./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/nla-digbench-scaling/hard-ll_unwindbound10.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 c8cdca66dc863bfa94d37a0903946c6b89240a08b13e8fd34226289180db2a40 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 16:36:32,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 16:36:32,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 16:36:32,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 16:36:32,597 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 16:36:32,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 16:36:32,600 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 16:36:32,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 16:36:32,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 16:36:32,604 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 16:36:32,605 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 16:36:32,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 16:36:32,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 16:36:32,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 16:36:32,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 16:36:32,609 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 16:36:32,610 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 16:36:32,611 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 16:36:32,612 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 16:36:32,614 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 16:36:32,615 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 16:36:32,616 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 16:36:32,617 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 16:36:32,618 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 16:36:32,619 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 16:36:32,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 16:36:32,622 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 16:36:32,622 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 16:36:32,623 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 16:36:32,624 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 16:36:32,625 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 16:36:32,625 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 16:36:32,626 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 16:36:32,626 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 16:36:32,627 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 16:36:32,628 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 16:36:32,628 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 16:36:32,629 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 16:36:32,629 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 16:36:32,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 16:36:32,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 16:36:32,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 16:36:32,636 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 16:36:32,660 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 16:36:32,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 16:36:32,661 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 16:36:32,661 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 16:36:32,662 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 16:36:32,662 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 16:36:32,663 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 16:36:32,663 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 16:36:32,663 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 16:36:32,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 16:36:32,664 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 16:36:32,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 16:36:32,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 16:36:32,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 16:36:32,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 16:36:32,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 16:36:32,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 16:36:32,666 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 16:36:32,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 16:36:32,666 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 16:36:32,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 16:36:32,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 16:36:32,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 16:36:32,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 16:36:32,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 16:36:32,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 16:36:32,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 16:36:32,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 16:36:32,673 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 16:36:32,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 16:36:32,674 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 16:36:32,674 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 16:36:32,674 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 16:36:32,674 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8cdca66dc863bfa94d37a0903946c6b89240a08b13e8fd34226289180db2a40 [2022-07-13 16:36:32,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 16:36:32,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 16:36:32,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 16:36:32,916 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 16:36:32,916 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 16:36:32,917 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound10.c [2022-07-13 16:36:32,973 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/811d30eb5/b6ce114eae1f4da59f928789c413e1d3/FLAG6b8a4c495 [2022-07-13 16:36:33,356 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 16:36:33,357 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound10.c [2022-07-13 16:36:33,362 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/811d30eb5/b6ce114eae1f4da59f928789c413e1d3/FLAG6b8a4c495 [2022-07-13 16:36:33,380 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/811d30eb5/b6ce114eae1f4da59f928789c413e1d3 [2022-07-13 16:36:33,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 16:36:33,386 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 16:36:33,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 16:36:33,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 16:36:33,390 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 16:36:33,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:36:33" (1/1) ... [2022-07-13 16:36:33,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2db860f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:36:33, skipping insertion in model container [2022-07-13 16:36:33,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:36:33" (1/1) ... [2022-07-13 16:36:33,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 16:36:33,415 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 16:36:33,551 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/nla-digbench-scaling/hard-ll_unwindbound10.c[538,551] [2022-07-13 16:36:33,569 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 16:36:33,574 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 16:36:33,582 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/nla-digbench-scaling/hard-ll_unwindbound10.c[538,551] [2022-07-13 16:36:33,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 16:36:33,597 INFO L208 MainTranslator]: Completed translation [2022-07-13 16:36:33,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:36:33 WrapperNode [2022-07-13 16:36:33,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 16:36:33,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 16:36:33,599 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 16:36:33,599 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 16:36:33,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:36:33" (1/1) ... [2022-07-13 16:36:33,614 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:36:33" (1/1) ... [2022-07-13 16:36:33,634 INFO L137 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-07-13 16:36:33,635 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 16:36:33,635 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 16:36:33,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 16:36:33,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 16:36:33,642 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:36:33" (1/1) ... [2022-07-13 16:36:33,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:36:33" (1/1) ... [2022-07-13 16:36:33,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:36:33" (1/1) ... [2022-07-13 16:36:33,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:36:33" (1/1) ... [2022-07-13 16:36:33,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:36:33" (1/1) ... [2022-07-13 16:36:33,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:36:33" (1/1) ... [2022-07-13 16:36:33,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:36:33" (1/1) ... [2022-07-13 