 states and 724 transitions. [2021-11-17 15:36:29,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-17 15:36:29,806 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2021-11-17 15:36:29,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:36:29,815 INFO L225 Difference]: With dead ends: 445 [2021-11-17 15:36:29,815 INFO L226 Difference]: Without dead ends: 218 [2021-11-17 15:36:29,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-17 15:36:29,820 INFO L933 BasicCegarLoop]: 285 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, 285 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-17 15:36:29,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-17 15:36:29,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-17 15:36:29,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2021-11-17 15:36:29,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 197 states have (on average 1.299492385786802) internal successors, (256), 202 states have internal predecessors, (256), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-17 15:36:29,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 281 transitions. [2021-11-17 15:36:29,856 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 281 transitions. Word has length 8 [2021-11-17 15:36:29,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:36:29,856 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 281 transitions. [2021-11-17 15:36:29,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 15:36:29,857 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 281 transitions. [2021-11-17 15:36:29,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-17 15:36:29,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:36:29,857 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:36:29,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-17 15:36:29,858 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:36:29,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:36:29,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1810590275, now seen corresponding path program 1 times [2021-11-17 15:36:29,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:36:29,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846224265] [2021-11-17 15:36:29,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:36:29,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:36:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:36:29,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:36:29,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:36:29,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846224265] [2021-11-17 15:36:29,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846224265] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:36:29,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:36:29,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-17 15:36:29,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963116719] [2021-11-17 15:36:29,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:36:29,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-17 15:36:29,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:36:29,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-17 15:36:29,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-17 15:36:29,909 INFO L87 Difference]: Start difference. First operand 218 states and 281 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 15:36:30,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:36:30,232 INFO L93 Difference]: Finished difference Result 455 states and 590 transitions. [2021-11-17 15:36:30,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-17 15:36:30,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-11-17 15:36:30,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:36:30,235 INFO L225 Difference]: With dead ends: 455 [2021-11-17 15:36:30,235 INFO L226 Difference]: Without dead ends: 346 [2021-11-17 15:36:30,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-17 15:36:30,237 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 152 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-17 15:36:30,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 716 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-17 15:36:30,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-11-17 15:36:30,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 220. [2021-11-17 15:36:30,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 199 states have (on average 1.2964824120603016) internal successors, (258), 204 states have internal predecessors, (258), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-17 15:36:30,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 283 transitions. [2021-11-17 15:36:30,250 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 283 transitions. Word has length 10 [2021-11-17 15:36:30,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:36:30,251 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 283 transitions. [2021-11-17 15:36:30,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 15:36:30,251 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 283 transitions. [2021-11-17 15:36:30,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-17 15:36:30,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:36:30,252 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] [2021-11-17 15:36:30,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-17 15:36:30,253 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:36:30,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:36:30,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1082818915, now seen corresponding path program 1 times [2021-11-17 15:36:30,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:36:30,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708858103] [2021-11-17 15:36:30,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:36:30,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:36:30,270 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:36:30,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1915206735] [2021-11-17 15:36:30,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:36:30,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:36:30,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:36:30,272 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-17 15:36:30,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-17 15:36:30,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:36:30,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-17 15:36:30,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:36:30,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:36:30,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:36:30,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:36:30,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708858103] [2021-11-17 15:36:30,518 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:36:30,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915206735] [2021-11-17 15:36:30,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915206735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:36:30,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:36:30,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-17 15:36:30,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847144450] [2021-11-17 15:36:30,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:36:30,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-17 15:36:30,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:36:30,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-17 15:36:30,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 15:36:30,520 INFO L87 Difference]: Start difference. First operand 220 states and 283 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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 15:36:30,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:36:30,569 INFO L93 Difference]: Finished difference Result 457 states and 593 transitions. [2021-11-17 15:36:30,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-17 15:36:30,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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 47 [2021-11-17 15:36:30,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:36:30,571 INFO L225 Difference]: With dead ends: 457 [2021-11-17 15:36:30,571 INFO L226 Difference]: Without dead ends: 241 [2021-11-17 15:36:30,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 15:36:30,573 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 9 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-17 15:36:30,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 507 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-17 15:36:30,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-17 15:36:30,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 240. [2021-11-17 15:36:30,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 219 states have (on average 1.269406392694064) internal successors, (278), 224 states have internal predecessors, (278), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-17 15:36:30,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 303 transitions. [2021-11-17 15:36:30,583 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 303 transitions. Word has length 47 [2021-11-17 15:36:30,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:36:30,583 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 303 transitions. [2021-11-17 