./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/ps4-ll_unwindbound20.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 99e5cccea54789cc7c8b01ece41ae38ca7afc8c38f73e2884988b8ff4c6bfc25 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 04:08:38,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 04:08:38,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 04:08:38,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 04:08:38,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 04:08:38,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 04:08:38,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 04:08:38,644 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 04:08:38,645 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 04:08:38,649 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 04:08:38,650 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 04:08:38,652 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 04:08:38,653 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 04:08:38,654 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 04:08:38,655 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 04:08:38,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 04:08:38,661 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 04:08:38,662 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 04:08:38,663 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 04:08:38,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 04:08:38,669 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 04:08:38,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 04:08:38,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 04:08:38,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 04:08:38,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 04:08:38,680 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 04:08:38,681 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 04:08:38,681 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 04:08:38,682 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 04:08:38,682 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 04:08:38,683 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 04:08:38,683 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 04:08:38,684 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 04:08:38,685 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 04:08:38,686 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 04:08:38,687 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 04:08:38,687 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 04:08:38,688 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 04:08:38,688 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 04:08:38,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 04:08:38,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 04:08:38,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 04:08:38,695 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 04:08:38,725 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 04:08:38,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 04:08:38,726 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 04:08:38,726 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 04:08:38,727 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 04:08:38,727 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 04:08:38,728 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 04:08:38,728 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 04:08:38,728 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 04:08:38,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 04:08:38,730 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 04:08:38,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 04:08:38,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 04:08:38,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 04:08:38,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 04:08:38,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 04:08:38,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 04:08:38,731 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 04:08:38,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 04:08:38,732 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 04:08:38,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 04:08:38,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 04:08:38,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 04:08:38,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 04:08:38,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 04:08:38,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 04:08:38,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 04:08:38,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 04:08:38,734 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 04:08:38,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 04:08:38,734 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 04:08:38,734 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 04:08:38,735 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 04:08:38,735 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99e5cccea54789cc7c8b01ece41ae38ca7afc8c38f73e2884988b8ff4c6bfc25 [2022-07-21 04:08:39,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 04:08:39,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 04:08:39,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 04:08:39,056 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 04:08:39,057 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 04:08:39,058 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c [2022-07-21 04:08:39,114 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e5c3e31b/32ab8aa01d574cd585f6a11b765f6460/FLAGd9618ead3 [2022-07-21 04:08:39,507 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 04:08:39,507 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c [2022-07-21 04:08:39,512 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e5c3e31b/32ab8aa01d574cd585f6a11b765f6460/FLAGd9618ead3 [2022-07-21 04:08:39,527 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e5c3e31b/32ab8aa01d574cd585f6a11b765f6460 [2022-07-21 04:08:39,529 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 04:08:39,530 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 04:08:39,533 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 04:08:39,533 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 04:08:39,536 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 04:08:39,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:08:39" (1/1) ... [2022-07-21 04:08:39,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d9fd3e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:08:39, skipping insertion in model container [2022-07-21 04:08:39,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:08:39" (1/1) ... [2022-07-21 04:08:39,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 04:08:39,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 04:08:39,693 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/ps4-ll_unwindbound20.c[458,471] [2022-07-21 04:08:39,712 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 04:08:39,729 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 04:08:39,761 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/ps4-ll_unwindbound20.c[458,471] [2022-07-21 04:08:39,767 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 04:08:39,801 INFO L208 MainTranslator]: Completed translation [2022-07-21 04:08:39,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:08:39 WrapperNode [2022-07-21 04:08:39,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 04:08:39,803 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 04:08:39,803 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 04:08:39,803 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 04:08:39,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:08:39" (1/1) ... [2022-07-21 04:08:39,814 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:08:39" (1/1) ... [2022-07-21 04:08:39,831 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 39 [2022-07-21 04:08:39,831 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 04:08:39,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 04:08:39,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 04:08:39,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 04:08:39,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:08:39" (1/1) ... [2022-07-21 04:08:39,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:08:39" (1/1) ... [2022-07-21 04:08:39,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:08:39" (1/1) ... [2022-07-21 04:08:39,847 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:08:39" (1/1) ... [2022-07-21 04:08:39,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:08:39" (1/1) ... [2022-07-21 04:08:39,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:08:39" (1/1) ... [2022-07-21 04:08:39,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:08:39" (1/1) ... [2022-07-21 04:08:39,864 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 04:08:39,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 04:08:39,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 04:08:39,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 04:08:39,866 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:08:39" (1/1) ... [2022-07-21 04:08:39,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 04:08:39,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:08:39,901 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) [2022-07-21 04:08:39,926 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 [2022-07-21 04:08:39,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 04:08:39,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 04:08:39,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 04:08:39,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 04:08:39,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 04:08:39,943 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 04:08:40,003 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 04:08:40,005 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 04:08:40,106 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 04:08:40,110 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 04:08:40,110 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 04:08:40,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:08:40 BoogieIcfgContainer [2022-07-21 04:08:40,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 04:08:40,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 04:08:40,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 04:08:40,135 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 04:08:40,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:08:39" (1/3) ... [2022-07-21 04:08:40,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac30c56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:08:40, skipping insertion in model container [2022-07-21 04:08:40,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:08:39" (2/3) ... [2022-07-21 04:08:40,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac30c56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:08:40, skipping insertion in model container [2022-07-21 04:08:40,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:08:40" (3/3) ... [2022-07-21 04:08:40,140 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound20.c [2022-07-21 04:08:40,151 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 04:08:40,167 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 04:08:40,228 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 04:08:40,233 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@16dea8ed, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4512bd3c [2022-07-21 04:08:40,234 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 04:08:40,241 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 04:08:40,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 04:08:40,252 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:08:40,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:08:40,253 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:08:40,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:08:40,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1819788390, now seen corresponding path program 1 times [2022-07-21 04:08:40,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:08:40,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497205885] [2022-07-21 04:08:40,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:08:40,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:08:40,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 04:08:40,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 04:08:40,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:08:40,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497205885] [2022-07-21 04:08:40,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497205885] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 04:08:40,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 04:08:40,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 04:08:40,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174750872] [2022-07-21 04:08:40,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 04:08:40,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 04:08:40,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:08:40,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 04:08:40,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 04:08:40,441 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-07-21 04:08:40,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:08:40,458 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2022-07-21 04:08:40,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 04:08:40,460 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 7 [2022-07-21 04:08:40,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:08:40,470 INFO L225 Difference]: With dead ends: 34 [2022-07-21 04:08:40,471 INFO L226 Difference]: Without dead ends: 14 [2022-07-21 04:08:40,477 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 [2022-07-21 04:08:40,480 INFO L413 NwaCegarLoop]: 21 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, 21 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 [2022-07-21 04:08:40,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 04:08:40,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-07-21 04:08:40,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-07-21 04:08:40,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 04:08:40,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-07-21 04:08:40,511 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 7 [2022-07-21 04:08:40,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:08:40,512 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-07-21 04:08:40,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-07-21 04:08:40,513 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-07-21 04:08:40,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 04:08:40,514 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:08:40,514 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:08:40,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 04:08:40,515 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:08:40,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:08:40,516 INFO L85 PathProgramCache]: Analyzing trace with hash 178441499, now seen corresponding path program 1 times [2022-07-21 04:08:40,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:08:40,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944569288] [2022-07-21 04:08:40,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:08:40,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:08:40,547 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:08:40,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924366313] [2022-07-21 04:08:40,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:08:40,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:40,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:08:40,555 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) [2022-07-21 04:08:40,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 04:08:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 04:08:40,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 04:08:40,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:08:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 04:08:40,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 04:08:40,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:08:40,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944569288] [2022-07-21 04:08:40,698 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:08:40,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924366313] [2022-07-21 04:08:40,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924366313] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 04:08:40,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 04:08:40,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 04:08:40,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982476820] [2022-07-21 