16:36:33,678 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 16:36:33,680 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 16:36:33,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 16:36:33,681 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 16:36:33,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:36:33" (1/1) ... [2022-07-13 16:36:33,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 16:36:33,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:36:33,729 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) [2022-07-13 16:36:33,756 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 [2022-07-13 16:36:33,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 16:36:33,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 16:36:33,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 16:36:33,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 16:36:33,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 16:36:33,772 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 16:36:33,814 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 16:36:33,816 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 16:36:33,926 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 16:36:33,931 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 16:36:33,932 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 16:36:33,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:36:33 BoogieIcfgContainer [2022-07-13 16:36:33,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 16:36:33,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 16:36:33,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 16:36:33,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 16:36:33,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 04:36:33" (1/3) ... [2022-07-13 16:36:33,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c1079d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 04:36:33, skipping insertion in model container [2022-07-13 16:36:33,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:36:33" (2/3) ... [2022-07-13 16:36:33,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c1079d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 04:36:33, skipping insertion in model container [2022-07-13 16:36:33,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:36:33" (3/3) ... [2022-07-13 16:36:33,940 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound10.c [2022-07-13 16:36:33,951 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 16:36:33,952 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 16:36:34,003 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 16:36:34,009 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4c1c962c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2445def9 [2022-07-13 16:36:34,009 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 16:36:34,012 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-13 16:36:34,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-13 16:36:34,018 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:36:34,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:36:34,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:36:34,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:36:34,023 INFO L85 PathProgramCache]: Analyzing trace with hash -712527539, now seen corresponding path program 1 times [2022-07-13 16:36:34,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:36:34,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104892077] [2022-07-13 16:36:34,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:36:34,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:36:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:36:34,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 16:36:34,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:36:34,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104892077] [2022-07-13 16:36:34,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104892077] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:36:34,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:36:34,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 16:36:34,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127867492] [2022-07-13 16:36:34,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:36:34,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 16:36:34,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:36:34,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 16:36:34,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 16:36:34,162 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 16:36:34,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:36:34,178 INFO L93 Difference]: Finished difference Result 53 states and 87 transitions. [2022-07-13 16:36:34,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 16:36:34,181 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-13 16:36:34,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:36:34,188 INFO L225 Difference]: With dead ends: 53 [2022-07-13 16:36:34,188 INFO L226 Difference]: Without dead ends: 24 [2022-07-13 16:36:34,190 INFO L412 NwaCegarLoop]: 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 [2022-07-13 16:36:34,193 INFO L413 NwaCegarLoop]: 38 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, 38 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 [2022-07-13 16:36:34,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:36:34,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-13 16:36:34,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-13 16:36:34,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 16:36:34,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2022-07-13 16:36:34,231 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2022-07-13 16:36:34,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:36:34,231 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2022-07-13 16:36:34,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 16:36:34,232 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2022-07-13 16:36:34,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-13 16:36:34,233 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:36:34,233 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:36:34,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 16:36:34,233 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:36:34,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:36:34,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1983932575, now seen corresponding path program 1 times [2022-07-13 16:36:34,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:36:34,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744735165] [2022-07-13 16:36:34,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:36:34,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:36:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:36:34,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 16:36:34,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:36:34,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744735165] [2022-07-13 16:36:34,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744735165] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:36:34,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:36:34,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 16:36:34,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113509513] [2022-07-13 16:36:34,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:36:34,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:36:34,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:36:34,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:36:34,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:36:34,333 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 16:36:34,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:36:34,380 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2022-07-13 16:36:34,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 16:36:34,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-13 16:36:34,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:36:34,382 INFO L225 Difference]: With dead ends: 38 [2022-07-13 16:36:34,382 INFO L226 Difference]: Without dead ends: 36 [2022-07-13 16:36:34,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 16:36:34,384 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 15 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:36:34,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 106 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:36:34,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-13 16:36:34,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2022-07-13 16:36:34,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 16:36:34,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-07-13 16:36:34,393 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2022-07-13 16:36:34,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:36:34,394 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-07-13 16:36:34,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 