15:36:30,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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 15:36:30,584 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 303 transitions. [2021-11-17 15:36:30,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-17 15:36:30,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:36:30,585 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] [2021-11-17 15:36:30,603 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 15:36:30,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:36:30,803 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:36:30,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:36:30,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1223367525, now seen corresponding path program 1 times [2021-11-17 15:36:30,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:36:30,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754507571] [2021-11-17 15:36:30,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:36:30,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:36:30,818 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:36:30,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [718466997] [2021-11-17 15:36:30,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:36:30,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:36:30,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:36:30,838 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-17 15:36:30,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-17 15:36:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:36:31,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-17 15:36:31,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:36:31,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:36:31,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:36:31,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:36:31,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754507571] [2021-11-17 15:36:31,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:36:31,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718466997] [2021-11-17 15:36:31,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718466997] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:36:31,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:36:31,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-17 15:36:31,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25839052] [2021-11-17 15:36:31,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:36:31,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-17 15:36:31,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:36:31,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-17 15:36:31,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-17 15:36:31,108 INFO L87 Difference]: Start difference. First operand 240 states and 303 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 15:36:31,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:36:31,163 INFO L93 Difference]: Finished difference Result 469 states and 595 transitions. [2021-11-17 15:36:31,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-17 15:36:31,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 47 [2021-11-17 15:36:31,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:36:31,165 INFO L225 Difference]: With dead ends: 469 [2021-11-17 15:36:31,165 INFO L226 Difference]: Without dead ends: 233 [2021-11-17 15:36:31,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-17 15:36:31,167 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 223 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-17 15:36:31,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 556 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-17 15:36:31,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-17 15:36:31,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2021-11-17 15:36:31,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 205 states have (on average 1.2536585365853659) internal successors, (257), 210 states have internal predecessors, (257), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-17 15:36:31,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 282 transitions. [2021-11-17 15:36:31,174 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 282 transitions. Word has length 47 [2021-11-17 15:36:31,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:36:31,174 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 282 transitions. [2021-11-17 15:36:31,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 15:36:31,174 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 282 transitions. [2021-11-17 15:36:31,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-17 15:36:31,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:36:31,175 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] [2021-11-17 15:36:31,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-17 15:36:31,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-17 15:36:31,397 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:36:31,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:36:31,398 INFO L85 PathProgramCache]: Analyzing trace with hash 206381993, now seen corresponding path program 1 times [2021-11-17 15:36:31,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:36:31,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057602420] [2021-11-17 15:36:31,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:36:31,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:36:31,409 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:36:31,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873815399] [2021-11-17 15:36:31,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:36:31,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:36:31,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:36:31,416 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-17 15:36:31,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-17 15:36:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:36:31,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-17 15:36:31,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:36:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:36:31,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:36:31,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:36:31,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057602420] [2021-11-17 15:36:31,662 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:36:31,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873815399] [2021-11-17 15:36:31,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873815399] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:36:31,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:36:31,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-17 15:36:31,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155164047] [2021-11-17 15:36:31,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:36:31,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-17 15:36:31,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:36:31,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-17 15:36:31,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-17 15:36:31,664 INFO L87 Difference]: Start difference. First operand 226 states and 282 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (2), 2 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 15:36:31,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:36:31,700 INFO L93 Difference]: Finished difference Result 238 states and 294 transitions. [2021-11-17 15:36:31,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-17 15:36:31,700 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (2), 2 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 47 [2021-11-17 15:36:31,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:36:31,701 INFO L225 Difference]: With dead ends: 238 [2021-11-17 15:36:31,702 INFO L226 Difference]: Without dead ends: 236 [2021-11-17 15:36:31,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-17 15:36:31,703 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 13 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1339 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-17 15:36:31,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 1339 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-17 15:36:31,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-17 15:36:31,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-11-17 15:36:31,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 212 states have (on average 1.25) internal successors, (265), 218 states have internal predecessors, (265), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-17 15:36:31,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 292 transitions. [2021-11-17 15:36:31,710 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 292 transitions. Word has length 47 [2021-11-17 15:36:31,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:36:31,710 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 292 transitions. [2021-11-17 15:36:31,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (2), 2 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 15:36:31,710 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 292 transitions. [2021-11-17 15:36:31,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-17 15:36:31,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:36:31,712 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] [2021-11-17 15:36:31,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-17 15:36:31,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:36:31,930 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:36:31,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:36:31,930 INFO L85 PathProgramCache]: Analyzing trace with hash -806940807, now seen corresponding path program 1 times [2021-11-17 15:36:31,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:36:31,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790266561] [2021-11-17 15:36:31,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:36:31,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:36:31,948 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:36:31,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456061342] [2021-11-17 15:36:31,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:36:31,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:36:31,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:36:31,969 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-17 15:36:31,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-17 15:36:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:36:32,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-17 15:36:32,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:36:32,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:36:32,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:36:32,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:36:32,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790266561] [2021-11-17 15:36:32,195 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:36:32,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456061342] [2021-11-17 15:36:32,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456061342] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:36:32,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:36:32,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-17 15:36:32,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247843936] [2021-11-17 15:36:32,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:36:32,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-17 15:36:32,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:36:32,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-17 15:36:32,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 15:36:32,197 INFO L87 Difference]: Start difference. First operand 236 states and 292 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 15:36:32,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:36:32,208 INFO L93 Difference]: Finished difference Result 469 states and 582 transitions. [2021-11-17 15:36:32,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-17 15:36:32,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 58 [2021-11-17 15:36:32,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:36:32,211 INFO L225 Difference]: With dead ends: 469 [2021-11-17 15:36:32,211 INFO L226 Difference]: Without dead ends: 237 [2021-11-17 15:36:32,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 15:36:32,212 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 0 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-17 15:36:32,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 541 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-17 15:36:32,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-11-17 15:36:32,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2021-11-17 15:36:32,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 213 states have (on average 1.2488262910798122) internal successors, (266), 219 states have internal predecessors, (266), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-17 15:36:32,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 293 transitions. [2021-11-17 15:36:32,228 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 293 transitions. Word has length 58 [2021-11-17 15:36:32,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:36:32,229 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 293 transitions. [2021-11-17 15:36:32,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 15:36:32,229 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 293 transitions. [2021-11-17 15:36:32,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-17 15:36:32,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:36:32,232 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] [2021-11-17 15:36:32,249 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 15:36:32,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:36:32,450 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:36:32,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:36:32,450 INFO L85 PathProgramCache]: Analyzing trace with hash -413913797, now seen corresponding path program 1 times [2021-11-17 15:36:32,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:36:32,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484343088] [2021-11-17 15:36:32,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:36:32,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:36:32,464 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:36:32,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050533872] [2021-11-17 15:36:32,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:36:32,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:36:32,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:36:32,466 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-17 15:36:32,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-17 15:36:32,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:36:32,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-17 15:36:32,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:36:32,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:36:32,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:36:32,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:36:32,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484343088] [2021-11-17 15:36:32,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:36:32,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050533872] [2021-11-17 15:36:32,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050533872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:36:32,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:36:32,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-17 15:36:32,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065249599] [2021-11-17 15:36:32,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:36:32,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-17 15:36:32,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:36:32,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-17 15:36:32,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 15:36:32,795 INFO L87 Difference]: Start difference. First operand 237 states and 293 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 15:36:32,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:36:32,884 INFO L93 Difference]: Finished difference Result 592 states and 736 transitions. [2021-11-17 15:36:32,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-17 15:36:32,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 58 [2021-11-17 15:36:32,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:36:32,886 INFO L225 Difference]: With dead ends: 592 [2021-11-17 15:36:32,886 INFO L226 Difference]: Without dead ends: 359 [2021-11-17 15:36:32,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 15:36:32,888 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 106 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-17 15:36:32,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 568 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 15:36:32,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-11-17 15:36:32,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 345. [2021-11-17 15:36:32,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 321 states have (on average 1.249221183800623) internal successors, (401), 327 states have internal predecessors, (401), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-17 15:36:32,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 428 transitions. [2021-11-17 15:36:32,900 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 428 transitions. Word has length 58 [2021-11-17 15:36:32,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:36:32,900 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 428 transitions. [2021-11-17 15:36:32,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 15:36:32,900 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 428 transitions. [2021-11-17 15:36:32,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-17 15:36:32,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:36:32,901 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:36:32,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-17 15:36:33,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:36:33,120 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:36:33,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:36:33,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1298801861, now seen corresponding path program 1 times [2021-11-17 15:36:33,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:36:33,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88271854] [2021-11-17 15:36:33,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:36:33,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:36:33,133 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:36:33,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427401985] [2021-11-17 15:36:33,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:36:33,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:36:33,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:36:33,134 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-17 15:36:33,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-17 15:36:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:36:33,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-17 15:36:33,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:36:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:36:33,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-17 15:36:33,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:36:33,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:36:33,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88271854] [2021-11-17 15:36:33,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:36:33,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427401985] [2021-11-17 15:36:33,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427401985] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-17 15:36:33,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-17 15:36:33,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 9 [2021-11-17 15:36:33,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090483684] [2021-11-17 15:36:33,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:36:33,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-17 15:36:33,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:36:33,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-17 15:36:33,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-17 15:36:33,539 INFO L87 Difference]: Start difference. First operand 345 states and 428 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-17 15:36:33,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:36:33,666 INFO L93 Difference]: Finished difference Result 1228 states and 1566 transitions. [2021-11-17 15:36:33,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-17 15:36:33,667 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2021-11-17 15:36:33,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:36:33,671 INFO L225 Difference]: With dead ends: 1228 [2021-11-17 15:36:33,671 INFO L226 Difference]: Without dead ends: 932 [2021-11-17 15:36:33,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-17 15:36:33,672 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 1692 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1692 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-17 15:36:33,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1692 Valid, 855 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 15:36:33,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-11-17 15:36:33,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 573. [2021-11-17 15:36:33,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 544 states have (on average 1.2610294117647058) internal successors, (686), 550 states have internal predecessors, (686), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (16), 13 states have call predecessors, (16), 15 states have call successors, (16) [2021-11-17 15:36:33,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 718 transitions. [2021-11-17 15:36:33,688 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 718 transitions. Word has length 62 [2021-11-17 15:36:33,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:36:33,689 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 718 transitions. [2021-11-17 15:36:33,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-17 15:36:33,689 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 718 transitions. [2021-11-17 15:36:33,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-17 15:36:33,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:36:33,690 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:36:33,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-17 15:36:33,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:36:33,907 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:36:33,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:36:33,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1545086991, now seen corresponding path program 1 times [2021-11-17 15:36:33,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:36:33,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014999934] [2021-11-17 15:36:33,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:36:33,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:36:33,921 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:36:33,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3631576] [2021-11-17 15:36:33,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:36:33,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:36:33,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:36:33,925 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-17 15:36:33,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-17 15:36:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:36:34,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-17 15:36:34,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:36:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-17 15:36:34,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:36:34,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:36:34,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014999934] [2021-11-17 15:36:34,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:36:34,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3631576] [2021-11-17 15:36:34,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3631576] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:36:34,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:36:34,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-17 15:36:34,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779322440] [2021-11-17 15:36:34,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:36:34,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-17 15:36:34,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:36:34,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-17 15:36:34,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-17 15:36:34,263 INFO L87 Difference]: Start difference. First operand 573 states and 718 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-17 15:36:34,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:36:34,340 INFO L93 Difference]: Finished difference Result 1078 states and 1360 transitions. [2021-11-17 15:36:34,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-17 15:36:34,341 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 93 [2021-11-17 15:36:34,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:36:34,344 INFO L225 Difference]: With dead ends: 1078 [2021-11-17 15:36:34,344 INFO L226 Difference]: Without dead ends: 573 [2021-11-17 15:36:34,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-17 15:36:34,346 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 25 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-17 15:36:34,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 991 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 15:36:34,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-11-17 15:36:34,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 573. [2021-11-17 15:36:34,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 544 states have (on average 1.2610294117647058) internal successors, (686), 550 states have internal predecessors, (686), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-17 15:36:34,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 717 transitions. [2021-11-17 15:36:34,361 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 717 transitions. Word has length 93 [2021-11-17 15:36:34,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:36:34,361 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 717 transitions. [2021-11-17 15:36:34,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-17 15:36:34,362 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 717 transitions. [2021-11-17 15:36:34,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-17 15:36:34,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:36:34,366 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:36:34,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-17 15:36:34,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:36:34,572 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:36:34,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:36:34,572 INFO L85 PathProgramCache]: Analyzing trace with hash -441690957, now seen corresponding path program 1 times [2021-11-17 15:36:34,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:36:34,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280921444] [2021-11-17 15:36:34,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:36:34,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:36:34,588 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:36:34,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533095256] [2021-11-17 15:36:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:36:34,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:36:34,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:36:34,590 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-17 15:36:34,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-17 