./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/eqn1f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/eqn1f.c -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 18b341884f23a5462ed7b5a2994c7faf53737afb439f1d86e003040fe93a66eb --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 01:28:28,471 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 01:28:28,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 01:28:28,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 01:28:28,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 01:28:28,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 01:28:28,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 01:28:28,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 01:28:28,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 01:28:28,532 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 01:28:28,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 01:28:28,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 01:28:28,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 01:28:28,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 01:28:28,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 01:28:28,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 01:28:28,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 01:28:28,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 01:28:28,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 01:28:28,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 01:28:28,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 01:28:28,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 01:28:28,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 01:28:28,552 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 01:28:28,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 01:28:28,554 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 01:28:28,554 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 01:28:28,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 01:28:28,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 01:28:28,555 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 01:28:28,556 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 01:28:28,556 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 01:28:28,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 01:28:28,557 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 01:28:28,558 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 01:28:28,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 01:28:28,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 01:28:28,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 01:28:28,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 01:28:28,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 01:28:28,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 01:28:28,561 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 01:28:28,582 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 01:28:28,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 01:28:28,583 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 01:28:28,583 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 01:28:28,584 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 01:28:28,584 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 01:28:28,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 01:28:28,585 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 01:28:28,585 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 01:28:28,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 01:28:28,586 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 01:28:28,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 01:28:28,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 01:28:28,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 01:28:28,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 01:28:28,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 01:28:28,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 01:28:28,587 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 01:28:28,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 01:28:28,587 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 01:28:28,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 01:28:28,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 01:28:28,588 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 01:28:28,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 01:28:28,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 01:28:28,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 01:28:28,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 01:28:28,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 01:28:28,589 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 01:28:28,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 01:28:28,590 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 01:28:28,590 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 01:28:28,590 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 01:28:28,590 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 01:28:28,590 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 18b341884f23a5462ed7b5a2994c7faf53737afb439f1d86e003040fe93a66eb [2021-12-17 01:28:28,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 01:28:28,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 01:28:28,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 01:28:28,824 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 01:28:28,824 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 01:28:28,825 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn1f.c [2021-12-17 01:28:28,865 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb56cf028/7d673fd69f594a199f96df591c6d73b2/FLAG791efbdb3 [2021-12-17 01:28:29,214 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 01:28:29,215 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn1f.c [2021-12-17 01:28:29,221 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb56cf028/7d673fd69f594a199f96df591c6d73b2/FLAG791efbdb3 [2021-12-17 01:28:29,231 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb56cf028/7d673fd69f594a199f96df591c6d73b2 [2021-12-17 01:28:29,233 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 01:28:29,234 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 01:28:29,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 01:28:29,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 01:28:29,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 01:28:29,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 01:28:29" (1/1) ... [2021-12-17 01:28:29,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1126b9fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:28:29, skipping insertion in model container [2021-12-17 01:28:29,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 01:28:29" (1/1) ... [2021-12-17 01:28:29,244 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 01:28:29,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 01:28:29,403 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/array-fpi/eqn1f.c[588,601] [2021-12-17 01:28:29,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 01:28:29,431 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 01:28:29,441 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn1f.c[588,601] [2021-12-17 01:28:29,459 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 01:28:29,471 INFO L208 MainTranslator]: Completed translation [2021-12-17 01:28:29,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:28:29 WrapperNode [2021-12-17 01:28:29,472 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 01:28:29,473 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 01:28:29,473 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 01:28:29,473 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 01:28:29,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:28:29" (1/1) ... [2021-12-17 01:28:29,494 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:28:29" (1/1) ... [2021-12-17 01:28:29,510 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2021-12-17 01:28:29,510 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 01:28:29,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 01:28:29,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 01:28:29,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 01:28:29,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:28:29" (1/1) ... [2021-12-17 01:28:29,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:28:29" (1/1) ... [2021-12-17 01:28:29,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:28:29" (1/1) ... [2021-12-17 01:28:29,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:28:29" (1/1) ... [2021-12-17 01:28:29,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:28:29" (1/1) ... [2021-12-17 01:28:29,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:28:29" (1/1) ... [2021-12-17 01:28:29,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:28:29" (1/1) ... [2021-12-17 01:28:29,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 01:28:29,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 01:28:29,531 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 01:28:29,531 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 01:28:29,532 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:28:29" (1/1) ... [2021-12-17 01:28:29,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 01:28:29,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:28:29,554 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) [2021-12-17 01:28:29,559 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 [2021-12-17 01:28:29,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 01:28:29,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 01:28:29,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 01:28:29,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 01:28:29,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 01:28:29,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 01:28:29,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 01:28:29,631 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 01:28:29,633 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 01:28:29,728 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 01:28:29,733 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 01:28:29,733 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-17 01:28:29,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 01:28:29 BoogieIcfgContainer [2021-12-17 01:28:29,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 01:28:29,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 01:28:29,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 01:28:29,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 01:28:29,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 01:28:29" (1/3) ... [2021-12-17 01:28:29,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68bb5151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 01:28:29, skipping insertion in model container [2021-12-17 01:28:29,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:28:29" (2/3) ... [2021-12-17 01:28:29,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68bb5151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 01:28:29, skipping insertion in model container [2021-12-17 01:28:29,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 01:28:29" (3/3) ... [2021-12-17 01:28:29,742 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn1f.c [2021-12-17 01:28:29,745 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 01:28:29,745 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 01:28:29,774 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 01:28:29,778 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 [2021-12-17 01:28:29,779 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 01:28:29,786 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:29,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-17 01:28:29,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:28:29,790 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:28:29,790 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:28:29,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:28:29,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-12-17 01:28:29,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:28:29,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222473041] [2021-12-17 01:28:29,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:28:29,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:28:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:28:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:28:29,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:28:29,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222473041] [2021-12-17 01:28:29,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222473041] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 01:28:29,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 01:28:29,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 01:28:29,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410703391] [2021-12-17 01:28:29,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 01:28:29,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 01:28:29,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:28:29,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 01:28:29,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 01:28:29,936 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:29,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:28:29,959 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-12-17 01:28:29,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 01:28:29,961 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-17 01:28:29,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:28:29,966 INFO L225 Difference]: With dead ends: 38 [2021-12-17 01:28:29,966 INFO L226 Difference]: Without dead ends: 17 [2021-12-17 01:28:29,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 01:28:29,977 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 01:28:29,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 01:28:29,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-17 01:28:30,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-12-17 01:28:30,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:30,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-12-17 01:28:30,020 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-12-17 01:28:30,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:28:30,020 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-12-17 01:28:30,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:30,021 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-12-17 01:28:30,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-17 01:28:30,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:28:30,027 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:28:30,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 01:28:30,028 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:28:30,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:28:30,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-12-17 01:28:30,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:28:30,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490196266] [2021-12-17 01:28:30,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:28:30,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:28:30,062 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 01:28:30,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011087732] [2021-12-17 01:28:30,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:28:30,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:28:30,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:28:30,064 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) [2021-12-17 01:28:30,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 01:28:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:28:30,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-17 01:28:30,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:28:30,180 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-17 01:28:30,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2021-12-17 01:28:30,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-17 01:28:30,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-17 01:28:30,349 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-17 01:28:30,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-17 01:28:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:28:30,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 01:28:30,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:28:30,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490196266] [2021-12-17 01:28:30,459 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 01:28:30,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011087732] [2021-12-17 01:28:30,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011087732] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 01:28:30,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 01:28:30,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 01:28:30,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699283045] [2021-12-17 01:28:30,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 01:28:30,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 01:28:30,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:28:30,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 01:28:30,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 01:28:30,466 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:30,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:28:30,529 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-12-17 01:28:30,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 01:28:30,530 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-17 01:28:30,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:28:30,531 INFO L225 Difference]: With dead ends: 34 [2021-12-17 01:28:30,532 INFO L226 Difference]: Without dead ends: 32 [2021-12-17 01:28:30,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-17 01:28:30,535 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 01:28:30,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 56 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 01:28:30,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-17 01:28:30,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-12-17 01:28:30,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:30,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-12-17 01:28:30,546 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-12-17 01:28:30,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:28:30,546 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-12-17 01:28:30,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:30,547 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-12-17 01:28:30,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-17 01:28:30,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:28:30,551 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:28:30,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 01:28:30,773 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 [2021-12-17 01:28:30,776 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:28:30,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:28:30,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2021-12-17 01:28:30,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:28:30,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814056551] [2021-12-17 01:28:30,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:28:30,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:28:30,821 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 01:28:30,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587551844] [2021-12-17 01:28:30,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:28:30,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:28:30,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:28:30,827 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) [2021-12-17 01:28:30,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 01:28:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:28:30,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 01:28:30,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:28:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:28:30,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 01:28:30,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:28:30,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814056551] [2021-12-17 01:28:30,907 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 01:28:30,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587551844] [2021-12-17 01:28:30,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587551844] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 01:28:30,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 01:28:30,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 01:28:30,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733678852] [2021-12-17 01:28:30,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 01:28:30,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 01:28:30,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:28:30,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 01:28:30,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 01:28:30,909 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:30,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:28:30,950 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-12-17 01:28:30,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 01:28:30,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-17 01:28:30,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:28:30,952 INFO L225 Difference]: With dead ends: 49 [2021-12-17 01:28:30,952 INFO L226 Difference]: Without dead ends: 40 [2021-12-17 01:28:30,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-17 01:28:30,953 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 01:28:30,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 29 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 01:28:30,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-17 01:28:30,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2021-12-17 01:28:30,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:30,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-12-17 01:28:30,956 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-12-17 01:28:30,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:28:30,956 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-12-17 01:28:30,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:30,957 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-12-17 01:28:30,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-17 01:28:30,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:28:30,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:28:30,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 01:28:31,163 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,SelfDestructingSolverStorable2 [2021-12-17 01:28:31,165 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:28:31,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:28:31,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2021-12-17 01:28:31,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:28:31,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029944611] [2021-12-17 01:28:31,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:28:31,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:28:31,198 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 01:28:31,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639252903] [2021-12-17 01:28:31,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:28:31,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:28:31,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:28:31,200 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) [2021-12-17 01:28:31,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 01:28:31,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:28:31,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 01:28:31,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:28:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:28:31,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:28:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:28:31,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:28:31,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029944611] [2021-12-17 01:28:31,322 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 01:28:31,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639252903] [2021-12-17 01:28:31,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639252903] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:28:31,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:28:31,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-12-17 01:28:31,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033534742] [2021-12-17 01:28:31,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:28:31,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 01:28:31,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:28:31,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 01:28:31,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 01:28:31,332 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:31,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:28:31,406 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-12-17 01:28:31,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 01:28:31,406 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-17 01:28:31,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:28:31,408 INFO L225 Difference]: With dead ends: 44 [2021-12-17 01:28:31,408 INFO L226 Difference]: Without dead ends: 37 [2021-12-17 01:28:31,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-12-17 01:28:31,410 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 01:28:31,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 46 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 01:28:31,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-17 01:28:31,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2021-12-17 01:28:31,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:31,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-17 01:28:31,428 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-12-17 01:28:31,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:28:31,428 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-17 01:28:31,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:31,429 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-17 01:28:31,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 01:28:31,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:28:31,430 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:28:31,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 01:28:31,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:28:31,649 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:28:31,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:28:31,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2021-12-17 01:28:31,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:28:31,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184421013] [2021-12-17 01:28:31,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:28:31,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:28:31,662 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 01:28:31,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [613602800] [2021-12-17 01:28:31,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:28:31,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:28:31,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:28:31,674 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) [2021-12-17 01:28:31,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 01:28:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:28:31,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 01:28:31,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:28:31,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:28:31,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 01:28:31,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:28:31,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184421013] [2021-12-17 01:28:31,773 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 01:28:31,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613602800] [2021-12-17 01:28:31,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613602800] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 01:28:31,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 01:28:31,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 01:28:31,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065377873] [2021-12-17 01:28:31,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 01:28:31,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 01:28:31,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:28:31,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 01:28:31,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-17 01:28:31,775 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:31,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:28:31,830 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-12-17 01:28:31,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 01:28:31,830 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-17 01:28:31,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:28:31,831 INFO L225 Difference]: With dead ends: 41 [2021-12-17 01:28:31,831 INFO L226 Difference]: Without dead ends: 27 [2021-12-17 01:28:31,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-12-17 01:28:31,833 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 01:28:31,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 01:28:31,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-17 01:28:31,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-12-17 01:28:31,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:31,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-12-17 01:28:31,837 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-12-17 01:28:31,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:28:31,838 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-12-17 01:28:31,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:31,838 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-12-17 01:28:31,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 01:28:31,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:28:31,838 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:28:31,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 01:28:32,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:28:32,051 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:28:32,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:28:32,052 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-12-17 01:28:32,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:28:32,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245845325] [2021-12-17 01:28:32,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:28:32,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:28:32,064 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 01:28:32,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463391516] [2021-12-17 01:28:32,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:28:32,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:28:32,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:28:32,068 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) [2021-12-17 01:28:32,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 01:28:32,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:28:32,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 01:28:32,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:28:32,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-17 01:28:32,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:28:32,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-17 01:28:32,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-17 01:28:32,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-17 01:28:32,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:28:32,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-17 01:28:32,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:28:32,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:28:32,296 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_148 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_148) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) is different from false [2021-12-17 01:28:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-12-17 01:28:32,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:28:32,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245845325] [2021-12-17 01:28:32,308 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 01:28:32,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463391516] [2021-12-17 01:28:32,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463391516] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:28:32,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:28:32,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-12-17 01:28:32,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035695941] [2021-12-17 01:28:32,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:28:32,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 01:28:32,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:28:32,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 01:28:32,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=64, Unknown=1, NotChecked=16, Total=110 [2021-12-17 01:28:32,324 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:32,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:28:32,433 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-12-17 01:28:32,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 01:28:32,433 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-17 01:28:32,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:28:32,434 INFO L225 Difference]: With dead ends: 40 [2021-12-17 01:28:32,434 INFO L226 Difference]: Without dead ends: 38 [2021-12-17 01:28:32,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=124, Unknown=1, NotChecked=24, Total=210 [2021-12-17 01:28:32,435 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 47 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:28:32,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 84 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 55 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2021-12-17 01:28:32,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-17 01:28:32,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 24. [2021-12-17 01:28:32,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:32,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-17 01:28:32,438 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2021-12-17 01:28:32,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:28:32,438 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-17 01:28:32,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:32,438 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-17 01:28:32,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-17 01:28:32,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:28:32,442 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:28:32,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 01:28:32,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:28:32,656 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:28:32,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:28:32,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1267903976, now seen corresponding path program 2 times [2021-12-17 01:28:32,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:28:32,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332261958] [2021-12-17 01:28:32,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:28:32,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:28:32,692 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 01:28:32,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1722350100] [2021-12-17 01:28:32,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 01:28:32,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:28:32,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:28:32,699 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) [2021-12-17 01:28:32,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 01:28:32,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 01:28:32,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:28:32,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 01:28:32,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:28:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:28:32,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:28:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:28:32,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:28:32,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332261958] [2021-12-17 01:28:32,820 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 01:28:32,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722350100] [2021-12-17 01:28:32,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722350100] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:28:32,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:28:32,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-17 01:28:32,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313712656] [2021-12-17 01:28:32,821 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:28:32,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 01:28:32,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:28:32,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 01:28:32,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-17 01:28:32,822 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:32,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:28:32,892 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-12-17 01:28:32,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 01:28:32,893 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-17 01:28:32,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:28:32,895 INFO L225 Difference]: With dead ends: 60 [2021-12-17 01:28:32,895 INFO L226 Difference]: Without dead ends: 51 [2021-12-17 01:28:32,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-12-17 01:28:32,896 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 01:28:32,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 34 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 01:28:32,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-17 01:28:32,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2021-12-17 01:28:32,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:32,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-12-17 01:28:32,905 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2021-12-17 01:28:32,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:28:32,905 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-12-17 01:28:32,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:32,905 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-12-17 01:28:32,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-17 01:28:32,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:28:32,906 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:28:32,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 01:28:33,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:28:33,123 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:28:33,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:28:33,124 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2021-12-17 01:28:33,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:28:33,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785131511] [2021-12-17 01:28:33,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:28:33,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:28:33,159 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 01:28:33,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302106337] [2021-12-17 01:28:33,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:28:33,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:28:33,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:28:33,161 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:28:33,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 01:28:33,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:28:33,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 01:28:33,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:28:33,233 INFO L354 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2021-12-17 01:28:33,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2021-12-17 01:28:33,258 INFO L354 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2021-12-17 01:28:33,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 72 [2021-12-17 01:28:33,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-17 01:28:33,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-17 01:28:33,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-17 01:28:33,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-17 01:28:33,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-17 01:28:33,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-17 01:28:33,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-17 01:28:33,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:28:33,381 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-17 01:28:33,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-12-17 01:28:33,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:28:33,438 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-17 01:28:33,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2021-12-17 01:28:33,559 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-17 01:28:33,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 32 [2021-12-17 01:28:33,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:28:33,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:28:33,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:28:33,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:28:33,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785131511] [2021-12-17 01:28:33,692 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 01:28:33,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302106337] [2021-12-17 01:28:33,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302106337] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:28:33,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:28:33,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-12-17 01:28:33,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616154421] [2021-12-17 01:28:33,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:28:33,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 01:28:33,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:28:33,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 01:28:33,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-17 01:28:33,693 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:33,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:28:33,762 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-12-17 01:28:33,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 01:28:33,762 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-17 01:28:33,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:28:33,762 INFO L225 Difference]: With dead ends: 39 [2021-12-17 01:28:33,762 INFO L226 Difference]: Without dead ends: 37 [2021-12-17 01:28:33,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-12-17 01:28:33,763 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 01:28:33,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 92 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 32 Unchecked, 0.0s Time] [2021-12-17 01:28:33,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-17 01:28:33,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-12-17 01:28:33,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:33,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-12-17 01:28:33,766 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 20 [2021-12-17 01:28:33,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:28:33,767 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-12-17 01:28:33,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:33,767 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-12-17 01:28:33,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-17 01:28:33,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:28:33,767 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:28:33,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 01:28:33,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:28:33,979 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:28:33,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:28:33,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 3 times [2021-12-17 01:28:33,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:28:33,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679236682] [2021-12-17 01:28:33,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:28:33,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:28:33,993 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 01:28:33,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [687972100] [2021-12-17 01:28:33,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 01:28:33,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:28:33,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:28:33,995 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:28:33,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 01:28:34,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 01:28:34,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:28:34,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 01:28:34,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:28:34,076 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-17 01:28:34,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2021-12-17 01:28:34,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-17 01:28:34,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-17 01:28:34,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-17 01:28:34,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 01:28:34,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-17 01:28:34,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-17 01:28:34,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-17 01:28:34,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-17 01:28:34,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:28:34,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-17 01:28:34,253 INFO L354 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2021-12-17 01:28:34,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 28 [2021-12-17 01:28:34,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:28:34,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:28:36,414 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (forall ((v_ArrVal_275 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8)) v_ArrVal_275) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) (< (+ |ULTIMATE.start_main_~i~0#1| 1) c_~N~0))) is different from false [2021-12-17 01:28:37,195 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_48| Int) (v_ArrVal_275 Int) (v_ArrVal_272 (Array Int Int)) (v_ArrVal_273 Int)) (or (<= (+ |v_ULTIMATE.start_main_~i~0#1_48| 1) |c_ULTIMATE.start_main_~i~0#1|) (= (select (store (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_272) |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| 8) v_ArrVal_273) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_48| 8)) v_ArrVal_275) |c_ULTIMATE.start_main_~b~0#1.offset|) 1))) is different from false [2021-12-17 01:28:37,223 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_48| Int) (v_ArrVal_275 Int) (v_ArrVal_272 (Array Int Int)) (v_ArrVal_273 Int)) (or (= (select (store (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_272) |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| 8) v_ArrVal_273) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_48| 8)) v_ArrVal_275) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (<= |v_ULTIMATE.start_main_~i~0#1_48| |c_ULTIMATE.start_main_~i~0#1|))) is different from false [2021-12-17 01:28:37,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-12-17 01:28:37,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:28:37,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679236682] [2021-12-17 01:28:37,260 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 01:28:37,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687972100] [2021-12-17 01:28:37,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687972100] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:28:37,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:28:37,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-12-17 01:28:37,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452414483] [2021-12-17 01:28:37,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:28:37,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 01:28:37,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:28:37,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 01:28:37,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=194, Unknown=5, NotChecked=96, Total=380 [2021-12-17 01:28:37,266 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:39,352 WARN L838 $PredicateComparison]: unable to prove that (and (< 2 c_~N~0) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (forall ((v_ArrVal_275 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8)) v_ArrVal_275) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) (< (+ |ULTIMATE.start_main_~i~0#1| 1) c_~N~0))) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (<= 1 |c_ULTIMATE.start_main_~i~0#1|) (= |c_ULTIMATE.start_main_~i~0#1| 1)) is different from false [2021-12-17 01:28:41,357 WARN L838 $PredicateComparison]: unable to prove that (and (< 2 c_~N~0) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (forall ((v_ArrVal_275 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8)) v_ArrVal_275) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) (< (+ |ULTIMATE.start_main_~i~0#1| 1) c_~N~0))) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) is different from false [2021-12-17 01:28:41,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:28:41,456 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2021-12-17 01:28:41,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 01:28:41,457 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-17 01:28:41,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:28:41,458 INFO L225 Difference]: With dead ends: 61 [2021-12-17 01:28:41,458 INFO L226 Difference]: Without dead ends: 59 [2021-12-17 01:28:41,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=165, Invalid=400, Unknown=7, NotChecked=240, Total=812 [2021-12-17 01:28:41,458 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 62 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:28:41,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 84 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 128 Invalid, 0 Unknown, 150 Unchecked, 0.1s Time] [2021-12-17 01:28:41,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-17 01:28:41,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 39. [2021-12-17 01:28:41,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:41,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-12-17 01:28:41,462 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 20 [2021-12-17 01:28:41,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:28:41,462 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-12-17 01:28:41,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:41,462 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-12-17 01:28:41,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-17 01:28:41,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:28:41,463 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:28:41,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 01:28:41,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-17 01:28:41,664 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:28:41,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:28:41,664 INFO L85 PathProgramCache]: Analyzing trace with hash 986773582, now seen corresponding path program 2 times [2021-12-17 01:28:41,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:28:41,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823555486] [2021-12-17 01:28:41,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:28:41,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:28:41,675 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 01:28:41,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [762254342] [2021-12-17 01:28:41,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 01:28:41,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:28:41,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:28:41,689 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:28:41,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 01:28:41,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 01:28:41,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:28:41,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 01:28:41,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:28:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 01:28:41,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:28:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 01:28:41,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:28:41,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823555486] [2021-12-17 01:28:41,847 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 01:28:41,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762254342] [2021-12-17 01:28:41,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762254342] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:28:41,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:28:41,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-17 01:28:41,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798460532] [2021-12-17 01:28:41,847 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:28:41,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 01:28:41,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:28:41,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 01:28:41,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-17 01:28:41,848 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:41,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:28:41,936 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2021-12-17 01:28:41,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 01:28:41,937 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-17 01:28:41,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:28:41,937 INFO L225 Difference]: With dead ends: 68 [2021-12-17 01:28:41,937 INFO L226 Difference]: Without dead ends: 59 [2021-12-17 01:28:41,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-12-17 01:28:41,938 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 01:28:41,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 71 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 01:28:41,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-17 01:28:41,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 39. [2021-12-17 01:28:41,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:41,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-12-17 01:28:41,942 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 22 [2021-12-17 01:28:41,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:28:41,942 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-12-17 01:28:41,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:41,942 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-12-17 01:28:41,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-17 01:28:41,943 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:28:41,943 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:28:41,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-17 01:28:42,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 01:28:42,159 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:28:42,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:28:42,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1197174726, now seen corresponding path program 3 times [2021-12-17 01:28:42,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:28:42,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426847893] [2021-12-17 01:28:42,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:28:42,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:28:42,169 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 01:28:42,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596124942] [2021-12-17 01:28:42,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 01:28:42,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:28:42,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:28:42,171 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:28:42,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 01:28:42,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 01:28:42,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:28:42,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 01:28:42,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:28:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 01:28:42,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:28:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 01:28:42,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:28:42,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426847893] [2021-12-17 01:28:42,385 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 01:28:42,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596124942] [2021-12-17 01:28:42,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596124942] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:28:42,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:28:42,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-12-17 01:28:42,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66427641] [2021-12-17 01:28:42,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:28:42,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 01:28:42,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:28:42,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 01:28:42,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-17 01:28:42,386 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:42,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:28:42,472 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2021-12-17 01:28:42,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 01:28:42,472 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-17 01:28:42,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:28:42,473 INFO L225 Difference]: With dead ends: 63 [2021-12-17 01:28:42,473 INFO L226 Difference]: Without dead ends: 43 [2021-12-17 01:28:42,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-12-17 01:28:42,474 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 01:28:42,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 60 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 01:28:42,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-17 01:28:42,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2021-12-17 01:28:42,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:42,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-12-17 01:28:42,480 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 24 [2021-12-17 01:28:42,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:28:42,481 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-12-17 01:28:42,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:42,481 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-12-17 01:28:42,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-17 01:28:42,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:28:42,482 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:28:42,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 01:28:42,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-17 01:28:42,701 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:28:42,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:28:42,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1232945932, now seen corresponding path program 4 times [2021-12-17 01:28:42,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:28:42,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074593121] [2021-12-17 01:28:42,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:28:42,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:28:42,712 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 01:28:42,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730662440] [2021-12-17 01:28:42,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 01:28:42,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:28:42,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:28:42,716 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:28:42,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 01:28:42,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 01:28:42,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:28:42,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-17 01:28:42,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:28:42,804 INFO L354 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2021-12-17 01:28:42,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2021-12-17 01:28:42,833 INFO L354 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2021-12-17 01:28:42,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 72 [2021-12-17 01:28:42,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-17 01:28:42,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-17 01:28:42,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-17 01:28:42,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-17 01:28:42,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 23 [2021-12-17 01:28:42,914 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-17 01:28:42,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-17 01:28:42,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:28:42,957 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-17 01:28:42,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-12-17 01:28:42,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:28:43,000 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-17 01:28:43,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-12-17 01:28:43,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:28:43,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:28:43,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:28:43,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 01:28:43,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 01:28:43,043 INFO L354 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2021-12-17 01:28:43,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 57 [2021-12-17 01:28:43,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:28:43,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:28:43,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:28:43,105 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-17 01:28:43,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 51 [2021-12-17 01:28:43,225 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-17 01:28:43,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 32 [2021-12-17 01:28:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:28:43,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:28:45,431 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_81| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_81| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_389 Int) (v_ArrVal_393 Int)) (= (let ((.cse1 (+ |c_ULTIMATE.start_main_~b~0#1.offset| 8))) (select (store (let ((.cse2 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_81| 8)) v_ArrVal_389))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~b~0#1.base|))) (store .cse0 .cse1 (+ (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|) (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (+ |c_ULTIMATE.start_main_~b~0#1.offset| 16) v_ArrVal_393) .cse1)) 3)))) is different from false [2021-12-17 01:28:52,782 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-12-17 01:28:52,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:28:52,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074593121] [2021-12-17 01:28:52,783 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 01:28:52,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730662440] [2021-12-17 01:28:52,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730662440] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:28:52,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:28:52,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-12-17 01:28:52,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462018482] [2021-12-17 01:28:52,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:28:52,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 01:28:52,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:28:52,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 01:28:52,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=272, Unknown=7, NotChecked=34, Total=380 [2021-12-17 01:28:52,784 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:54,794 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 2) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (= |c_ULTIMATE.start_main_~i~0#1| 1) (forall ((|v_ULTIMATE.start_main_~i~0#1_81| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_81| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_389 Int) (v_ArrVal_393 Int)) (= (let ((.cse1 (+ |c_ULTIMATE.start_main_~b~0#1.offset| 8))) (select (store (let ((.cse2 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_81| 8)) v_ArrVal_389))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~b~0#1.base|))) (store .cse0 .cse1 (+ (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|) (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (+ |c_ULTIMATE.start_main_~b~0#1.offset| 16) v_ArrVal_393) .cse1)) 3))))) is different from false [2021-12-17 01:28:56,801 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 2) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (forall ((|v_ULTIMATE.start_main_~i~0#1_81| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_81| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_389 Int) (v_ArrVal_393 Int)) (= (let ((.cse1 (+ |c_ULTIMATE.start_main_~b~0#1.offset| 8))) (select (store (let ((.cse2 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_81| 8)) v_ArrVal_389))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~b~0#1.base|))) (store .cse0 .cse1 (+ (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|) (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (+ |c_ULTIMATE.start_main_~b~0#1.offset| 16) v_ArrVal_393) .cse1)) 3))))) is different from false [2021-12-17 01:28:56,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:28:56,940 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2021-12-17 01:28:56,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-17 01:28:56,940 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-17 01:28:56,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:28:56,941 INFO L225 Difference]: With dead ends: 63 [2021-12-17 01:28:56,941 INFO L226 Difference]: Without dead ends: 61 [2021-12-17 01:28:56,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=108, Invalid=447, Unknown=9, NotChecked=138, Total=702 [2021-12-17 01:28:56,942 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 01:28:56,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 77 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 64 Unchecked, 0.0s Time] [2021-12-17 01:28:56,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-17 01:28:56,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2021-12-17 01:28:56,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:56,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-12-17 01:28:56,945 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 24 [2021-12-17 01:28:56,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:28:56,946 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-12-17 01:28:56,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:56,946 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-12-17 01:28:56,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-17 01:28:56,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:28:56,947 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:28:56,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 01:28:57,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 01:28:57,147 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:28:57,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:28:57,148 INFO L85 PathProgramCache]: Analyzing trace with hash -900609774, now seen corresponding path program 4 times [2021-12-17 01:28:57,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:28:57,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979886437] [2021-12-17 01:28:57,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:28:57,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:28:57,160 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 01:28:57,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203700951] [2021-12-17 01:28:57,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 01:28:57,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:28:57,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:28:57,179 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:28:57,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 01:28:57,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 01:28:57,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:28:57,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 01:28:57,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:28:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 01:28:57,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:28:57,358 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 01:28:57,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:28:57,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979886437] [2021-12-17 01:28:57,359 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 01:28:57,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203700951] [2021-12-17 01:28:57,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203700951] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:28:57,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:28:57,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-17 01:28:57,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437501844] [2021-12-17 01:28:57,360 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:28:57,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 01:28:57,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:28:57,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 01:28:57,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-17 01:28:57,361 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:57,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:28:57,485 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2021-12-17 01:28:57,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 01:28:57,485 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-17 01:28:57,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:28:57,486 INFO L225 Difference]: With dead ends: 102 [2021-12-17 01:28:57,486 INFO L226 Difference]: Without dead ends: 84 [2021-12-17 01:28:57,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-12-17 01:28:57,486 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 62 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:28:57,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 80 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 01:28:57,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-17 01:28:57,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 51. [2021-12-17 01:28:57,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.16) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:57,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2021-12-17 01:28:57,490 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 24 [2021-12-17 01:28:57,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:28:57,490 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2021-12-17 01:28:57,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:57,490 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2021-12-17 01:28:57,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-17 01:28:57,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:28:57,491 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:28:57,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 01:28:57,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 01:28:57,691 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:28:57,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:28:57,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1983767408, now seen corresponding path program 5 times [2021-12-17 01:28:57,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:28:57,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642147975] [2021-12-17 01:28:57,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:28:57,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:28:57,702 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 01:28:57,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1748310266] [2021-12-17 01:28:57,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 01:28:57,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:28:57,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:28:57,704 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:28:57,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 01:28:57,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-17 01:28:57,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:28:57,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 01:28:57,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:28:57,877 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:28:57,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:28:57,939 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 01:28:57,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:28:57,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642147975] [2021-12-17 01:28:57,939 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 01:28:57,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748310266] [2021-12-17 01:28:57,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748310266] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:28:57,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:28:57,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-12-17 01:28:57,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498869464] [2021-12-17 01:28:57,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:28:57,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 01:28:57,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:28:57,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 01:28:57,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-12-17 01:28:57,941 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:58,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:28:58,171 INFO L93 Difference]: Finished difference Result 124 states and 133 transitions. [2021-12-17 01:28:58,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-17 01:28:58,171 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-17 01:28:58,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:28:58,172 INFO L225 Difference]: With dead ends: 124 [2021-12-17 01:28:58,172 INFO L226 Difference]: Without dead ends: 112 [2021-12-17 01:28:58,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=680, Unknown=0, NotChecked=0, Total=930 [2021-12-17 01:28:58,173 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 166 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:28:58,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 103 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 01:28:58,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-17 01:28:58,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 66. [2021-12-17 01:28:58,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 65 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:58,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2021-12-17 01:28:58,178 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 26 [2021-12-17 01:28:58,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:28:58,178 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2021-12-17 01:28:58,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 01:28:58,179 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2021-12-17 01:28:58,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-17 01:28:58,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:28:58,179 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:28:58,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-17 01:28:58,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-17 01:28:58,395 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:28:58,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:28:58,396 INFO L85 PathProgramCache]: Analyzing trace with hash -55017726, now seen corresponding path program 5 times [2021-12-17 01:28:58,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:28:58,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761246255] [2021-12-17 01:28:58,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:28:58,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:28:58,404 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 01:28:58,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831771788] [2021-12-17 01:28:58,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 01:28:58,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:28:58,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:28:58,409 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:28:58,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-17 01:28:58,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-17 01:28:58,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-12-17 01:28:58,481 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-17 01:28:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 01:28:58,518 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-17 01:28:58,518 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-17 01:28:58,519 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 01:28:58,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-17 01:28:58,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:28:58,723 INFO L732 BasicCegarLoop]: Path program histogram: [5, 5, 1, 1, 1, 1, 1] [2021-12-17 01:28:58,725 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 01:28:58,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 01:28:58 BoogieIcfgContainer [2021-12-17 01:28:58,763 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 01:28:58,764 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 01:28:58,764 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 01:28:58,764 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 01:28:58,764 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 01:28:29" (3/4) ... [2021-12-17 01:28:58,765 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-17 01:28:58,807 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 01:28:58,808 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 01:28:58,808 INFO L158 Benchmark]: Toolchain (without parser) took 29574.18ms. Allocated memory was 100.7MB in the beginning and 167.8MB in the end (delta: 67.1MB). Free memory was 71.1MB in the beginning and 73.3MB in the end (delta: -2.3MB). Peak memory consumption was 64.1MB. Max. memory is 16.1GB. [2021-12-17 01:28:58,809 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 100.7MB. Free memory was 57.5MB in the beginning and 57.5MB in the end (delta: 42.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 01:28:58,809 INFO L158 Benchmark]: CACSL2BoogieTranslator took 235.49ms. Allocated memory is still 100.7MB. Free memory was 70.9MB in the beginning and 75.3MB in the end (delta: -4.5MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. [2021-12-17 01:28:58,809 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.69ms. Allocated memory is still 100.7MB. Free memory was 75.0MB in the beginning and 73.5MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 01:28:58,809 INFO L158 Benchmark]: Boogie Preprocessor took 19.66ms. Allocated memory is still 100.7MB. Free memory was 73.5MB in the beginning and 72.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 01:28:58,809 INFO L158 Benchmark]: RCFGBuilder took 203.71ms. Allocated memory is still 100.7MB. Free memory was 72.2MB in the beginning and 62.0MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-17 01:28:58,810 INFO L158 Benchmark]: TraceAbstraction took 29027.24ms. Allocated memory was 100.7MB in the beginning and 167.8MB in the end (delta: 67.1MB). Free memory was 61.7MB in the beginning and 75.4MB in the end (delta: -13.7MB). Peak memory consumption was 52.3MB. Max. memory is 16.1GB. [2021-12-17 01:28:58,810 INFO L158 Benchmark]: Witness Printer took 44.34ms. Allocated memory is still 167.8MB. Free memory was 75.4MB in the beginning and 73.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 01:28:58,812 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 100.7MB. Free memory was 57.5MB in the beginning and 57.5MB in the end (delta: 42.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 235.49ms. Allocated memory is still 100.7MB. Free memory was 70.9MB in the beginning and 75.3MB in the end (delta: -4.5MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.69ms. Allocated memory is still 100.7MB. Free memory was 75.0MB in the beginning and 73.5MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 19.66ms. Allocated memory is still 100.7MB. Free memory was 73.5MB in the beginning and 72.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 203.71ms. Allocated memory is still 100.7MB. Free memory was 72.2MB in the beginning and 62.0MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 29027.24ms. Allocated memory was 100.7MB in the beginning and 167.8MB in the end (delta: 67.1MB). Free memory was 61.7MB in the beginning and 75.4MB in the end (delta: -13.7MB). Peak memory consumption was 52.3MB. Max. memory is 16.1GB. * Witness Printer took 44.34ms. Allocated memory is still 167.8MB. Free memory was 75.4MB in the beginning and 73.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. 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: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, N=3] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 2 [L32] b[0] = 1 [L33] i=1 VAL [a={-1:0}, b={-2:0}, i=1, N=3] [L33] COND TRUE i