16:36:34,394 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-07-13 16:36:34,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-13 16:36:34,395 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:36:34,395 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:36:34,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 16:36:34,396 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:36:34,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:36:34,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1787143384, now seen corresponding path program 1 times [2022-07-13 16:36:34,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:36:34,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855428290] [2022-07-13 16:36:34,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:36:34,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:36:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:36:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 16:36:34,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:36:34,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855428290] [2022-07-13 16:36:34,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855428290] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:36:34,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:36:34,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 16:36:34,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114368559] [2022-07-13 16:36:34,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:36:34,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 16:36:34,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:36:34,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 16:36:34,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 16:36:34,446 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 16:36:34,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:36:34,471 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2022-07-13 16:36:34,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 16:36:34,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-13 16:36:34,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:36:34,474 INFO L225 Difference]: With dead ends: 44 [2022-07-13 16:36:34,475 INFO L226 Difference]: Without dead ends: 30 [2022-07-13 16:36:34,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 16:36:34,476 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:36:34,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:36:34,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-13 16:36:34,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-13 16:36:34,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 16:36:34,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-07-13 16:36:34,483 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2022-07-13 16:36:34,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:36:34,483 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-07-13 16:36:34,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 16:36:34,484 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-07-13 16:36:34,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-13 16:36:34,484 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:36:34,484 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:36:34,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 16:36:34,485 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:36:34,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:36:34,486 INFO L85 PathProgramCache]: Analyzing trace with hash 472519838, now seen corresponding path program 1 times [2022-07-13 16:36:34,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:36:34,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400662017] [2022-07-13 16:36:34,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:36:34,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:36:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:36:34,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-13 16:36:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:36:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 16:36:34,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:36:34,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400662017] [2022-07-13 16:36:34,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400662017] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:36:34,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:36:34,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 16:36:34,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848225897] [2022-07-13 16:36:34,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:36:34,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:36:34,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:36:34,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:36:34,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:36:34,628 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 16:36:34,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:36:34,686 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-07-13 16:36:34,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 16:36:34,686 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-07-13 16:36:34,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:36:34,688 INFO L225 Difference]: With dead ends: 44 [2022-07-13 16:36:34,688 INFO L226 Difference]: Without dead ends: 42 [2022-07-13 16:36:34,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 16:36:34,690 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 13 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:36:34,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 102 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:36:34,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-13 16:36:34,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2022-07-13 16:36:34,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 16:36:34,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-07-13 16:36:34,698 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 15 [2022-07-13 16:36:34,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:36:34,699 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-07-13 16:36:34,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 16:36:34,699 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-07-13 16:36:34,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-13 16:36:34,700 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:36:34,700 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:36:34,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 16:36:34,701 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:36:34,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:36:34,701 INFO L85 PathProgramCache]: Analyzing trace with hash 838495553, now seen corresponding path program 1 times [2022-07-13 16:36:34,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:36:34,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440233436] [2022-07-13 16:36:34,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:36:34,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:36:34,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:36:34,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1863183045] [2022-07-13 16:36:34,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:36:34,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:36:34,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:36:34,717 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) [2022-07-13 16:36:34,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 16:36:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:36:34,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-13 16:36:34,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:36:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 16:36:34,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:36:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 16:36:35,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:36:35,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440233436] [2022-07-13 16:36:35,118 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:36:35,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863183045] [2022-07-13 16:36:35,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863183045] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:36:35,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:36:35,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-07-13 16:36:35,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303264225] [2022-07-13 16:36:35,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:36:35,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 16:36:35,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:36:35,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 16:36:35,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-07-13 16:36:35,121 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 13 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 16:36:35,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:36:35,489 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2022-07-13 16:36:35,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 16:36:35,490 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 20 [2022-07-13 16:36:35,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:36:35,492 INFO L225 Difference]: With dead ends: 75 [2022-07-13 16:36:35,492 INFO L226 Difference]: Without dead ends: 59 [2022-07-13 16:36:35,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-07-13 16:36:35,494 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 72 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 16:36:35,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 98 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 16:36:35,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-13 16:36:35,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2022-07-13 16:36:35,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 38 states have internal predecessors, (44), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-13 16:36:35,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2022-07-13 16:36:35,506 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 20 [2022-07-13 16:36:35,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:36:35,507 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2022-07-13 16:36:35,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 16:36:35,507 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2022-07-13 16:36:35,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 16:36:35,508 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:36:35,508 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:36:35,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 16:36:35,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:36:35,732 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:36:35,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:36:35,733 INFO L85 PathProgramCache]: Analyzing trace with hash 414140572, now seen corresponding path program 1 times [2022-07-13 16:36:35,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:36:35,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141084050] [2022-07-13 16:36:35,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:36:35,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:36:35,744 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:36:35,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023644598] [2022-07-13 16:36:35,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:36:35,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:36:35,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:36:35,746 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) [2022-07-13 16:36:35,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 16:36:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:36:35,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 16:36:35,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:36:35,820 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 16:36:35,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:36:35,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:36:35,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141084050] [2022-07-13 16:36:35,820 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:36:35,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023644598] [2022-07-13 16:36:35,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023644598] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:36:35,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:36:35,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 16:36:35,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877308389] [2022-07-13 16:36:35,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:36:35,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:36:35,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:36:35,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:36:35,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:36:35,823 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 16:36:35,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:36:35,848 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2022-07-13 16:36:35,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 16:36:35,849 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-07-13 16:36:35,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:36:35,850 INFO L225 Difference]: With dead ends: 72 [2022-07-13 16:36:35,850 INFO L226 Difference]: Without dead ends: 65 [2022-07-13 16:36:35,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:36:35,851 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:36:35,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 117 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:36:35,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-13 16:36:35,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-07-13 16:36:35,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 44 states have internal predecessors, (49), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-13 16:36:35,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-07-13 16:36:35,863 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 28 [2022-07-13 16:36:35,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:36:35,863 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-07-13 16:36:35,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 16:36:35,864 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-07-13 16:36:35,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 16:36:35,864 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:36:35,865 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:36:35,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 16:36:36,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-13 16:36:36,088 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:36:36,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:36:36,088 INFO L85 PathProgramCache]: Analyzing trace with hash 415868450, now seen corresponding path program 1 times [2022-07-13 16:36:36,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:36:36,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179377447] [2022-07-13 16:36:36,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:36:36,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:36:36,099 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:36:36,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516710742] [2022-07-13 16:36:36,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:36:36,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:36:36,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:36:36,109 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) [2022-07-13 16:36:36,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 16:36:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:36:36,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 16:36:36,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:36:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 16:36:36,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:36:36,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:36:36,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179377447] [2022-07-13 16:36:36,237 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:36:36,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516710742] [2022-07-13 16:36:36,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516710742] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:36:36,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:36:36,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 16:36:36,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169799689] [2022-07-13 16:36:36,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:36:36,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:36:36,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:36:36,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:36:36,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:36:36,239 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 16:36:36,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:36:36,301 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2022-07-13 16:36:36,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 16:36:36,302 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-07-13 16:36:36,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:36:36,305 INFO L225 Difference]: With dead ends: 79 [2022-07-13 16:36:36,306 INFO L226 Difference]: Without dead ends: 71 [2022-07-13 16:36:36,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 16:36:36,308 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:36:36,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 86 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:36:36,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-13 16:36:36,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-07-13 16:36:36,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 45 states have (on average 1.2) internal successors, (54), 49 states have internal predecessors, (54), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-13 16:36:36,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2022-07-13 16:36:36,321 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 28 [2022-07-13 16:36:36,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:36:36,321 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2022-07-13 16:36:36,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 16:36:36,321 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2022-07-13 16:36:36,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-13 16:36:36,322 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:36:36,322 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:36:36,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 16:36:36,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:36:36,536 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:36:36,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:36:36,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1091220578, now seen corresponding path program 1 times [2022-07-13 16:36:36,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:36:36,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539368595] [2022-07-13 16:36:36,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:36:36,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:36:36,554 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:36:36,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [404847498] [2022-07-13 16:36:36,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:36:36,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:36:36,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:36:36,564 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) [2022-07-13 16:36:36,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 16:36:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:36:36,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 16:36:36,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:36:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-13 16:36:36,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:36:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 16:36:36,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:36:36,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539368595] [2022-07-13 16:36:36,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:36:36,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404847498] [2022-07-13 16:36:36,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404847498] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:36:36,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:36:36,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-07-13 16:36:36,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893750107] [2022-07-13 16:36:36,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:36:36,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 16:36:36,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:36:36,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 16:36:36,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-13 16:36:36,690 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-13 16:36:36,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:36:36,807 INFO L93 Difference]: Finished difference Result 163 states and 196 transitions. [2022-07-13 16:36:36,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 16:36:36,808 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 35 [2022-07-13 16:36:36,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:36:36,810 INFO L225 Difference]: With dead ends: 163 [2022-07-13 16:36:36,811 INFO L226 Difference]: Without dead ends: 127 [2022-07-13 16:36:36,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-13 16:36:36,814 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 39 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:36:36,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 155 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 16:36:36,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-13 16:36:36,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2022-07-13 16:36:36,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 83 states have internal predecessors, (90), 26 states have call successors, (26), 16 states have call predecessors, (26), 15 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-13 16:36:36,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 139 transitions. [2022-07-13 16:36:36,854 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 139 transitions. Word has length 35 [2022-07-13 16:36:36,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:36:36,856 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 139 transitions. [2022-07-13 16:36:36,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-13 16:36:36,856 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 139 transitions. [2022-07-13 16:36:36,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 16:36:36,861 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:36:36,861 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:36:36,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 16:36:37,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:36:37,076 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:36:37,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:36:37,076 INFO L85 PathProgramCache]: Analyzing trace with hash -785132454, now seen corresponding path program 1 times [2022-07-13 16:36:37,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:36:37,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86820816] [2022-07-13 16:36:37,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:36:37,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:36:37,086 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:36:37,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450648465] [2022-07-13 16:36:37,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:36:37,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:36:37,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:36:37,088 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) [2022-07-13 16:36:37,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 16:36:37,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:36:37,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 16:36:37,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:36:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-13 16:36:37,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:36:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 16:36:37,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:36:37,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86820816] [2022-07-13 16:36:37,270 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:36:37,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450648465] [2022-07-13 16:36:37,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450648465] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:36:37,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:36:37,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-07-13 16:36:37,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597057551] [2022-07-13 16:36:37,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:36:37,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 16:36:37,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:36:37,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 16:36:37,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-13 16:36:37,277 INFO L87 Difference]: Start difference. First operand 120 states and 139 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-07-13 16:36:37,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:36:37,406 INFO L93 Difference]: Finished difference Result 234 states and 279 transitions. [2022-07-13 16:36:37,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 16:36:37,406 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 51 [2022-07-13 16:36:37,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:36:37,409 INFO L225 Difference]: With dead ends: 234 [2022-07-13 16:36:37,409 INFO L226 Difference]: Without dead ends: 213 [2022-07-13 16:36:37,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-07-13 16:36:37,412 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 85 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:36:37,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 244 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 16:36:37,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-07-13 16:36:37,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 208. [2022-07-13 16:36:37,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 138 states have (on average 1.1666666666666667) internal successors, (161), 146 states have internal predecessors, (161), 44 states have call successors, (44), 25 states have call predecessors, (44), 25 states have return successors, (40), 36 states have call predecessors, (40), 40 states have call successors, (40) [2022-07-13 16:36:37,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 245 transitions. [2022-07-13 16:36:37,443 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 245 transitions. Word has length 51 [2022-07-13 16:36:37,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:36:37,444 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 245 transitions. [2022-07-13 16:36:37,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-07-13 16:36:37,444 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 245 transitions. [2022-07-13 16:36:37,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-13 16:36:37,447 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:36:37,448 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:36:37,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 16:36:37,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:36:37,671 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:36:37,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:36:37,671 INFO L85 PathProgramCache]: Analyzing trace with hash 98519191, now seen corresponding path program 1 times [2022-07-13 16:36:37,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:36:37,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326518019] [2022-07-13 16:36:37,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:36:37,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:36:37,682 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:36:37,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712097368] [2022-07-13 16:36:37,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:36:37,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:36:37,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:36:37,684 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) [2022-07-13 16:36:37,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 16:36:37,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:36:37,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-13 16:36:37,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:36:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-13 16:36:38,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:37:07,606 WARN L233 SmtUtils]: Spent 17.69s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 16:38:19,197 WARN L233 SmtUtils]: Spent 17.16s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 16:39:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-13 16:39:37,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:39:37,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326518019] [2022-07-13 16:39:37,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:39:37,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712097368] [2022-07-13 16:39:37,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712097368] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:39:37,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:39:37,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-07-13 16:39:37,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099744975] [2022-07-13 16:39:37,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:39:37,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 16:39:37,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:39:37,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 16:39:37,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-07-13 16:39:37,715 INFO L87 Difference]: Start difference. First operand 208 states and 245 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 16 states have internal predecessors, (40), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-13 16:39:40,933 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:39:48,698 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:39:52,666 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:39:55,461 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:39:57,818 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:39:58,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:39:58,999 INFO L93 Difference]: Finished difference Result 335 states and 412 transitions. [2022-07-13 16:39:58,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 16:39:58,999 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 16 states have internal predecessors, (40), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 60 [2022-07-13 16:39:59,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:39:59,001 INFO L225 Difference]: With dead ends: 335 [2022-07-13 16:39:59,001 INFO L226 Difference]: Without dead ends: 268 [2022-07-13 16:39:59,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 41.9s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2022-07-13 16:39:59,002 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 69 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 102 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:39:59,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 201 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 593 Invalid, 5 Unknown, 0 Unchecked, 16.0s Time] [2022-07-13 16:39:59,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-07-13 16:39:59,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 246. [2022-07-13 16:39:59,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 167 states have (on average 1.155688622754491) internal successors, (193), 176 states have internal predecessors, (193), 50 states have call successors, (50), 29 states have call predecessors, (50), 28 states have return successors, (46), 40 states have call predecessors, (46), 46 states have call successors, (46) [2022-07-13 16:39:59,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 289 transitions. [2022-07-13 16:39:59,024 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 289 transitions. Word has length 60 [2022-07-13 16:39:59,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:39:59,026 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 289 transitions. [2022-07-13 16:39:59,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 16 states have internal predecessors, (40), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-13 16:39:59,026 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 289 transitions. [2022-07-13 16:39:59,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-13 16:39:59,029 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:39:59,029 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:39:59,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 16:39:59,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:39:59,230 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:39:59,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:39:59,231 INFO L85 PathProgramCache]: Analyzing trace with hash -902942769, now seen corresponding path program 1 times [2022-07-13 16:39:59,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:39:59,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78235777] [2022-07-13 16:39:59,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:39:59,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:39:59,240 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:39:59,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069144794] [2022-07-13 16:39:59,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:39:59,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:39:59,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:39:59,255 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) [2022-07-13 16:39:59,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 16:39:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:39:59,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 16:39:59,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:39:59,425 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-07-13 16:39:59,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:39:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-07-13 16:39:59,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:39:59,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78235777] [2022-07-13 16:39:59,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:39:59,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069144794] [2022-07-13 16:39:59,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069144794] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:39:59,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:39:59,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-13 16:39:59,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754738643] [2022-07-13 16:39:59,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:39:59,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 16:39:59,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:39:59,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 16:39:59,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-13 16:39:59,603 INFO L87 Difference]: Start difference. First operand 246 states and 289 transitions. Second operand has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-13 16:40:00,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:40:00,285 INFO L93 Difference]: Finished difference Result 269 states and 317 transitions. [2022-07-13 16:40:00,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 16:40:00,286 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 71 [2022-07-13 16:40:00,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:40:00,287 INFO L225 Difference]: With dead ends: 269 [2022-07-13 16:40:00,287 INFO L226 Difference]: Without dead ends: 254 [2022-07-13 16:40:00,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-07-13 16:40:00,288 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 20 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 16:40:00,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 132 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 16:40:00,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-07-13 16:40:00,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 251. [2022-07-13 16:40:00,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 171 states have (on average 1.152046783625731) internal successors, (197), 179 states have internal predecessors, (197), 51 states have call successors, (51), 28 states have call predecessors, (51), 28 states have return successors, (48), 43 states have call predecessors, (48), 48 states have call successors, (48) [2022-07-13 16:40:00,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 296 transitions. [2022-07-13 16:40:00,307 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 296 transitions. Word has length 71 [2022-07-13 16:40:00,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:40:00,308 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 296 transitions. [2022-07-13 16:40:00,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-13 16:40:00,308 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 296 transitions. [2022-07-13 16:40:00,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-13 16:40:00,309 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:40:00,309 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:40:00,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 16:40:00,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:40:00,519 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:40:00,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:40:00,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1932765757, now seen corresponding path program 2 times [2022-07-13 16:40:00,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:40:00,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325598651] [2022-07-13 16:40:00,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:40:00,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:40:00,539 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:40:00,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525105575] [2022-07-13 16:40:00,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 16:40:00,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:40:00,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:40:00,545 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) [2022-07-13 16:40:00,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 16:40:00,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 16:40:00,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:40:00,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 16:40:00,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:40:00,642 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-13 16:40:00,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:40:00,715 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-13 16:40:00,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:40:00,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325598651] [2022-07-13 16:40:00,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:40:00,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525105575] [2022-07-13 16:40:00,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525105575] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:40:00,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:40:00,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-07-13 16:40:00,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337078768] [2022-07-13 16:40:00,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:40:00,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:40:00,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:40:00,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:40:00,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:40:00,718 INFO L87 Difference]: Start difference. First operand 251 states and 296 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-07-13 16:40:00,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:40:00,773 INFO L93 Difference]: Finished difference Result 282 states and 333 transitions. [2022-07-13 16:40:00,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 16:40:00,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 74 [2022-07-13 16:40:00,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:40:00,775 INFO L225 Difference]: With dead ends: 282 [2022-07-13 16:40:00,775 INFO L226 Difference]: Without dead ends: 218 [2022-07-13 16:40:00,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:40:00,776 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:40:00,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 141 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:40:00,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-07-13 16:40:00,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2022-07-13 16:40:00,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 149 states have (on average 1.1476510067114094) internal successors, (171), 155 states have internal predecessors, (171), 43 states have call successors, (43), 25 states have call predecessors, (43), 25 states have return successors, (41), 37 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-13 16:40:00,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 255 transitions. [2022-07-13 16:40:00,801 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 255 transitions. Word has length 74 [2022-07-13 16:40:00,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:40:00,801 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 255 transitions. [2022-07-13 16:40:00,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-07-13 16:40:00,801 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 255 transitions. [2022-07-13 16:40:00,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-13 16:40:00,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:40:00,803 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:40:00,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 16:40:01,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-13 16:40:01,026 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:40:01,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:40:01,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1315137972, now seen corresponding path program 3 times [2022-07-13 16:40:01,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:40:01,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126859255] [2022-07-13 16:40:01,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:40:01,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:40:01,035 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:40:01,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615100463] [2022-07-13 16:40:01,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 16:40:01,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:40:01,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:40:01,039 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) [2022-07-13 16:40:01,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 16:40:01,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 16:40:01,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:40:01,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-13 16:40:01,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:40:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-13 16:40:01,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:40:42,926 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-13 16:40:42,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:40:42,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126859255] [2022-07-13 16:40:42,927 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:40:42,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615100463] [2022-07-13 16:40:42,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615100463] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:40:42,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:40:42,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2022-07-13 16:40:42,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688016687] [2022-07-13 16:40:42,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:40:42,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 16:40:42,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:40:42,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 16:40:42,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-07-13 16:40:42,929 INFO L87 Difference]: Start difference. First operand 218 states and 255 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 10 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26)