15:36:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:36:34,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-17 15:36:34,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:36:34,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-17 15:36:34,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-17 15:36:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-17 15:36:34,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:36:34,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:36:34,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280921444] [2021-11-17 15:36:34,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:36:34,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533095256] [2021-11-17 15:36:34,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533095256] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:36:34,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:36:34,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-17 15:36:34,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340077658] [2021-11-17 15:36:34,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:36:34,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-17 15:36:34,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:36:34,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-17 15:36:34,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-17 15:36:34,887 INFO L87 Difference]: Start difference. First operand 573 states and 717 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-17 15:36:35,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:36:35,065 INFO L93 Difference]: Finished difference Result 757 states and 966 transitions. [2021-11-17 15:36:35,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-17 15:36:35,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 98 [2021-11-17 15:36:35,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:36:35,068 INFO L225 Difference]: With dead ends: 757 [2021-11-17 15:36:35,068 INFO L226 Difference]: Without dead ends: 744 [2021-11-17 15:36:35,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-17 15:36:35,069 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 140 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-17 15:36:35,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 704 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-17 15:36:35,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-11-17 15:36:35,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 577. [2021-11-17 15:36:35,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 548 states have (on average 1.2591240875912408) internal successors, (690), 554 states have internal predecessors, (690), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-17 15:36:35,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 721 transitions. [2021-11-17 15:36:35,083 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 721 transitions. Word has length 98 [2021-11-17 15:36:35,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:36:35,083 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 721 transitions. [2021-11-17 15:36:35,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-17 15:36:35,084 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 721 transitions. [2021-11-17 15:36:35,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-17 15:36:35,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:36:35,085 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:36:35,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-17 15:36:35,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-17 15:36:35,303 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:36:35,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:36:35,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1451857612, now seen corresponding path program 1 times [2021-11-17 15:36:35,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:36:35,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935370273] [2021-11-17 15:36:35,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:36:35,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:36:35,315 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:36:35,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [468279437] [2021-11-17 15:36:35,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:36:35,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:36:35,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:36:35,339 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-17 15:36:35,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-17 15:36:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:36:35,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-17 15:36:35,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:36:35,789 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-17 15:36:35,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:36:35,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:36:35,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935370273] [2021-11-17 15:36:35,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:36:35,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468279437] [2021-11-17 15:36:35,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468279437] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:36:35,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:36:35,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-17 15:36:35,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839348112] [2021-11-17 15:36:35,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:36:35,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-17 15:36:35,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:36:35,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-17 15:36:35,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-17 15:36:35,791 INFO L87 Difference]: Start difference. First operand 577 states and 721 transitions. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-17 15:36:35,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:36:35,884 INFO L93 Difference]: Finished difference Result 1094 states and 1379 transitions. [2021-11-17 15:36:35,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-17 15:36:35,885 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 110 [2021-11-17 15:36:35,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:36:35,887 INFO L225 Difference]: With dead ends: 1094 [2021-11-17 15:36:35,887 INFO L226 Difference]: Without dead ends: 582 [2021-11-17 15:36:35,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-17 15:36:35,888 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 18 mSDsluCounter, 1532 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1792 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-17 15:36:35,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 1792 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 15:36:35,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-11-17 15:36:35,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 582. [2021-11-17 15:36:35,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 552 states have (on average 1.2590579710144927) internal successors, (695), 559 states have internal predecessors, (695), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (16), 13 states have call predecessors, (16), 15 states have call successors, (16) [2021-11-17 15:36:35,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 727 transitions. [2021-11-17 15:36:35,902 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 727 transitions. Word has length 110 [2021-11-17 15:36:35,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:36:35,903 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 727 transitions. [2021-11-17 15:36:35,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-17 15:36:35,903 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 727 transitions. [2021-11-17 15:36:35,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-17 15:36:35,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:36:35,904 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:36:35,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-17 15:36:36,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:36:36,120 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:36:36,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:36:36,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1710945854, now seen corresponding path program 1 times [2021-11-17 15:36:36,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:36:36,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464436262] [2021-11-17 15:36:36,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:36:36,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:36:36,132 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:36:36,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201235486] [2021-11-17 15:36:36,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:36:36,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:36:36,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:36:36,133 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-17 15:36:36,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-17 15:36:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:36:36,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-17 15:36:36,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:36:36,584 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-17 15:36:36,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-17 15:36:36,859 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-17 15:36:36,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:36:36,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464436262] [2021-11-17 15:36:36,859 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:36:36,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201235486] [2021-11-17 15:36:36,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201235486] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-17 15:36:36,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-17 15:36:36,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2021-11-17 15:36:36,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52437055] [2021-11-17 15:36:36,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-17 15:36:36,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-17 15:36:36,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:36:36,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-17 15:36:36,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-17 15:36:36,861 INFO L87 Difference]: Start difference. First operand 582 states and 727 transitions. Second operand has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-17 15:36:37,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:36:37,116 INFO L93 Difference]: Finished difference Result 1117 states and 1411 transitions. [2021-11-17 15:36:37,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-17 15:36:37,117 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 112 [2021-11-17 15:36:37,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:36:37,119 INFO L225 Difference]: With dead ends: 1117 [2021-11-17 15:36:37,119 INFO L226 Difference]: Without dead ends: 598 [2021-11-17 15:36:37,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-11-17 15:36:37,121 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 31 mSDsluCounter, 2048 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 2309 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-17 15:36:37,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 2309 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-17 15:36:37,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-17 15:36:37,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 595. [2021-11-17 15:36:37,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 564 states have (on average 1.2641843971631206) internal successors, (713), 571 states have internal predecessors, (713), 16 states have call successors, (16), 10 states have call predecessors, (16), 11 states have return successors, (16), 13 states have call predecessors, (16), 15 states have call successors, (16) [2021-11-17 15:36:37,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 745 transitions. [2021-11-17 15:36:37,161 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 745 transitions. Word has length 112 [2021-11-17 15:36:37,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:36:37,161 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 745 transitions. [2021-11-17 15:36:37,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-17 15:36:37,161 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 745 transitions. [2021-11-17 15:36:37,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-17 15:36:37,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:36:37,162 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:36:37,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-17 15:36:37,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-17 15:36:37,382 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:36:37,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:36:37,383 INFO L85 PathProgramCache]: Analyzing trace with hash 2135958996, now seen corresponding path program 2 times [2021-11-17 15:36:37,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:36:37,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612673606] [2021-11-17 15:36:37,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:36:37,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:36:37,395 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:36:37,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986712171] [2021-11-17 15:36:37,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-17 15:36:37,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:36:37,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:36:37,397 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-17 15:36:37,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-17 15:36:39,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-17 15:36:39,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-17 15:36:39,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-17 15:36:39,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:36:39,475 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-17 15:36:39,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-17 15:36:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-17 15:36:39,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:36:39,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612673606] [2021-11-17 15:36:39,782 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:36:39,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986712171] [2021-11-17 15:36:39,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986712171] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-17 15:36:39,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-17 15:36:39,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2021-11-17 15:36:39,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653885233] [2021-11-17 15:36:39,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-17 15:36:39,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-17 15:36:39,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:36:39,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-17 15:36:39,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-11-17 15:36:39,783 INFO L87 Difference]: Start difference. First operand 595 states and 745 transitions. Second operand has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-17 15:36:40,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:36:40,566 INFO L93 Difference]: Finished difference Result 1210 states and 1528 transitions. [2021-11-17 15:36:40,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-17 15:36:40,566 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 116 [2021-11-17 15:36:40,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:36:40,568 INFO L225 Difference]: With dead ends: 1210 [2021-11-17 15:36:40,568 INFO L226 Difference]: Without dead ends: 613 [2021-11-17 15:36:40,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2021-11-17 15:36:40,570 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 285 mSDsluCounter, 2831 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 3090 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-17 15:36:40,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 3090 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-17 15:36:40,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-11-17 15:36:40,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 601. [2021-11-17 15:36:40,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 570 states have (on average 1.2614035087719297) internal successors, (719), 577 states have internal predecessors, (719), 16 states have call successors, (16), 10 states have call predecessors, (16), 11 states have return successors, (16), 13 states have call predecessors, (16), 15 states have call successors, (16) [2021-11-17 15:36:40,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 751 transitions. [2021-11-17 15:36:40,587 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 751 transitions. Word has length 116 [2021-11-17 15:36:40,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:36:40,587 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 751 transitions. [2021-11-17 15:36:40,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-17 15:36:40,588 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 751 transitions. [2021-11-17 15:36:40,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-17 15:36:40,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:36:40,589 INFO L514 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:36:40,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-17 15:36:40,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-17 15:36:40,806 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-17 15:36:40,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:36:40,806 INFO L85 PathProgramCache]: Analyzing trace with hash -224218713, now seen corresponding path program 3 times [2021-11-17 15:36:40,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:36:40,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416728487] [2021-11-17 15:36:40,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:36:40,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:36:40,830 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:36:40,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663448988] [2021-11-17 15:36:40,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-17 15:36:40,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:36:40,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:36:40,834 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-17 15:36:40,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process Killed by 15