04:08:40,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 04:08:40,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 04:08:40,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:08:40,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 04:08:40,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 04:08:40,706 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-07-21 04:08:40,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:08:40,726 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2022-07-21 04:08:40,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 04:08:40,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 8 [2022-07-21 04:08:40,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:08:40,727 INFO L225 Difference]: With dead ends: 24 [2022-07-21 04:08:40,728 INFO L226 Difference]: Without dead ends: 16 [2022-07-21 04:08:40,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 04:08:40,732 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 04:08:40,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 04:08:40,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-07-21 04:08:40,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-07-21 04:08:40,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 04:08:40,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-07-21 04:08:40,741 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2022-07-21 04:08:40,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:08:40,742 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-07-21 04:08:40,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-07-21 04:08:40,747 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-07-21 04:08:40,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 04:08:40,748 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:08:40,748 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:08:40,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 04:08:40,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:40,968 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:08:40,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:08:40,968 INFO L85 PathProgramCache]: Analyzing trace with hash 180228959, now seen corresponding path program 1 times [2022-07-21 04:08:40,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:08:40,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070029091] [2022-07-21 04:08:40,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:08:40,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:08:40,977 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:08:40,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [616677115] [2022-07-21 04:08:40,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:08:40,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:40,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:08:40,982 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) [2022-07-21 04:08:40,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 04:08:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 04:08:41,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 04:08:41,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:08:41,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 04:08:41,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 04:08:41,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:08:41,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070029091] [2022-07-21 04:08:41,096 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:08:41,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616677115] [2022-07-21 04:08:41,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616677115] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 04:08:41,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 04:08:41,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 04:08:41,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976673071] [2022-07-21 04:08:41,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 04:08:41,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 04:08:41,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:08:41,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 04:08:41,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 04:08:41,101 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-07-21 04:08:41,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:08:41,160 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-07-21 04:08:41,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 04:08:41,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 8 [2022-07-21 04:08:41,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:08:41,162 INFO L225 Difference]: With dead ends: 26 [2022-07-21 04:08:41,162 INFO L226 Difference]: Without dead ends: 22 [2022-07-21 04:08:41,162 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 [2022-07-21 04:08:41,163 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 04:08:41,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 48 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 04:08:41,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-21 04:08:41,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-21 04:08:41,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 04:08:41,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-07-21 04:08:41,176 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 8 [2022-07-21 04:08:41,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:08:41,176 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-07-21 04:08:41,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-07-21 04:08:41,176 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-07-21 04:08:41,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 04:08:41,177 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:08:41,177 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:08:41,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 04:08:41,377 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,SelfDestructingSolverStorable2 [2022-07-21 04:08:41,378 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:08:41,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:08:41,378 INFO L85 PathProgramCache]: Analyzing trace with hash 823572993, now seen corresponding path program 1 times [2022-07-21 04:08:41,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:08:41,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342705867] [2022-07-21 04:08:41,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:08:41,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:08:41,387 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:08:41,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85961921] [2022-07-21 04:08:41,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:08:41,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:41,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:08:41,388 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) [2022-07-21 04:08:41,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 04:08:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 04:08:41,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 04:08:41,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:08:41,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 04:08:41,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:08:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 04:08:41,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:08:41,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342705867] [2022-07-21 04:08:41,506 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:08:41,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85961921] [2022-07-21 04:08:41,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85961921] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 04:08:41,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 04:08:41,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-07-21 04:08:41,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887461159] [2022-07-21 04:08:41,507 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 04:08:41,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 04:08:41,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:08:41,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 04:08:41,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-21 04:08:41,508 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 04:08:41,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:08:41,583 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2022-07-21 04:08:41,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 04:08:41,583 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-07-21 04:08:41,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:08:41,584 INFO L225 Difference]: With dead ends: 56 [2022-07-21 04:08:41,584 INFO L226 Difference]: Without dead ends: 48 [2022-07-21 04:08:41,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-21 04:08:41,586 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 04:08:41,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 93 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 04:08:41,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-21 04:08:41,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2022-07-21 04:08:41,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 32 states have internal predecessors, (36), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-21 04:08:41,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2022-07-21 04:08:41,594 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 16 [2022-07-21 04:08:41,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:08:41,594 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2022-07-21 04:08:41,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 04:08:41,595 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2022-07-21 04:08:41,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 04:08:41,595 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:08:41,595 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:08:41,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 04:08:41,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:41,812 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:08:41,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:08:41,812 INFO L85 PathProgramCache]: Analyzing trace with hash 825360453, now seen corresponding path program 1 times [2022-07-21 04:08:41,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:08:41,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483621855] [2022-07-21 04:08:41,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:08:41,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:08:41,820 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:08:41,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1666918353] [2022-07-21 04:08:41,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:08:41,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:41,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:08:41,822 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) [2022-07-21 04:08:41,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 04:08:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 04:08:41,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 04:08:41,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:08:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 04:08:41,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:08:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 04:08:42,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:08:42,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483621855] [2022-07-21 04:08:42,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:08:42,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666918353] [2022-07-21 04:08:42,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666918353] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 04:08:42,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:08:42,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-07-21 04:08:42,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073107036] [2022-07-21 04:08:42,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 04:08:42,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 04:08:42,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:08:42,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 04:08:42,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 04:08:42,174 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-07-21 04:08:42,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:08:42,216 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2022-07-21 04:08:42,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 04:08:42,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 16 [2022-07-21 04:08:42,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:08:42,217 INFO L225 Difference]: With dead ends: 58 [2022-07-21 04:08:42,219 INFO L226 Difference]: Without dead ends: 47 [2022-07-21 04:08:42,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-21 04:08:42,221 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 04:08:42,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 37 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 04:08:42,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-21 04:08:42,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2022-07-21 04:08:42,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 04:08:42,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-07-21 04:08:42,236 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 16 [2022-07-21 04:08:42,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:08:42,237 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-07-21 04:08:42,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-07-21 04:08:42,239 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-07-21 04:08:42,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 04:08:42,240 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:08:42,240 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:08:42,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 04:08:42,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:42,463 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:08:42,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:08:42,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1696898494, now seen corresponding path program 1 times [2022-07-21 04:08:42,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:08:42,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598283566] [2022-07-21 04:08:42,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:08:42,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:08:42,472 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:08:42,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080062184] [2022-07-21 04:08:42,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:08:42,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:42,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:08:42,474 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) [2022-07-21 04:08:42,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 04:08:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 04:08:42,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 04:08:42,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:08:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 04:08:42,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:08:42,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:08:42,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598283566] [2022-07-21 04:08:42,781 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:08:42,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080062184] [2022-07-21 04:08:42,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080062184] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:08:42,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:08:42,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-07-21 04:08:42,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71737710] [2022-07-21 04:08:42,782 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:08:42,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 04:08:42,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:08:42,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 04:08:42,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-21 04:08:42,783 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 04:08:42,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:08:42,850 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2022-07-21 04:08:42,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 04:08:42,850 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-07-21 04:08:42,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:08:42,853 INFO L225 Difference]: With dead ends: 46 [2022-07-21 04:08:42,853 INFO L226 Difference]: Without dead ends: 41 [2022-07-21 04:08:42,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-21 04:08:42,856 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 04:08:42,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 76 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 04:08:42,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-21 04:08:42,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-07-21 04:08:42,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 04:08:42,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-07-21 04:08:42,873 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 22 [2022-07-21 04:08:42,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:08:42,873 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-07-21 04:08:42,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 04:08:42,873 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-07-21 04:08:42,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 04:08:42,880 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:08:42,880 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-07-21 04:08:42,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 04:08:43,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:43,104 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:08:43,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:08:43,105 INFO L85 PathProgramCache]: Analyzing trace with hash -47987544, now seen corresponding path program 2 times [2022-07-21 04:08:43,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:08:43,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276093104] [2022-07-21 04:08:43,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:08:43,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:08:43,114 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:08:43,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1257962562] [2022-07-21 04:08:43,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 04:08:43,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:43,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:08:43,115 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) [2022-07-21 04:08:43,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 04:08:43,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 04:08:43,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:08:43,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 04:08:43,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:08:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 04:08:43,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:08:43,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:08:43,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276093104] [2022-07-21 04:08:43,501 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:08:43,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257962562] [2022-07-21 04:08:43,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257962562] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:08:43,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:08:43,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-07-21 04:08:43,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041304489] [2022-07-21 04:08:43,502 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:08:43,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 04:08:43,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:08:43,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 04:08:43,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-07-21 04:08:43,504 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 04:08:43,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:08:43,581 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-07-21 04:08:43,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 04:08:43,582 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2022-07-21 04:08:43,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:08:43,583 INFO L225 Difference]: With dead ends: 46 [2022-07-21 04:08:43,583 INFO L226 Difference]: Without dead ends: 41 [2022-07-21 04:08:43,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-21 04:08:43,586 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 04:08:43,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 104 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 04:08:43,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-21 04:08:43,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-07-21 04:08:43,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 04:08:43,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-07-21 04:08:43,600 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 30 [2022-07-21 04:08:43,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:08:43,600 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-07-21 04:08:43,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 04:08:43,600 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-07-21 04:08:43,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-21 04:08:43,601 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:08:43,601 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2022-07-21 04:08:43,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 04:08:43,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:43,828 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:08:43,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:08:43,828 INFO L85 PathProgramCache]: Analyzing trace with hash -584163058, now seen corresponding path program 3 times [2022-07-21 04:08:43,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:08:43,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261276620] [2022-07-21 04:08:43,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:08:43,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:08:43,836 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:08:43,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525195797] [2022-07-21 04:08:43,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 04:08:43,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:43,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:08:43,838 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) [2022-07-21 04:08:43,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 04:08:43,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 04:08:43,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:08:43,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 04:08:43,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:08:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 04:08:44,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:08:44,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:08:44,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261276620] [2022-07-21 04:08:44,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:08:44,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525195797] [2022-07-21 04:08:44,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525195797] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:08:44,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:08:44,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-07-21 04:08:44,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479227775] [2022-07-21 04:08:44,143 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:08:44,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 04:08:44,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:08:44,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 04:08:44,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-21 04:08:44,145 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 04:08:44,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:08:44,242 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2022-07-21 04:08:44,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 04:08:44,243 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2022-07-21 04:08:44,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:08:44,243 INFO L225 Difference]: With dead ends: 48 [2022-07-21 04:08:44,243 INFO L226 Difference]: Without dead ends: 43 [2022-07-21 04:08:44,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-07-21 04:08:44,244 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 04:08:44,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 136 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 04:08:44,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-21 04:08:44,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-07-21 04:08:44,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 04:08:44,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2022-07-21 04:08:44,250 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2022-07-21 04:08:44,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:08:44,250 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2022-07-21 04:08:44,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 04:08:44,251 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2022-07-21 04:08:44,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-21 04:08:44,252 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:08:44,252 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-21 04:08:44,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 04:08:44,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:44,453 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:08:44,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:08:44,453 INFO L85 PathProgramCache]: Analyzing trace with hash 2045303987, now seen corresponding path program 2 times [2022-07-21 04:08:44,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:08:44,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390501181] [2022-07-21 04:08:44,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:08:44,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:08:44,461 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:08:44,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597543011] [2022-07-21 04:08:44,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 04:08:44,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:44,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:08:44,480 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) [2022-07-21 04:08:44,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 04:08:44,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 04:08:44,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:08:44,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 04:08:44,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:08:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 04:08:44,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:08:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 04:08:44,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:08:44,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390501181] [2022-07-21 04:08:44,682 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:08:44,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597543011] [2022-07-21 04:08:44,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597543011] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 04:08:44,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 04:08:44,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-07-21 04:08:44,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813521607] [2022-07-21 04:08:44,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 04:08:44,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 04:08:44,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:08:44,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 04:08:44,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-21 04:08:44,684 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 04:08:44,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:08:44,871 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2022-07-21 04:08:44,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 04:08:44,871 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 40 [2022-07-21 04:08:44,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:08:44,872 INFO L225 Difference]: With dead ends: 119 [2022-07-21 04:08:44,873 INFO L226 Difference]: Without dead ends: 114 [2022-07-21 04:08:44,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-07-21 04:08:44,874 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 107 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 04:08:44,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 119 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 04:08:44,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-21 04:08:44,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 89. [2022-07-21 04:08:44,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 67 states have internal predecessors, (74), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 04:08:44,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2022-07-21 04:08:44,884 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 40 [2022-07-21 04:08:44,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:08:44,884 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2022-07-21 04:08:44,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 04:08:44,885 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2022-07-21 04:08:44,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 04:08:44,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:08:44,886 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2022-07-21 04:08:44,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 04:08:45,107 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,SelfDestructingSolverStorable8 [2022-07-21 04:08:45,108 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:08:45,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:08:45,108 INFO L85 PathProgramCache]: Analyzing trace with hash -635357324, now seen corresponding path program 4 times [2022-07-21 04:08:45,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:08:45,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237809176] [2022-07-21 04:08:45,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:08:45,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:08:45,116 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:08:45,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865259503] [2022-07-21 04:08:45,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 04:08:45,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:45,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:08:45,118 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) [2022-07-21 04:08:45,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 04:08:45,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 04:08:45,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:08:45,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 04:08:45,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:08:45,409 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-21 04:08:45,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:08:45,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:08:45,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237809176] [2022-07-21 04:08:45,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:08:45,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865259503] [2022-07-21 04:08:45,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865259503] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:08:45,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:08:45,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-07-21 04:08:45,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044279539] [2022-07-21 04:08:45,604 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:08:45,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 04:08:45,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:08:45,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 04:08:45,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-07-21 04:08:45,606 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 04:08:45,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:08:45,728 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2022-07-21 04:08:45,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 04:08:45,728 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 46 [2022-07-21 04:08:45,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:08:45,729 INFO L225 Difference]: With dead ends: 94 [2022-07-21 04:08:45,730 INFO L226 Difference]: Without dead ends: 89 [2022-07-21 04:08:45,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-07-21 04:08:45,730 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 04:08:45,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 172 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 04:08:45,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-21 04:08:45,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-07-21 04:08:45,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 67 states have internal predecessors, (73), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 04:08:45,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2022-07-21 04:08:45,741 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 46 [2022-07-21 04:08:45,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:08:45,741 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2022-07-21 04:08:45,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 04:08:45,742 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2022-07-21 04:08:45,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 04:08:45,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:08:45,743 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2022-07-21 04:08:45,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 04:08:45,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 04:08:45,949 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:08:45,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:08:45,949 INFO L85 PathProgramCache]: Analyzing trace with hash 220350426, now seen corresponding path program 5 times [2022-07-21 04:08:45,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:08:45,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653313364] [2022-07-21 04:08:45,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:08:45,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:08:45,958 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:08:45,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772547902] [2022-07-21 04:08:45,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 04:08:45,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:45,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:08:45,960 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:08:45,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 04:08:46,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-21 04:08:46,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:08:46,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-21 04:08:46,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:08:46,324 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 04:08:46,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:08:46,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:08:46,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653313364] [2022-07-21 04:08:46,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:08:46,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772547902] [2022-07-21 04:08:46,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772547902] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:08:46,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:08:46,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-07-21 04:08:46,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908775305] [2022-07-21 04:08:46,482 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:08:46,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 04:08:46,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:08:46,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 04:08:46,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-21 04:08:46,483 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 04:08:46,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:08:46,629 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2022-07-21 04:08:46,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 04:08:46,629 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 54 [2022-07-21 04:08:46,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:08:46,630 INFO L225 Difference]: With dead ends: 94 [2022-07-21 04:08:46,630 INFO L226 Difference]: Without dead ends: 89 [2022-07-21 04:08:46,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-07-21 04:08:46,631 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 04:08:46,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 212 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 04:08:46,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-21 04:08:46,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-07-21 04:08:46,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 04:08:46,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2022-07-21 04:08:46,640 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 54 [2022-07-21 04:08:46,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:08:46,640 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2022-07-21 04:08:46,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 04:08:46,641 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2022-07-21 04:08:46,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-21 04:08:46,641 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:08:46,642 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2022-07-21 04:08:46,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 04:08:46,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-21 04:08:46,848 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:08:46,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:08:46,849 INFO L85 PathProgramCache]: Analyzing trace with hash 156734016, now seen corresponding path program 6 times [2022-07-21 04:08:46,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:08:46,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214079379] [2022-07-21 04:08:46,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:08:46,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:08:46,856 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:08:46,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252447203] [2022-07-21 04:08:46,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 04:08:46,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:46,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:08:46,858 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:08:46,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 04:08:46,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-21 04:08:46,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:08:46,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 04:08:47,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:08:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 14 proven. 84 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-21 04:08:47,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:08:47,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:08:47,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214079379] [2022-07-21 04:08:47,301 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:08:47,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252447203] [2022-07-21 04:08:47,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252447203] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:08:47,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:08:47,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-07-21 04:08:47,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313907424] [2022-07-21 04:08:47,302 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:08:47,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 04:08:47,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:08:47,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 04:08:47,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-07-21 04:08:47,303 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-21 04:08:47,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:08:47,486 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2022-07-21 04:08:47,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 04:08:47,486 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 62 [2022-07-21 04:08:47,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:08:47,487 INFO L225 Difference]: With dead ends: 94 [2022-07-21 04:08:47,487 INFO L226 Difference]: Without dead ends: 89 [2022-07-21 04:08:47,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-07-21 04:08:47,488 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 04:08:47,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 256 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 04:08:47,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-21 04:08:47,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-07-21 04:08:47,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 04:08:47,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2022-07-21 04:08:47,495 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 62 [2022-07-21 04:08:47,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:08:47,495 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2022-07-21 04:08:47,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-21 04:08:47,495 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2022-07-21 04:08:47,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-21 04:08:47,496 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:08:47,496 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1] [2022-07-21 04:08:47,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 04:08:47,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-21 04:08:47,702 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:08:47,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:08:47,702 INFO L85 PathProgramCache]: Analyzing trace with hash -605612378, now seen corresponding path program 7 times [2022-07-21 04:08:47,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:08:47,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71349243] [2022-07-21 04:08:47,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:08:47,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:08:47,710 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:08:47,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75637843] [2022-07-21 04:08:47,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 04:08:47,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:47,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:08:47,712 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:08:47,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 04:08:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 04:08:48,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-21 04:08:48,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:08:48,377 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 16 proven. 112 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-21 04:08:48,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:08:48,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:08:48,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71349243] [2022-07-21 04:08:48,522 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:08:48,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75637843] [2022-07-21 04:08:48,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75637843] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:08:48,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:08:48,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-07-21 04:08:48,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181907116] [2022-07-21 04:08:48,523 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:08:48,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 04:08:48,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:08:48,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 04:08:48,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-07-21 04:08:48,524 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 04:08:48,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:08:48,732 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2022-07-21 04:08:48,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 04:08:48,732 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 70 [2022-07-21 04:08:48,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:08:48,733 INFO L225 Difference]: With dead ends: 94 [2022-07-21 04:08:48,733 INFO L226 Difference]: Without dead ends: 89 [2022-07-21 04:08:48,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-07-21 04:08:48,734 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 04:08:48,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 304 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 04:08:48,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-21 04:08:48,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-07-21 04:08:48,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 04:08:48,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2022-07-21 04:08:48,742 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 70 [2022-07-21 04:08:48,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:08:48,742 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2022-07-21 04:08:48,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 04:08:48,742 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2022-07-21 04:08:48,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-21 04:08:48,743 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:08:48,743 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1] [2022-07-21 04:08:48,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 04:08:48,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 04:08:48,944 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:08:48,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:08:48,944 INFO L85 PathProgramCache]: Analyzing trace with hash 200725772, now seen corresponding path program 8 times [2022-07-21 04:08:48,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:08:48,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500769187] [2022-07-21 04:08:48,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:08:48,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:08:48,955 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:08:48,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996984689] [2022-07-21 04:08:48,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 04:08:48,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:48,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:08:48,958 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:08:48,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 04:08:49,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 04:08:49,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:08:49,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 04:08:49,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:08:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 18 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-21 04:08:49,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:08:49,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:08:49,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500769187] [2022-07-21 04:08:49,777 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:08:49,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996984689] [2022-07-21 04:08:49,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996984689] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:08:49,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:08:49,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-07-21 04:08:49,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181791457] [2022-07-21 04:08:49,778 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:08:49,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 04:08:49,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:08:49,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 04:08:49,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-07-21 04:08:49,779 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-21 04:08:50,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:08:50,023 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2022-07-21 04:08:50,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 04:08:50,023 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 78 [2022-07-21 04:08:50,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:08:50,024 INFO L225 Difference]: With dead ends: 94 [2022-07-21 04:08:50,024 INFO L226 Difference]: Without dead ends: 89 [2022-07-21 04:08:50,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-07-21 04:08:50,025 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 04:08:50,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 356 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 04:08:50,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-21 04:08:50,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-07-21 04:08:50,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 04:08:50,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-07-21 04:08:50,032 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 78 [2022-07-21 04:08:50,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:08:50,032 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-07-21 04:08:50,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-21 04:08:50,033 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-07-21 04:08:50,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-21 04:08:50,033 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:08:50,033 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1] [2022-07-21 04:08:50,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 04:08:50,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-21 04:08:50,240 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:08:50,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:08:50,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1699951246, now seen corresponding path program 9 times [2022-07-21 04:08:50,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:08:50,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345022882] [2022-07-21 04:08:50,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:08:50,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:08:50,252 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:08:50,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285449278] [2022-07-21 04:08:50,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 04:08:50,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:50,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:08:50,254 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:08:50,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 04:08:50,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-21 04:08:50,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:08:50,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-21 04:08:50,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:08:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-21 04:08:50,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:08:50,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:08:50,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345022882] [2022-07-21 04:08:50,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:08:50,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285449278] [2022-07-21 04:08:50,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285449278] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:08:50,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:08:50,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-07-21 04:08:50,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258450145] [2022-07-21 04:08:50,943 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:08:50,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 04:08:50,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:08:50,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 04:08:50,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-07-21 04:08:50,944 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 04:08:51,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:08:51,225 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2022-07-21 04:08:51,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 04:08:51,226 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 86 [2022-07-21 04:08:51,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:08:51,227 INFO L225 Difference]: With dead ends: 96 [2022-07-21 04:08:51,227 INFO L226 Difference]: Without dead ends: 91 [2022-07-21 04:08:51,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-07-21 04:08:51,228 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 2 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 04:08:51,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 412 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 04:08:51,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-21 04:08:51,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-07-21 04:08:51,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-21 04:08:51,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2022-07-21 04:08:51,236 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2022-07-21 04:08:51,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:08:51,236 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2022-07-21 04:08:51,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 04:08:51,236 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2022-07-21 04:08:51,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-21 04:08:51,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:08:51,237 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-07-21 04:08:51,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 04:08:51,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:51,444 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:08:51,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:08:51,445 INFO L85 PathProgramCache]: Analyzing trace with hash -780287977, now seen corresponding path program 3 times [2022-07-21 04:08:51,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:08:51,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241699092] [2022-07-21 04:08:51,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:08:51,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:08:51,453 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:08:51,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [209814672] [2022-07-21 04:08:51,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 04:08:51,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:51,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:08:51,455 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:08:51,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 04:08:52,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-21 04:08:52,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:08:52,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 04:08:52,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:08:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 04:08:52,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:08:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-21 04:08:52,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:08:52,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241699092] [2022-07-21 04:08:52,425 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:08:52,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209814672] [2022-07-21 04:08:52,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209814672] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 04:08:52,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 04:08:52,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2022-07-21 04:08:52,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079681203] [2022-07-21 04:08:52,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 04:08:52,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 04:08:52,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:08:52,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 04:08:52,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-07-21 04:08:52,428 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 24 states, 24 states have (on average 4.208333333333333) internal successors, (101), 24 states have internal predecessors, (101), 20 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-07-21 04:08:52,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:08:52,805 INFO L93 Difference]: Finished difference Result 219 states and 229 transitions. [2022-07-21 04:08:52,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-21 04:08:52,806 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.208333333333333) internal successors, (101), 24 states have internal predecessors, (101), 20 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 88 [2022-07-21 04:08:52,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:08:52,807 INFO L225 Difference]: With dead ends: 219 [2022-07-21 04:08:52,807 INFO L226 Difference]: Without dead ends: 214 [2022-07-21 04:08:52,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=665, Invalid=1141, Unknown=0, NotChecked=0, Total=1806 [2022-07-21 04:08:52,808 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 157 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 04:08:52,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 196 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 04:08:52,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-07-21 04:08:52,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 169. [2022-07-21 04:08:52,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 127 states have (on average 1.0866141732283465) internal successors, (138), 127 states have internal predecessors, (138), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-21 04:08:52,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 179 transitions. [2022-07-21 04:08:52,824 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 179 transitions. Word has length 88 [2022-07-21 04:08:52,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:08:52,825 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 179 transitions. [2022-07-21 04:08:52,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.208333333333333) internal successors, (101), 24 states have internal predecessors, (101), 20 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-07-21 04:08:52,825 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 179 transitions. [2022-07-21 04:08:52,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-21 04:08:52,827 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:08:52,827 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1] [2022-07-21 04:08:52,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 04:08:53,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-21 04:08:53,034 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:08:53,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:08:53,035 INFO L85 PathProgramCache]: Analyzing trace with hash 53411800, now seen corresponding path program 10 times [2022-07-21 04:08:53,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:08:53,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184996320] [2022-07-21 04:08:53,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:08:53,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:08:53,054 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:08:53,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46161970] [2022-07-21 04:08:53,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 04:08:53,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:53,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:08:53,058 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:08:53,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 04:08:53,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 04:08:53,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:08:53,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-21 04:08:53,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:08:54,163 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 22 proven. 220 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-07-21 04:08:54,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:08:54,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:08:54,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184996320] [2022-07-21 04:08:54,366 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:08:54,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46161970] [2022-07-21 04:08:54,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46161970] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:08:54,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:08:54,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-07-21 04:08:54,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649283270] [2022-07-21 04:08:54,367 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:08:54,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 04:08:54,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:08:54,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 04:08:54,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-07-21 04:08:54,368 INFO L87 Difference]: Start difference. First operand 169 states and 179 transitions. Second operand has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-21 04:08:54,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:08:54,693 INFO L93 Difference]: Finished difference Result 174 states and 183 transitions. [2022-07-21 04:08:54,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 04:08:54,694 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 94 [2022-07-21 04:08:54,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:08:54,695 INFO L225 Difference]: With dead ends: 174 [2022-07-21 04:08:54,695 INFO L226 Difference]: Without dead ends: 169 [2022-07-21 04:08:54,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-07-21 04:08:54,696 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 2 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 04:08:54,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 472 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 04:08:54,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-21 04:08:54,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-07-21 04:08:54,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 127 states have (on average 1.078740157480315) internal successors, (137), 127 states have internal predecessors, (137), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-21 04:08:54,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 178 transitions. [2022-07-21 04:08:54,709 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 178 transitions. Word has length 94 [2022-07-21 04:08:54,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:08:54,710 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 178 transitions. [2022-07-21 04:08:54,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-21 04:08:54,710 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 178 transitions. [2022-07-21 04:08:54,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-21 04:08:54,711 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:08:54,711 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1] [2022-07-21 04:08:54,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 04:08:54,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 04:08:54,917 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:08:54,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:08:54,918 INFO L85 PathProgramCache]: Analyzing trace with hash 983788606, now seen corresponding path program 11 times [2022-07-21 04:08:54,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:08:54,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815933198] [2022-07-21 04:08:54,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:08:54,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:08:54,934 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:08:54,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983349944] [2022-07-21 04:08:54,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 04:08:54,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:54,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:08:54,935 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:08:54,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 04:08:55,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-21 04:08:55,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:08:55,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-21 04:08:55,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:08:55,642 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 24 proven. 264 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-07-21 04:08:55,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:08:55,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:08:55,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815933198] [2022-07-21 04:08:55,830 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:08:55,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983349944] [2022-07-21 04:08:55,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983349944] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:08:55,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:08:55,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-07-21 04:08:55,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439538690] [2022-07-21 04:08:55,830 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:08:55,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 04:08:55,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:08:55,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 04:08:55,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-07-21 04:08:55,831 INFO L87 Difference]: Start difference. First operand 169 states and 178 transitions. Second operand has 17 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-21 04:08:56,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:08:56,146 INFO L93 Difference]: Finished difference Result 174 states and 182 transitions. [2022-07-21 04:08:56,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 04:08:56,149 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 102 [2022-07-21 04:08:56,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:08:56,150 INFO L225 Difference]: With dead ends: 174 [2022-07-21 04:08:56,150 INFO L226 Difference]: Without dead ends: 169 [2022-07-21 04:08:56,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-07-21 04:08:56,151 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 2 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 04:08:56,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 536 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 04:08:56,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-21 04:08:56,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-07-21 04:08:56,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 127 states have (on average 1.0708661417322836) internal successors, (136), 127 states have internal predecessors, (136), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-21 04:08:56,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 177 transitions. [2022-07-21 04:08:56,161 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 177 transitions. Word has length 102 [2022-07-21 04:08:56,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:08:56,162 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 177 transitions. [2022-07-21 04:08:56,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-21 04:08:56,162 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 177 transitions. [2022-07-21 04:08:56,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-21 04:08:56,163 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:08:56,163 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1] [2022-07-21 04:08:56,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 04:08:56,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 04:08:56,370 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:08:56,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:08:56,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1339026780, now seen corresponding path program 12 times [2022-07-21 04:08:56,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:08:56,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260686124] [2022-07-21 04:08:56,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:08:56,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:08:56,383 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:08:56,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001226142] [2022-07-21 04:08:56,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 04:08:56,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:56,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:08:56,385 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:08:56,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 04:08:56,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-07-21 04:08:56,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:08:56,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-21 04:08:56,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:08:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 26 proven. 312 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-21 04:08:57,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:08:57,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:08:57,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260686124] [2022-07-21 04:08:57,289 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:08:57,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001226142] [2022-07-21 04:08:57,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001226142] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:08:57,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:08:57,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-21 04:08:57,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064270020] [2022-07-21 04:08:57,290 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:08:57,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 04:08:57,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:08:57,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 04:08:57,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-07-21 04:08:57,292 INFO L87 Difference]: Start difference. First operand 169 states and 177 transitions. Second operand has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-21 04:08:57,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:08:57,649 INFO L93 Difference]: Finished difference Result 174 states and 181 transitions. [2022-07-21 04:08:57,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 04:08:57,656 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 110 [2022-07-21 04:08:57,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:08:57,658 INFO L225 Difference]: With dead ends: 174 [2022-07-21 04:08:57,658 INFO L226 Difference]: Without dead ends: 169 [2022-07-21 04:08:57,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-07-21 04:08:57,659 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 2 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 04:08:57,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 604 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 04:08:57,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-21 04:08:57,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-07-21 04:08:57,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 127 states have (on average 1.062992125984252) internal successors, (135), 127 states have internal predecessors, (135), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-21 04:08:57,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 176 transitions. [2022-07-21 04:08:57,672 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 176 transitions. Word has length 110 [2022-07-21 04:08:57,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:08:57,672 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 176 transitions. [2022-07-21 04:08:57,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-21 04:08:57,672 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 176 transitions. [2022-07-21 04:08:57,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-21 04:08:57,673 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:08:57,673 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1] [2022-07-21 04:08:57,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 04:08:57,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:57,880 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:08:57,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:08:57,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1291514634, now seen corresponding path program 13 times [2022-07-21 04:08:57,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:08:57,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345310963] [2022-07-21 04:08:57,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:08:57,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:08:57,893 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:08:57,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128621356] [2022-07-21 04:08:57,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 04:08:57,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:57,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:08:57,895 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:08:57,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 04:08:58,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 04:08:58,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-21 04:08:58,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:08:58,730 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 28 proven. 364 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-07-21 04:08:58,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:08:58,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:08:58,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345310963] [2022-07-21 04:08:58,869 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:08:58,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128621356] [2022-07-21 04:08:58,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128621356] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:08:58,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:08:58,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-07-21 04:08:58,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830869439] [2022-07-21 04:08:58,869 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:08:58,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 04:08:58,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:08:58,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 04:08:58,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-07-21 04:08:58,870 INFO L87 Difference]: Start difference. First operand 169 states and 176 transitions. Second operand has 19 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-21 04:08:59,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:08:59,281 INFO L93 Difference]: Finished difference Result 174 states and 180 transitions. [2022-07-21 04:08:59,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 04:08:59,281 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 118 [2022-07-21 04:08:59,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:08:59,283 INFO L225 Difference]: With dead ends: 174 [2022-07-21 04:08:59,283 INFO L226 Difference]: Without dead ends: 169 [2022-07-21 04:08:59,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-07-21 04:08:59,283 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 2 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 04:08:59,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 676 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 04:08:59,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-21 04:08:59,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-07-21 04:08:59,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 127 states have (on average 1.0551181102362204) internal successors, (134), 127 states have internal predecessors, (134), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-21 04:08:59,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 175 transitions. [2022-07-21 04:08:59,300 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 175 transitions. Word has length 118 [2022-07-21 04:08:59,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:08:59,300 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 175 transitions. [2022-07-21 04:08:59,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-21 04:08:59,301 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 175 transitions. [2022-07-21 04:08:59,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-21 04:08:59,302 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:08:59,302 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1] [2022-07-21 04:08:59,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 04:08:59,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:59,507 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:08:59,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:08:59,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1948913008, now seen corresponding path program 14 times [2022-07-21 04:08:59,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:08:59,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586680671] [2022-07-21 04:08:59,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:08:59,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:08:59,514 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:08:59,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665485526] [2022-07-21 04:08:59,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 04:08:59,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:08:59,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:08:59,516 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:08:59,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 04:08:59,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 04:08:59,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:08:59,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-21 04:08:59,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:09:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 30 proven. 420 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-07-21 04:09:00,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:09:00,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:09:00,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586680671] [2022-07-21 04:09:00,456 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:09:00,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665485526] [2022-07-21 04:09:00,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665485526] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:09:00,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:09:00,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-07-21 04:09:00,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336114893] [2022-07-21 04:09:00,457 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:09:00,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 04:09:00,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:09:00,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 04:09:00,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-07-21 04:09:00,458 INFO L87 Difference]: Start difference. First operand 169 states and 175 transitions. Second operand has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-21 04:09:00,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:09:00,869 INFO L93 Difference]: Finished difference Result 174 states and 179 transitions. [2022-07-21 04:09:00,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 04:09:00,869 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 126 [2022-07-21 04:09:00,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:09:00,870 INFO L225 Difference]: With dead ends: 174 [2022-07-21 04:09:00,870 INFO L226 Difference]: Without dead ends: 169 [2022-07-21 04:09:00,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-07-21 04:09:00,871 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 2 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 04:09:00,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 752 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 04:09:00,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-21 04:09:00,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-07-21 04:09:00,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 127 states have (on average 1.047244094488189) internal successors, (133), 127 states have internal predecessors, (133), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-21 04:09:00,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 174 transitions. [2022-07-21 04:09:00,881 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 174 transitions. Word has length 126 [2022-07-21 04:09:00,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:09:00,881 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 174 transitions. [2022-07-21 04:09:00,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-21 04:09:00,881 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 174 transitions. [2022-07-21 04:09:00,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-21 04:09:00,882 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:09:00,882 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1] [2022-07-21 04:09:00,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-07-21 04:09:01,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-21 04:09:01,088 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:09:01,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:09:01,089 INFO L85 PathProgramCache]: Analyzing trace with hash 48456150, now seen corresponding path program 15 times [2022-07-21 04:09:01,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:09:01,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17092455] [2022-07-21 04:09:01,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:09:01,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:09:01,095 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:09:01,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [209875849] [2022-07-21 04:09:01,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 04:09:01,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:09:01,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:09:01,097 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:09:01,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 04:09:01,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-07-21 04:09:01,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:09:01,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-21 04:09:01,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:09:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 32 proven. 480 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-21 04:09:02,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:09:02,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:09:02,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17092455] [2022-07-21 04:09:02,354 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:09:02,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209875849] [2022-07-21 04:09:02,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209875849] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:09:02,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:09:02,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-07-21 04:09:02,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627411032] [2022-07-21 04:09:02,358 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:09:02,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 04:09:02,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:09:02,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 04:09:02,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-07-21 04:09:02,359 INFO L87 Difference]: Start difference. First operand 169 states and 174 transitions. Second operand has 21 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 17 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-21 04:09:02,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:09:02,854 INFO L93 Difference]: Finished difference Result 174 states and 178 transitions. [2022-07-21 04:09:02,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 04:09:02,856 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 17 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 134 [2022-07-21 04:09:02,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:09:02,859 INFO L225 Difference]: With dead ends: 174 [2022-07-21 04:09:02,859 INFO L226 Difference]: Without dead ends: 169 [2022-07-21 04:09:02,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-07-21 04:09:02,860 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 2 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 04:09:02,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 832 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 04:09:02,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-21 04:09:02,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-07-21 04:09:02,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 127 states have (on average 1.0393700787401574) internal successors, (132), 127 states have internal predecessors, (132), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-21 04:09:02,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 173 transitions. [2022-07-21 04:09:02,870 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 173 transitions. Word has length 134 [2022-07-21 04:09:02,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:09:02,871 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 173 transitions. [2022-07-21 04:09:02,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 17 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-21 04:09:02,871 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 173 transitions. [2022-07-21 04:09:02,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-21 04:09:02,872 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:09:02,872 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1] [2022-07-21 04:09:02,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-21 04:09:03,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-21 04:09:03,079 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:09:03,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:09:03,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1347219516, now seen corresponding path program 16 times [2022-07-21 04:09:03,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:09:03,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723965594] [2022-07-21 04:09:03,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:09:03,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:09:03,087 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:09:03,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377540415] [2022-07-21 04:09:03,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 04:09:03,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:09:03,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:09:03,088 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:09:03,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-21 04:09:04,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 04:09:04,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:09:04,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-21 04:09:04,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:09:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 34 proven. 544 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-07-21 04:09:04,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:09:04,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:09:04,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723965594] [2022-07-21 04:09:04,794 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:09:04,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377540415] [2022-07-21 04:09:04,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377540415] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:09:04,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:09:04,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-07-21 04:09:04,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677680227] [2022-07-21 04:09:04,795 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:09:04,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 04:09:04,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:09:04,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 04:09:04,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-07-21 04:09:04,796 INFO L87 Difference]: Start difference. First operand 169 states and 173 transitions. Second operand has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 18 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-21 04:09:05,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:09:05,364 INFO L93 Difference]: Finished difference Result 174 states and 177 transitions. [2022-07-21 04:09:05,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 04:09:05,365 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 18 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 142 [2022-07-21 04:09:05,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:09:05,366 INFO L225 Difference]: With dead ends: 174 [2022-07-21 04:09:05,366 INFO L226 Difference]: Without dead ends: 169 [2022-07-21 04:09:05,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-07-21 04:09:05,367 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 2 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 04:09:05,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 916 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 04:09:05,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-21 04:09:05,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-07-21 04:09:05,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 127 states have (on average 1.031496062992126) internal successors, (131), 127 states have internal predecessors, (131), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-21 04:09:05,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 172 transitions. [2022-07-21 04:09:05,378 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 172 transitions. Word has length 142 [2022-07-21 04:09:05,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:09:05,378 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 172 transitions. [2022-07-21 04:09:05,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 18 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-21 04:09:05,379 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 172 transitions. [2022-07-21 04:09:05,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-21 04:09:05,380 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:09:05,380 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1] [2022-07-21 04:09:05,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-21 04:09:05,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:09:05,587 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:09:05,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:09:05,588 INFO L85 PathProgramCache]: Analyzing trace with hash 764197026, now seen corresponding path program 17 times [2022-07-21 04:09:05,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:09:05,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372857078] [2022-07-21 04:09:05,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:09:05,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:09:05,596 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:09:05,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174209508] [2022-07-21 04:09:05,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 04:09:05,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:09:05,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:09:05,599 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:09:05,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-21 04:09:06,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-07-21 04:09:06,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:09:06,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-21 04:09:06,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:09:06,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 36 proven. 612 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-07-21 04:09:06,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:09:06,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:09:06,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372857078] [2022-07-21 04:09:06,907 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:09:06,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174209508] [2022-07-21 04:09:06,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174209508] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:09:06,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:09:06,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-07-21 04:09:06,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119375265] [2022-07-21 04:09:06,908 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:09:06,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 04:09:06,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:09:06,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 04:09:06,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-07-21 04:09:06,909 INFO L87 Difference]: Start difference. First operand 169 states and 172 transitions. Second operand has 23 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 19 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-21 04:09:07,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:09:07,512 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2022-07-21 04:09:07,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 04:09:07,513 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 19 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 150 [2022-07-21 04:09:07,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:09:07,514 INFO L225 Difference]: With dead ends: 174 [2022-07-21 04:09:07,514 INFO L226 Difference]: Without dead ends: 169 [2022-07-21 04:09:07,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-07-21 04:09:07,515 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 04:09:07,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1004 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 04:09:07,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-21 04:09:07,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-07-21 04:09:07,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 127 states have (on average 1.0236220472440944) internal successors, (130), 127 states have internal predecessors, (130), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-21 04:09:07,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2022-07-21 04:09:07,525 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 150 [2022-07-21 04:09:07,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:09:07,526 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2022-07-21 04:09:07,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 19 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-21 04:09:07,526 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2022-07-21 04:09:07,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-07-21 04:09:07,527 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:09:07,527 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1] [2022-07-21 04:09:07,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-21 04:09:07,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:09:07,734 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:09:07,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:09:07,734 INFO L85 PathProgramCache]: Analyzing trace with hash -439829752, now seen corresponding path program 18 times [2022-07-21 04:09:07,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:09:07,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736952921] [2022-07-21 04:09:07,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:09:07,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:09:07,741 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:09:07,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136606791] [2022-07-21 04:09:07,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 04:09:07,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:09:07,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:09:07,742 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:09:07,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-21 04:09:08,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-07-21 04:09:08,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:09:08,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-21 04:09:08,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:09:08,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 38 proven. 684 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-07-21 04:09:08,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:09:09,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:09:09,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736952921] [2022-07-21 04:09:09,144 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:09:09,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136606791] [2022-07-21 04:09:09,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136606791] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:09:09,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:09:09,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-07-21 04:09:09,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885901933] [2022-07-21 04:09:09,145 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:09:09,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 04:09:09,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:09:09,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 04:09:09,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-07-21 04:09:09,146 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand has 24 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 20 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-21 04:09:09,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:09:09,805 INFO L93 Difference]: Finished difference Result 174 states and 175 transitions. [2022-07-21 04:09:09,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 04:09:09,805 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 20 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 158 [2022-07-21 04:09:09,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:09:09,806 INFO L225 Difference]: With dead ends: 174 [2022-07-21 04:09:09,806 INFO L226 Difference]: Without dead ends: 169 [2022-07-21 04:09:09,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-07-21 04:09:09,807 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 2 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 04:09:09,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1096 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1287 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 04:09:09,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-21 04:09:09,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-07-21 04:09:09,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-21 04:09:09,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2022-07-21 04:09:09,818 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 158 [2022-07-21 04:09:09,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:09:09,818 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2022-07-21 04:09:09,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 20 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-21 04:09:09,819 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2022-07-21 04:09:09,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-07-21 04:09:09,820 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:09:09,820 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1] [2022-07-21 04:09:09,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-21 04:09:10,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-21 04:09:10,027 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:09:10,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:09:10,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1042741102, now seen corresponding path program 19 times [2022-07-21 04:09:10,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:09:10,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103322696] [2022-07-21 04:09:10,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:09:10,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:09:10,036 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:09:10,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128837769] [2022-07-21 04:09:10,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 04:09:10,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:09:10,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:09:10,038 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:09:10,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-21 04:09:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 04:09:10,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-21 04:09:10,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:09:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 40 proven. 760 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-07-21 04:09:11,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:09:11,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:09:11,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103322696] [2022-07-21 04:09:11,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:09:11,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128837769] [2022-07-21 04:09:11,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128837769] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:09:11,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:09:11,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-07-21 04:09:11,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142546108] [2022-07-21 04:09:11,339 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:09:11,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 04:09:11,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:09:11,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 04:09:11,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2022-07-21 04:09:11,342 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 25 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 21 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-21 04:09:12,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:09:12,091 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2022-07-21 04:09:12,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 04:09:12,092 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 21 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 166 [2022-07-21 04:09:12,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:09:12,093 INFO L225 Difference]: With dead ends: 176 [2022-07-21 04:09:12,093 INFO L226 Difference]: Without dead ends: 171 [2022-07-21 04:09:12,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-07-21 04:09:12,094 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 2 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 1414 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 04:09:12,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1192 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1414 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 04:09:12,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-21 04:09:12,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-07-21 04:09:12,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 22 states have call successors, (22), 21 states have call predecessors, (22), 20 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-21 04:09:12,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2022-07-21 04:09:12,107 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 166 [2022-07-21 04:09:12,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:09:12,107 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2022-07-21 04:09:12,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 21 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-21 04:09:12,113 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2022-07-21 04:09:12,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-21 04:09:12,115 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:09:12,115 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2022-07-21 04:09:12,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-21 04:09:12,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-21 04:09:12,322 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:09:12,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:09:12,322 INFO L85 PathProgramCache]: Analyzing trace with hash 2132106003, now seen corresponding path program 4 times [2022-07-21 04:09:12,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:09:12,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568760338] [2022-07-21 04:09:12,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:09:12,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:09:12,329 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:09:12,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423176327] [2022-07-21 04:09:12,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 04:09:12,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:09:12,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:09:12,331 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:09:12,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-21 04:09:13,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 04:09:13,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-07-21 04:09:13,207 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 04:09:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 04:09:13,667 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 04:09:13,667 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 04:09:13,668 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-21 04:09:13,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-21 04:09:13,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-21 04:09:13,880 INFO L356 BasicCegarLoop]: Path program histogram: [19, 4, 1, 1, 1, 1] [2022-07-21 04:09:13,883 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 04:09:13,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:09:13 BoogieIcfgContainer [2022-07-21 04:09:13,952 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 04:09:13,953 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 04:09:13,954 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 04:09:13,954 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 04:09:13,954 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:08:40" (3/4) ... [2022-07-21 04:09:13,956 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-21 04:09:14,044 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-21 04:09:14,044 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 04:09:14,045 INFO L158 Benchmark]: Toolchain (without parser) took 34514.21ms. Allocated memory was 58.7MB in the beginning and 104.9MB in the end (delta: 46.1MB). Free memory was 36.9MB in the beginning and 66.1MB in the end (delta: -29.2MB). Peak memory consumption was 16.1MB. Max. memory is 16.1GB. [2022-07-21 04:09:14,045 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 58.7MB. Free memory is still 40.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 04:09:14,045 INFO L158 Benchmark]: CACSL2BoogieTranslator took 269.26ms. Allocated memory is still 58.7MB. Free memory was 36.6MB in the beginning and 42.2MB in the end (delta: -5.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-21 04:09:14,046 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.47ms. Allocated memory is still 58.7MB. Free memory was 42.0MB in the beginning and 40.6MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 04:09:14,046 INFO L158 Benchmark]: Boogie Preprocessor took 31.89ms. Allocated memory is still 58.7MB. Free memory was 40.6MB in the beginning and 39.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 04:09:14,046 INFO L158 Benchmark]: RCFGBuilder took 255.04ms. Allocated memory is still 58.7MB. Free memory was 39.6MB in the beginning and 30.6MB in the end (delta: 9.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-21 04:09:14,048 INFO L158 Benchmark]: TraceAbstraction took 33820.75ms. Allocated memory was 58.7MB in the beginning and 104.9MB in the end (delta: 46.1MB). Free memory was 30.0MB in the beginning and 73.4MB in the end (delta: -43.4MB). Peak memory consumption was 4.8MB. Max. memory is 16.1GB. [2022-07-21 04:09:14,048 INFO L158 Benchmark]: Witness Printer took 90.84ms. Allocated memory is still 104.9MB. Free memory was 73.4MB in the beginning and 66.1MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-21 04:09:14,049 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 58.7MB. Free memory is still 40.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 269.26ms. Allocated memory is still 58.7MB. Free memory was 36.6MB in the beginning and 42.2MB in the end (delta: -5.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.47ms. Allocated memory is still 58.7MB. Free memory was 42.0MB in the beginning and 40.6MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 31.89ms. Allocated memory is still 58.7MB. Free memory was 40.6MB in the beginning and 39.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 255.04ms. Allocated memory is still 58.7MB. Free memory was 39.6MB in the beginning and 30.6MB in the end (delta: 9.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 33820.75ms. Allocated memory was 58.7MB in the beginning and 104.9MB in the end (delta: 46.1MB). Free memory was 30.0MB in the beginning and 73.4MB in the end (delta: -43.4MB). Peak memory consumption was 4.8MB. Max. memory is 16.1GB. * Witness Printer took 90.84ms. Allocated memory is still 104.9MB. Free memory was 73.4MB in the beginning and 66.1MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [c=0, counter=0, k=21, x=0, y=0] [L27] EXPR counter++ VAL [c=0, counter=1, counter++=0, k=21, x=0, y=0] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=1] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=0, counter=1, k=21, x=0, y=0] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=1, counter=1, k=21, x=1, y=1] [L27] EXPR counter++ VAL [c=1, counter=2, counter++=1, k=21, x=1, y=1] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=2] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=1, counter=2, k=21, x=1, y=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=2, counter=2, k=21, x=9, y=2] [L27] EXPR counter++ VAL [c=2, counter=3, counter++=2, k=21, x=9, y=2] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=3] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=2, counter=3, k=21, x=9, y=2] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=3, counter=3, k=21, x=36, y=3] [L27] EXPR counter++ VAL [c=3, counter=4, counter++=3, k=21, x=36, y=3] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=4] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=3, counter=4, k=21, x=36, y=3] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=4, counter=4, k=21, x=100, y=4] [L27] EXPR counter++ VAL [c=4, counter=5, counter++=4, k=21, x=100, y=4] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=5] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=4, counter=5, k=21, x=100, y=4] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=5, counter=5, k=21, x=225, y=5] [L27] EXPR counter++ VAL [c=5, counter=6, counter++=5, k=21, x=225, y=5] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=6] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=5, counter=6, k=21, x=225, y=5] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=6, counter=6, k=21, x=441, y=6] [L27] EXPR counter++ VAL [c=6, counter=7, counter++=6, k=21, x=441, y=6] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=7] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=6, counter=7, k=21, x=441, y=6] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=7, counter=7, k=21, x=784, y=7] [L27] EXPR counter++ VAL [c=7, counter=8, counter++=7, k=21, x=784, y=7] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=8] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=7, counter=8, k=21, x=784, y=7] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=8, counter=8, k=21, x=1296, y=8] [L27] EXPR counter++ VAL [c=8, counter=9, counter++=8, k=21, x=1296, y=8] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=9] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=8, counter=9, k=21, x=1296, y=8] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=9, counter=9, k=21, x=2025, y=9] [L27] EXPR counter++ VAL [c=9, counter=10, counter++=9, k=21, x=2025, y=9] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=10] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=9, counter=10, k=21, x=2025, y=9] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=10, counter=10, k=21, x=3025, y=10] [L27] EXPR counter++ VAL [c=10, counter=11, counter++=10, k=21, x=3025, y=10] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=11] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=10, counter=11, k=21, x=3025, y=10] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=11, counter=11, k=21, x=4356, y=11] [L27] EXPR counter++ VAL [c=11, counter=12, counter++=11, k=21, x=4356, y=11] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=12] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=12] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=11, counter=12, k=21, x=4356, y=11] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=12, counter=12, k=21, x=6084, y=12] [L27] EXPR counter++ VAL [c=12, counter=13, counter++=12, k=21, x=6084, y=12] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=13] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=12, counter=13, k=21, x=6084, y=12] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=13, counter=13, k=21, x=8281, y=13] [L27] EXPR counter++ VAL [c=13, counter=14, counter++=13, k=21, x=8281, y=13] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=14] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=14] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=13, counter=14, k=21, x=8281, y=13] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=14, counter=14, k=21, x=11025, y=14] [L27] EXPR counter++ VAL [c=14, counter=15, counter++=14, k=21, x=11025, y=14] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=15] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=15] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=14, counter=15, k=21, x=11025, y=14] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=15, counter=15, k=21, x=14400, y=15] [L27] EXPR counter++ VAL [c=15, counter=16, counter++=15, k=21, x=14400, y=15] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=16] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=16] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=15, counter=16, k=21, x=14400, y=15] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=16, counter=16, k=21, x=18496, y=16] [L27] EXPR counter++ VAL [c=16, counter=17, counter++=16, k=21, x=18496, y=16] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=17] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=16, counter=17, k=21, x=18496, y=16] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=17, counter=17, k=21, x=23409, y=17] [L27] EXPR counter++ VAL [c=17, counter=18, counter++=17, k=21, x=23409, y=17] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=18] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=18] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=17, counter=18, k=21, x=23409, y=17] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=18, counter=18, k=21, x=29241, y=18] [L27] EXPR counter++ VAL [c=18, counter=19, counter++=18, k=21, x=29241, y=18] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=19] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=19] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=18, counter=19, k=21, x=29241, y=18] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=19, counter=19, k=21, x=36100, y=19] [L27] EXPR counter++ VAL [c=19, counter=20, counter++=19, k=21, x=36100, y=19] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=20] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=20] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=19, counter=20, k=21, x=36100, y=19] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=20, counter=20, k=21, x=44100, y=20] [L27] EXPR counter++ VAL [c=20, counter=21, counter++=20, k=21, x=44100, y=20] [L27] COND FALSE !(counter++<20) [L37] CALL __VERIFIER_assert(k*y - (y*y) == 0) VAL [\old(cond)=0, counter=21] [L10] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=21] [L12] reach_error() VAL [\old(cond)=0, cond=0, counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 33.7s, OverallIterations: 27, TraceHistogramMax: 21, PathProgramHistogramMax: 19, EmptinessCheckTime: 0.0s, AutomataDifference: 7.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 345 SdHoareTripleChecker+Valid, 6.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 342 mSDsluCounter, 10663 SdHoareTripleChecker+Invalid, 5.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 9499 mSDsCounter, 74 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11281 IncrementalHoareTripleChecker+Invalid, 11355 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 74 mSolverCounterUnsat, 1164 mSDtfsCounter, 11281 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2440 GetRequests, 1973 SyntacticMatches, 22 SemanticMatches, 445 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 5.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=171occurred in iteration=26, InterpolantAutomatonStates: 394, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 26 MinimizatonAttempts, 80 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 9.7s SatisfiabilityAnalysisTime, 9.2s InterpolantComputationTime, 2137 NumberOfCodeBlocks, 2137 NumberOfCodeBlocksAsserted, 141 NumberOfCheckSat, 2099 ConstructedInterpolants, 0 QuantifiedInterpolants, 9726 SizeOfPredicates, 55 NumberOfNonLiveVariables, 5741 ConjunctsInSsa, 973 ConjunctsInUnsatCore, 30 InterpolantComputations, 4 PerfectInterpolantSequences, 6009/12004 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-07-21 04:09:14,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE