./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-regression/rule60_list2.c_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 5dc0e184171498e703ccf08545f4f79d3c1c383c8c0fc13a1f35990befb669a4 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 10:27:16,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 10:27:16,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 10:27:16,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 10:27:16,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 10:27:16,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 10:27:16,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 10:27:16,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 10:27:16,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 10:27:16,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 10:27:16,562 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 10:27:16,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 10:27:16,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 10:27:16,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 10:27:16,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 10:27:16,566 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 10:27:16,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 10:27:16,567 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 10:27:16,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 10:27:16,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 10:27:16,570 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 10:27:16,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 10:27:16,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 10:27:16,576 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 10:27:16,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 10:27:16,584 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 10:27:16,584 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 10:27:16,585 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 10:27:16,586 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 10:27:16,587 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 10:27:16,587 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 10:27:16,588 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 10:27:16,588 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 10:27:16,589 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 10:27:16,590 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 10:27:16,591 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 10:27:16,592 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 10:27:16,592 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 10:27:16,592 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 10:27:16,594 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 10:27:16,594 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 10:27:16,595 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 10:27:16,615 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 10:27:16,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 10:27:16,616 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 10:27:16,616 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 10:27:16,616 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 10:27:16,616 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 10:27:16,617 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 10:27:16,617 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 10:27:16,617 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 10:27:16,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 10:27:16,618 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 10:27:16,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 10:27:16,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 10:27:16,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 10:27:16,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 10:27:16,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 10:27:16,619 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 10:27:16,619 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 10:27:16,619 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 10:27:16,619 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 10:27:16,620 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 10:27:16,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 10:27:16,620 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 10:27:16,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 10:27:16,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:27:16,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 10:27:16,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 10:27:16,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 10:27:16,621 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 10:27:16,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 10:27:16,621 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 10:27:16,621 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 10:27:16,622 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 10:27:16,622 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 10:27:16,622 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5dc0e184171498e703ccf08545f4f79d3c1c383c8c0fc13a1f35990befb669a4 [2021-12-22 10:27:16,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 10:27:16,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 10:27:16,843 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 10:27:16,844 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 10:27:16,844 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 10:27:16,845 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i [2021-12-22 10:27:16,899 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5da0ac501/67940347810b49c8bf6db857fc1195b7/FLAGe51a0b018 [2021-12-22 10:27:17,310 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 10:27:17,311 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i [2021-12-22 10:27:17,323 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5da0ac501/67940347810b49c8bf6db857fc1195b7/FLAGe51a0b018 [2021-12-22 10:27:17,334 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5da0ac501/67940347810b49c8bf6db857fc1195b7 [2021-12-22 10:27:17,336 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 10:27:17,337 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 10:27:17,338 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 10:27:17,338 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 10:27:17,341 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 10:27:17,341 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:27:17" (1/1) ... [2021-12-22 10:27:17,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d19efc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:27:17, skipping insertion in model container [2021-12-22 10:27:17,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:27:17" (1/1) ... [2021-12-22 10:27:17,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 10:27:17,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 10:27:17,495 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/ldv-regression/rule60_list2.c_1.i[296,309] [2021-12-22 10:27:17,624 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:27:17,631 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 10:27:17,641 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/ldv-regression/rule60_list2.c_1.i[296,309] [2021-12-22 10:27:17,660 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:27:17,679 INFO L208 MainTranslator]: Completed translation [2021-12-22 10:27:17,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:27:17 WrapperNode [2021-12-22 10:27:17,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 10:27:17,682 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 10:27:17,683 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 10:27:17,683 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 10:27:17,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:27:17" (1/1) ... [2021-12-22 10:27:17,708 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:27:17" (1/1) ... [2021-12-22 10:27:17,726 INFO L137 Inliner]: procedures = 126, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2021-12-22 10:27:17,726 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 10:27:17,727 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 10:27:17,727 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 10:27:17,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 10:27:17,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:27:17" (1/1) ... [2021-12-22 10:27:17,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:27:17" (1/1) ... [2021-12-22 10:27:17,744 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:27:17" (1/1) ... [2021-12-22 10:27:17,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:27:17" (1/1) ... [2021-12-22 10:27:17,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:27:17" (1/1) ... [2021-12-22 10:27:17,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:27:17" (1/1) ... [2021-12-22 10:27:17,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:27:17" (1/1) ... [2021-12-22 10:27:17,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 10:27:17,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 10:27:17,762 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 10:27:17,762 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 10:27:17,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:27:17" (1/1) ... [2021-12-22 10:27:17,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:27:17,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:27:17,811 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 10:27:17,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 10:27:17,842 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2021-12-22 10:27:17,843 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2021-12-22 10:27:17,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 10:27:17,843 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-12-22 10:27:17,843 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-12-22 10:27:17,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 10:27:17,844 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2021-12-22 10:27:17,845 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2021-12-22 10:27:17,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 10:27:17,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 10:27:17,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 10:27:17,910 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 10:27:17,912 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 10:27:18,016 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 10:27:18,027 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 10:27:18,028 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 10:27:18,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:27:18 BoogieIcfgContainer [2021-12-22 10:27:18,029 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 10:27:18,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 10:27:18,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 10:27:18,035 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 10:27:18,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:27:17" (1/3) ... [2021-12-22 10:27:18,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67cde169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:27:18, skipping insertion in model container [2021-12-22 10:27:18,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:27:17" (2/3) ... [2021-12-22 10:27:18,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67cde169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:27:18, skipping insertion in model container [2021-12-22 10:27:18,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:27:18" (3/3) ... [2021-12-22 10:27:18,037 INFO L111 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2021-12-22 10:27:18,040 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 10:27:18,040 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 10:27:18,068 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 10:27:18,083 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 10:27:18,083 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 10:27:18,095 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-22 10:27:18,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 10:27:18,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:27:18,099 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:27:18,099 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:27:18,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:27:18,102 INFO L85 PathProgramCache]: Analyzing trace with hash 484842023, now seen corresponding path program 1 times [2021-12-22 10:27:18,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:27:18,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783506275] [2021-12-22 10:27:18,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:27:18,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:27:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:27:18,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:27:18,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783506275] [2021-12-22 10:27:18,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783506275] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:27:18,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:27:18,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 10:27:18,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980811303] [2021-12-22 10:27:18,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:27:18,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 10:27:18,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:27:18,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 10:27:18,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 10:27:18,249 INFO L87 Difference]: Start difference. First operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-12-22 10:27:18,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:27:18,283 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2021-12-22 10:27:18,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 10:27:18,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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 7 [2021-12-22 10:27:18,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:27:18,290 INFO L225 Difference]: With dead ends: 68 [2021-12-22 10:27:18,290 INFO L226 Difference]: Without dead ends: 30 [2021-12-22 10:27:18,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 10:27:18,295 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 13 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:27:18,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 99 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:27:18,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-22 10:27:18,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-22 10:27:18,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-22 10:27:18,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-12-22 10:27:18,328 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 7 [2021-12-22 10:27:18,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:27:18,329 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-12-22 10:27:18,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-12-22 10:27:18,329 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-12-22 10:27:18,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 10:27:18,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:27:18,330 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:27:18,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 10:27:18,331 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:27:18,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:27:18,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1134155612, now seen corresponding path program 1 times [2021-12-22 10:27:18,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:27:18,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203659362] [2021-12-22 10:27:18,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:27:18,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:27:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:18,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 10:27:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:18,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 10:27:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 10:27:18,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:27:18,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203659362] [2021-12-22 10:27:18,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203659362] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:27:18,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117460574] [2021-12-22 10:27:18,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:27:18,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:27:18,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:27:18,516 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:27:18,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 10:27:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:18,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-22 10:27:18,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:27:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 10:27:18,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:27:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 10:27:18,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117460574] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:27:18,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:27:18,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2021-12-22 10:27:18,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579473035] [2021-12-22 10:27:18,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:27:18,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 10:27:18,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:27:18,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 10:27:18,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 10:27:18,922 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:27:19,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:27:19,008 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2021-12-22 10:27:19,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 10:27:19,009 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-12-22 10:27:19,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:27:19,012 INFO L225 Difference]: With dead ends: 53 [2021-12-22 10:27:19,012 INFO L226 Difference]: Without dead ends: 33 [2021-12-22 10:27:19,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-22 10:27:19,019 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:27:19,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 143 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:27:19,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-22 10:27:19,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-22 10:27:19,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-22 10:27:19,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-12-22 10:27:19,047 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 26 [2021-12-22 10:27:19,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:27:19,048 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-12-22 10:27:19,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:27:19,048 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-12-22 10:27:19,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 10:27:19,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:27:19,049 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:27:19,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 10:27:19,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:27:19,256 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:27:19,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:27:19,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1951804062, now seen corresponding path program 1 times [2021-12-22 10:27:19,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:27:19,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552547514] [2021-12-22 10:27:19,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:27:19,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:27:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:19,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 10:27:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:19,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 10:27:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 10:27:19,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:27:19,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552547514] [2021-12-22 10:27:19,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552547514] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:27:19,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:27:19,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 10:27:19,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902306328] [2021-12-22 10:27:19,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:27:19,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 10:27:19,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:27:19,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 10:27:19,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 10:27:19,395 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 10:27:19,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:27:19,461 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2021-12-22 10:27:19,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 10:27:19,461 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-12-22 10:27:19,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:27:19,462 INFO L225 Difference]: With dead ends: 51 [2021-12-22 10:27:19,462 INFO L226 Difference]: Without dead ends: 30 [2021-12-22 10:27:19,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-22 10:27:19,463 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 12 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:27:19,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 137 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:27:19,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-22 10:27:19,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-22 10:27:19,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-22 10:27:19,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-12-22 10:27:19,468 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 26 [2021-12-22 10:27:19,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:27:19,468 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-12-22 10:27:19,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 10:27:19,468 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-12-22 10:27:19,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 10:27:19,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:27:19,469 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:27:19,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 10:27:19,470 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:27:19,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:27:19,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1250739484, now seen corresponding path program 1 times [2021-12-22 10:27:19,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:27:19,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057649505] [2021-12-22 10:27:19,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:27:19,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:27:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:19,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 10:27:19,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:19,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 10:27:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 10:27:19,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:27:19,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057649505] [2021-12-22 10:27:19,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057649505] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:27:19,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914420086] [2021-12-22 10:27:19,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:27:19,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:27:19,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:27:19,669 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:27:19,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 10:27:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:19,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-22 10:27:19,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:27:19,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 10:27:19,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 10:27:19,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914420086] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:27:19,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 10:27:19,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 22 [2021-12-22 10:27:19,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017171237] [2021-12-22 10:27:19,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:27:19,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 10:27:19,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:27:19,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 10:27:19,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-12-22 10:27:19,968 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:27:20,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:27:20,239 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2021-12-22 10:27:20,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 10:27:20,240 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-12-22 10:27:20,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:27:20,242 INFO L225 Difference]: With dead ends: 57 [2021-12-22 10:27:20,242 INFO L226 Difference]: Without dead ends: 54 [2021-12-22 10:27:20,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-12-22 10:27:20,246 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 74 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:27:20,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 135 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:27:20,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-22 10:27:20,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2021-12-22 10:27:20,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-22 10:27:20,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2021-12-22 10:27:20,259 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 26 [2021-12-22 10:27:20,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:27:20,259 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2021-12-22 10:27:20,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:27:20,260 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2021-12-22 10:27:20,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-22 10:27:20,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:27:20,260 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 10:27:20,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 10:27:20,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-22 10:27:20,476 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:27:20,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:27:20,476 INFO L85 PathProgramCache]: Analyzing trace with hash 937918941, now seen corresponding path program 1 times [2021-12-22 10:27:20,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:27:20,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362630115] [2021-12-22 10:27:20,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:27:20,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:27:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:20,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 10:27:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:20,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 10:27:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:20,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 10:27:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:20,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 10:27:20,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:27:20,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362630115] [2021-12-22 10:27:20,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362630115] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:27:20,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234122495] [2021-12-22 10:27:20,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:27:20,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:27:20,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:27:20,670 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:27:20,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 10:27:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:20,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-22 10:27:20,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:27:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:27:20,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:27:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:27:21,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234122495] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:27:21,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:27:21,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 25 [2021-12-22 10:27:21,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667593729] [2021-12-22 10:27:21,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:27:21,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-22 10:27:21,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:27:21,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-22 10:27:21,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-12-22 10:27:21,085 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 25 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 19 states have internal predecessors, (39), 5 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-22 10:27:21,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:27:21,540 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2021-12-22 10:27:21,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 10:27:21,540 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 19 states have internal predecessors, (39), 5 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2021-12-22 10:27:21,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:27:21,541 INFO L225 Difference]: With dead ends: 64 [2021-12-22 10:27:21,541 INFO L226 Difference]: Without dead ends: 60 [2021-12-22 10:27:21,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 10:27:21,542 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 84 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 10:27:21,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 111 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 10:27:21,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-22 10:27:21,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-22 10:27:21,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 44 states have internal predecessors, (51), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-22 10:27:21,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2021-12-22 10:27:21,549 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 33 [2021-12-22 10:27:21,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:27:21,549 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2021-12-22 10:27:21,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 19 states have internal predecessors, (39), 5 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-22 10:27:21,549 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2021-12-22 10:27:21,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-22 10:27:21,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:27:21,550 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 10:27:21,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 10:27:21,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:27:21,751 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:27:21,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:27:21,751 INFO L85 PathProgramCache]: Analyzing trace with hash 128572315, now seen corresponding path program 1 times [2021-12-22 10:27:21,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:27:21,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65606682] [2021-12-22 10:27:21,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:27:21,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:27:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:21,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 10:27:21,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:21,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 10:27:21,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:21,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 10:27:21,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:21,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 10:27:21,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:27:21,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65606682] [2021-12-22 10:27:21,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65606682] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:27:21,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956664846] [2021-12-22 10:27:21,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:27:21,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:27:21,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:27:21,892 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:27:21,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 10:27:21,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:21,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 10:27:21,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:27:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:27:22,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:27:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:27:22,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956664846] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:27:22,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:27:22,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 34 [2021-12-22 10:27:22,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156489358] [2021-12-22 10:27:22,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:27:22,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-22 10:27:22,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:27:22,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-22 10:27:22,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-12-22 10:27:22,468 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 26 states have internal predecessors, (63), 7 states have call successors, (13), 11 states have call predecessors, (13), 7 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-22 10:27:22,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:27:22,934 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2021-12-22 10:27:22,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 10:27:22,935 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 26 states have internal predecessors, (63), 7 states have call successors, (13), 11 states have call predecessors, (13), 7 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 33 [2021-12-22 10:27:22,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:27:22,935 INFO L225 Difference]: With dead ends: 78 [2021-12-22 10:27:22,935 INFO L226 Difference]: Without dead ends: 68 [2021-12-22 10:27:22,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=285, Invalid=1695, Unknown=0, NotChecked=0, Total=1980 [2021-12-22 10:27:22,937 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 171 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:27:22,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 124 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 10:27:22,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-22 10:27:22,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2021-12-22 10:27:22,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-22 10:27:22,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-12-22 10:27:22,942 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 33 [2021-12-22 10:27:22,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:27:22,942 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-12-22 10:27:22,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 26 states have internal predecessors, (63), 7 states have call successors, (13), 11 states have call predecessors, (13), 7 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-22 10:27:22,942 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-12-22 10:27:22,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-22 10:27:22,943 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:27:22,947 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 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] [2021-12-22 10:27:22,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 10:27:23,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:27:23,167 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:27:23,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:27:23,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1975182920, now seen corresponding path program 1 times [2021-12-22 10:27:23,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:27:23,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282030744] [2021-12-22 10:27:23,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:27:23,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:27:23,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:23,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 10:27:23,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:23,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 10:27:23,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:23,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 10:27:23,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:23,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-22 10:27:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 10:27:23,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:27:23,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282030744] [2021-12-22 10:27:23,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282030744] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:27:23,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146279819] [2021-12-22 10:27:23,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:27:23,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:27:23,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:27:23,279 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:27:23,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 10:27:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:23,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-22 10:27:23,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:27:23,626 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 10:27:23,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:27:23,800 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 10:27:23,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146279819] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:27:23,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:27:23,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 30 [2021-12-22 10:27:23,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465377204] [2021-12-22 10:27:23,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:27:23,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-22 10:27:23,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:27:23,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-22 10:27:23,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=803, Unknown=0, NotChecked=0, Total=870 [2021-12-22 10:27:23,802 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 23 states have internal predecessors, (56), 7 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-22 10:27:24,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:27:24,501 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2021-12-22 10:27:24,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 10:27:24,501 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 23 states have internal predecessors, (56), 7 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) Word has length 43 [2021-12-22 10:27:24,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:27:24,502 INFO L225 Difference]: With dead ends: 82 [2021-12-22 10:27:24,502 INFO L226 Difference]: Without dead ends: 64 [2021-12-22 10:27:24,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=256, Invalid=2096, Unknown=0, NotChecked=0, Total=2352 [2021-12-22 10:27:24,504 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 96 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 10:27:24,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 192 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 10:27:24,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-22 10:27:24,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2021-12-22 10:27:24,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-22 10:27:24,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-12-22 10:27:24,510 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 43 [2021-12-22 10:27:24,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:27:24,510 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-12-22 10:27:24,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 23 states have internal predecessors, (56), 7 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-22 10:27:24,510 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-12-22 10:27:24,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-22 10:27:24,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:27:24,511 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-12-22 10:27:24,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 10:27:24,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:27:24,730 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:27:24,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:27:24,730 INFO L85 PathProgramCache]: Analyzing trace with hash 156287564, now seen corresponding path program 1 times [2021-12-22 10:27:24,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:27:24,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675637381] [2021-12-22 10:27:24,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:27:24,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:27:24,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:24,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 10:27:24,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:24,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 10:27:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:24,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 10:27:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:24,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-22 10:27:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 10:27:24,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:27:24,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675637381] [2021-12-22 10:27:24,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675637381] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:27:24,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116327879] [2021-12-22 10:27:24,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:27:24,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:27:24,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:27:24,806 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:27:24,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 10:27:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:27:24,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-22 10:27:24,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:27:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 10:27:24,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:27:25,112 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 10:27:25,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116327879] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:27:25,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:27:25,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 16 [2021-12-22 10:27:25,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073183190] [2021-12-22 10:27:25,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:27:25,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-22 10:27:25,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:27:25,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-22 10:27:25,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-12-22 10:27:25,114 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 12 states have internal predecessors, (43), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-22 10:27:25,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:27:25,309 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-12-22 10:27:25,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 10:27:25,309 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 12 states have internal predecessors, (43), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2021-12-22 10:27:25,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:27:25,310 INFO L225 Difference]: With dead ends: 60 [2021-12-22 10:27:25,310 INFO L226 Difference]: Without dead ends: 53 [2021-12-22 10:27:25,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-12-22 10:27:25,311 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 26 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:27:25,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 119 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:27:25,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-22 10:27:25,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-22 10:27:25,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-22 10:27:25,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2021-12-22 10:27:25,327 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 43 [2021-12-22 10:27:25,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:27:25,327 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2021-12-22 10:27:25,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 12 states have internal predecessors, (43), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-22 10:27:25,327 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2021-12-22 10:27:25,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-22 10:27:25,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:27:25,333 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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] [2021-12-22 10:27:25,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 10:27:25,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:27:25,548 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:27:25,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:27:25,548 INFO L85 PathProgramCache]: Analyzing trace with hash -2126992523, now seen corresponding path program 1 times [2021-12-22 10:27:25,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:27:25,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926276149] [2021-12-22 10:27:25,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:27:25,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:27:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 10:27:25,558 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 10:27:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 10:27:25,598 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 10:27:25,598 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-22 10:27:25,599 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-22 10:27:25,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 10:27:25,603 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:27:25,605 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-22 10:27:25,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 10:27:25 BoogieIcfgContainer [2021-12-22 10:27:25,664 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-22 10:27:25,665 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 10:27:25,665 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 10:27:25,665 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 10:27:25,665 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:27:18" (3/4) ... [2021-12-22 10:27:25,667 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-22 10:27:25,712 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-22 10:27:25,714 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 10:27:25,715 INFO L158 Benchmark]: Toolchain (without parser) took 8377.77ms. Allocated memory was 98.6MB in the beginning and 144.7MB in the end (delta: 46.1MB). Free memory was 63.1MB in the beginning and 96.9MB in the end (delta: -33.7MB). Peak memory consumption was 11.9MB. Max. memory is 16.1GB. [2021-12-22 10:27:25,715 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 98.6MB. Free memory was 71.9MB in the beginning and 71.9MB in the end (delta: 21.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 10:27:25,715 INFO L158 Benchmark]: CACSL2BoogieTranslator took 343.67ms. Allocated memory is still 98.6MB. Free memory was 63.1MB in the beginning and 68.9MB in the end (delta: -5.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-22 10:27:25,716 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.06ms. Allocated memory is still 98.6MB. Free memory was 68.9MB in the beginning and 67.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 10:27:25,716 INFO L158 Benchmark]: Boogie Preprocessor took 33.10ms. Allocated memory is still 98.6MB. Free memory was 66.8MB in the beginning and 65.8MB in the end (delta: 970.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 10:27:25,716 INFO L158 Benchmark]: RCFGBuilder took 268.83ms. Allocated memory is still 98.6MB. Free memory was 65.8MB in the beginning and 54.3MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-22 10:27:25,717 INFO L158 Benchmark]: TraceAbstraction took 7634.35ms. Allocated memory was 98.6MB in the beginning and 144.7MB in the end (delta: 46.1MB). Free memory was 53.8MB in the beginning and 101.1MB in the end (delta: -47.3MB). Peak memory consumption was 2.0MB. Max. memory is 16.1GB. [2021-12-22 10:27:25,717 INFO L158 Benchmark]: Witness Printer took 49.18ms. Allocated memory is still 144.7MB. Free memory was 101.1MB in the beginning and 96.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-22 10:27:25,719 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 98.6MB. Free memory was 71.9MB in the beginning and 71.9MB in the end (delta: 21.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 343.67ms. Allocated memory is still 98.6MB. Free memory was 63.1MB in the beginning and 68.9MB in the end (delta: -5.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.06ms. Allocated memory is still 98.6MB. Free memory was 68.9MB in the beginning and 67.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.10ms. Allocated memory is still 98.6MB. Free memory was 66.8MB in the beginning and 65.8MB in the end (delta: 970.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 268.83ms. Allocated memory is still 98.6MB. Free memory was 65.8MB in the beginning and 54.3MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 7634.35ms. Allocated memory was 98.6MB in the beginning and 144.7MB in the end (delta: 46.1MB). Free memory was 53.8MB in the beginning and 101.1MB in the end (delta: -47.3MB). Peak memory consumption was 2.0MB. Max. memory is 16.1GB. * Witness Printer took 49.18ms. Allocated memory is still 144.7MB. Free memory was 101.1MB in the beginning and 96.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 6]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L519] void * guard_malloc_counter = 0; [L534] struct list_head *elem = ((void *)0); [L544] static struct list_head head; VAL [elem={0:0}, guard_malloc_counter={0:0}, head={4:0}] [L546] struct list_head *dev1, *dev2; VAL [elem={0:0}, guard_malloc_counter={0:0}, head={4:0}] [L547] CALL, EXPR my_malloc(sizeof(*dev1)) VAL [\old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:0}, guard_malloc_counter={0:0}, head={4:0}] [L529] CALL, EXPR __getMemory(size) [L522] (size > 0) ? (0) : __blast_assert () VAL [\old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:0}, head={4:0}, size=8] [L523] guard_malloc_counter++ [L524] COND FALSE !(!__VERIFIER_nondet_int()) [L526] return (void *) guard_malloc_counter; VAL [\old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, \result={0:1}, elem={0:0}, guard_malloc_counter={0:1}, head={4:0}, size=8] [L529] RET, EXPR __getMemory(size) [L529] return __getMemory(size); [L547] RET, EXPR my_malloc(sizeof(*dev1)) VAL [elem={0:0}, guard_malloc_counter={0:1}, head={4:0}, my_malloc(sizeof(*dev1))={0:1}] [L547] dev1 = my_malloc(sizeof(*dev1)) [L548] CALL, EXPR my_malloc(sizeof(*dev2)) VAL [\old(guard_malloc_counter)=1, \old(guard_malloc_counter)=0, elem={0:0}, guard_malloc_counter={0:1}, head={4:0}] [L529] CALL, EXPR __getMemory(size) [L522] (size > 0) ? (0) : __blast_assert () VAL [\old(guard_malloc_counter)=0, \old(guard_malloc_counter)=1, \old(size)=8, elem={0:0}, guard_malloc_counter={0:1}, head={4:0}, size=8] [L523] guard_malloc_counter++ [L524] COND FALSE !(!__VERIFIER_nondet_int()) [L526] return (void *) guard_malloc_counter; VAL [\old(guard_malloc_counter)=0, \old(guard_malloc_counter)=1, \old(size)=8, \result={0:2}, elem={0:0}, guard_malloc_counter={0:2}, head={4:0}, size=8] [L529] RET, EXPR __getMemory(size) [L529] return __getMemory(size); [L548] RET, EXPR my_malloc(sizeof(*dev2)) VAL [dev1={0:1}, elem={0:0}, guard_malloc_counter={0:2}, head={4:0}, my_malloc(sizeof(*dev2))={0:2}] [L548] dev2 = my_malloc(sizeof(*dev2)) [L549] COND TRUE dev1!=((void *)0) && dev2!=((void *)0) VAL [dev1={0:1}, dev2={0:2}, elem={0:0}, guard_malloc_counter={0:2}, head={4:0}] [L550] CALL list_add(dev2, &head) VAL [\old(elem)=0, \old(elem)=0, elem={0:0}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, new={0:2}] [L536] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)=0, \old(elem)=0, elem={0:0}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, head={4:0}, new={0:2}, new={0:2}] [L537] COND TRUE __VERIFIER_nondet_int() [L538] elem = new VAL [\old(elem)=0, \old(elem)=0, elem={0:2}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, head={4:0}, new={0:2}, new={0:2}] [L550] RET list_add(dev2, &head) VAL [dev1={0:1}, dev2={0:2}, elem={0:2}, guard_malloc_counter={0:2}, head={4:0}] [L551] CALL list_add(dev1, &head) VAL [\old(elem)=0, \old(elem)=2, elem={0:2}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, new={0:1}] [L536] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)=0, \old(elem)=2, elem={0:2}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, head={4:0}, new={0:1}, new={0:1}] [L537] COND TRUE __VERIFIER_nondet_int() [L538] elem = new VAL [\old(elem)=2, \old(elem)=0, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, head={4:0}, new={0:1}, new={0:1}] [L551] RET list_add(dev1, &head) VAL [dev1={0:1}, dev2={0:2}, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}] [L552] CALL list_del(dev2) [L541] COND FALSE !(entry==elem) VAL [elem={0:1}, entry={0:2}, entry={0:2}, guard_malloc_counter={0:2}, head={4:0}] [L552] RET list_del(dev2) [L553] CALL list_add(dev2, &head) VAL [\old(elem)=1, \old(elem)=0, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, new={0:2}] [L536] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)=0, \old(elem)=1, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, head={4:0}, new={0:2}, new={0:2}] [L537] COND FALSE !(__VERIFIER_nondet_int()) [L553] RET list_add(dev2, &head) VAL [dev1={0:1}, dev2={0:2}, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}] [L554] CALL list_add(dev1, &head) VAL [\old(elem)=1, \old(elem)=0, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, new={0:1}] [L536] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)=1, \old(elem)=0, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, head={4:0}, new={0:1}, new={0:1}] [L536] CALL __blast_assert () VAL [\old(elem)=1, \old(elem)=0, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}] [L6] reach_error() VAL [\old(elem)=1, \old(elem)=0, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.5s, OverallIterations: 9, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 488 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 488 mSDsluCounter, 1060 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 810 mSDsCounter, 313 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2861 IncrementalHoareTripleChecker+Invalid, 3174 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 313 mSolverCounterUnsat, 250 mSDtfsCounter, 2861 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 552 GetRequests, 358 SyntacticMatches, 5 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=5, InterpolantAutomatonStates: 94, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 30 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 491 NumberOfCodeBlocks, 491 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 600 ConstructedInterpolants, 0 QuantifiedInterpolants, 2176 SizeOfPredicates, 34 NumberOfNonLiveVariables, 1223 ConjunctsInSsa, 115 ConjunctsInUnsatCore, 19 InterpolantComputations, 3 PerfectInterpolantSequences, 117/198 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-12-22 10:27:25,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE