./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/ps5-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 e51b21c2da790a7136d7ad701fd2bec1367e3ae6dd3a60c613fa7cfa4db22905 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 14:00:57,572 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 14:00:57,574 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 14:00:57,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 14:00:57,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 14:00:57,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 14:00:57,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 14:00:57,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 14:00:57,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 14:00:57,642 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 14:00:57,643 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 14:00:57,644 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 14:00:57,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 14:00:57,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 14:00:57,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 14:00:57,653 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 14:00:57,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 14:00:57,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 14:00:57,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 14:00:57,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 14:00:57,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 14:00:57,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 14:00:57,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 14:00:57,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 14:00:57,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 14:00:57,672 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 14:00:57,672 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 14:00:57,674 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 14:00:57,674 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 14:00:57,675 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 14:00:57,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 14:00:57,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 14:00:57,677 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 14:00:57,678 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 14:00:57,679 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 14:00:57,679 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 14:00:57,679 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 14:00:57,679 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 14:00:57,680 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 14:00:57,681 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 14:00:57,681 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 14:00:57,682 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 14:00:57,705 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 14:00:57,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 14:00:57,706 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 14:00:57,706 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 14:00:57,707 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 14:00:57,707 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 14:00:57,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 14:00:57,708 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 14:00:57,708 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 14:00:57,708 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 14:00:57,709 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 14:00:57,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 14:00:57,709 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 14:00:57,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 14:00:57,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 14:00:57,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 14:00:57,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 14:00:57,710 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 14:00:57,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 14:00:57,710 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 14:00:57,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 14:00:57,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 14:00:57,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 14:00:57,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 14:00:57,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 14:00:57,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 14:00:57,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 14:00:57,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 14:00:57,712 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 14:00:57,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 14:00:57,712 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 14:00:57,712 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 14:00:57,712 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 14:00:57,713 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 14:00:57,713 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e51b21c2da790a7136d7ad701fd2bec1367e3ae6dd3a60c613fa7cfa4db22905 [2021-12-17 14:00:57,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 14:00:57,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 14:00:57,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 14:00:57,914 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 14:00:57,922 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 14:00:57,924 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound20.c [2021-12-17 14:00:58,001 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e312a94a/5e2a55ad107f4d0e9b6fc9b91aa3f429/FLAG85f9f5f8f [2021-12-17 14:00:58,329 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 14:00:58,329 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound20.c [2021-12-17 14:00:58,335 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e312a94a/5e2a55ad107f4d0e9b6fc9b91aa3f429/FLAG85f9f5f8f [2021-12-17 14:00:58,347 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e312a94a/5e2a55ad107f4d0e9b6fc9b91aa3f429 [2021-12-17 14:00:58,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 14:00:58,350 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 14:00:58,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 14:00:58,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 14:00:58,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 14:00:58,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:00:58" (1/1) ... [2021-12-17 14:00:58,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a74f343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:00:58, skipping insertion in model container [2021-12-17 14:00:58,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:00:58" (1/1) ... [2021-12-17 14:00:58,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 14:00:58,387 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 14:00:58,510 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/ps5-ll_unwindbound20.c[458,471] [2021-12-17 14:00:58,521 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 14:00:58,526 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 14:00:58,534 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/ps5-ll_unwindbound20.c[458,471] [2021-12-17 14:00:58,540 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 14:00:58,550 INFO L208 MainTranslator]: Completed translation [2021-12-17 14:00:58,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:00:58 WrapperNode [2021-12-17 14:00:58,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 14:00:58,552 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 14:00:58,552 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 14:00:58,552 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 14:00:58,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:00:58" (1/1) ... [2021-12-17 14:00:58,562 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:00:58" (1/1) ... [2021-12-17 14:00:58,574 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2021-12-17 14:00:58,580 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 14:00:58,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 14:00:58,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 14:00:58,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 14:00:58,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:00:58" (1/1) ... [2021-12-17 14:00:58,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:00:58" (1/1) ... [2021-12-17 14:00:58,589 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:00:58" (1/1) ... [2021-12-17 14:00:58,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:00:58" (1/1) ... [2021-12-17 14:00:58,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:00:58" (1/1) ... [2021-12-17 14:00:58,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:00:58" (1/1) ... [2021-12-17 14:00:58,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:00:58" (1/1) ... [2021-12-17 14:00:58,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 14:00:58,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 14:00:58,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 14:00:58,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 14:00:58,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:00:58" (1/1) ... [2021-12-17 14:00:58,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 14:00:58,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:00:58,623 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 14:00:58,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 14:00:58,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 14:00:58,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 14:00:58,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 14:00:58,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 14:00:58,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 14:00:58,658 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 14:00:58,702 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 14:00:58,703 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 14:00:58,787 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 14:00:58,791 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 14:00:58,792 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 14:00:58,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:00:58 BoogieIcfgContainer [2021-12-17 14:00:58,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 14:00:58,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 14:00:58,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 14:00:58,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 14:00:58,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 02:00:58" (1/3) ... [2021-12-17 14:00:58,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3319946b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:00:58, skipping insertion in model container [2021-12-17 14:00:58,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:00:58" (2/3) ... [2021-12-17 14:00:58,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3319946b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:00:58, skipping insertion in model container [2021-12-17 14:00:58,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:00:58" (3/3) ... [2021-12-17 14:00:58,799 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound20.c [2021-12-17 14:00:58,803 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 14:00:58,803 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 14:00:58,833 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 14:00:58,842 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 14:00:58,842 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 14:00:58,866 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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) [2021-12-17 14:00:58,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-17 14:00:58,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:00:58,873 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:00:58,873 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:00:58,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:00:58,881 INFO L85 PathProgramCache]: Analyzing trace with hash -579246775, now seen corresponding path program 1 times [2021-12-17 14:00:58,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:00:58,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868318897] [2021-12-17 14:00:58,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:00:58,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:00:58,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:00:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 14:00:59,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:00:59,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868318897] [2021-12-17 14:00:59,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868318897] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:00:59,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:00:59,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 14:00:59,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793415994] [2021-12-17 14:00:59,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:00:59,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 14:00:59,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:00:59,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 14:00:59,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 14:00:59,041 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-12-17 14:00:59,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:00:59,058 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2021-12-17 14:00:59,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 14:00:59,060 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 9 [2021-12-17 14:00:59,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:00:59,065 INFO L225 Difference]: With dead ends: 37 [2021-12-17 14:00:59,066 INFO L226 Difference]: Without dead ends: 16 [2021-12-17 14:00:59,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 14:00:59,071 INFO L933 BasicCegarLoop]: 23 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, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:00:59,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:00:59,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-17 14:00:59,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-17 14:00:59,099 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) [2021-12-17 14:00:59,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-12-17 14:00:59,102 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2021-12-17 14:00:59,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:00:59,102 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-12-17 14:00:59,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-12-17 14:00:59,103 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-12-17 14:00:59,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-17 14:00:59,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:00:59,104 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:00:59,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 14:00:59,105 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:00:59,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:00:59,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1986551203, now seen corresponding path program 1 times [2021-12-17 14:00:59,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:00:59,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907230574] [2021-12-17 14:00:59,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:00:59,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:00:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:00:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 14:00:59,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:00:59,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907230574] [2021-12-17 14:00:59,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907230574] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:00:59,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:00:59,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 14:00:59,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681102230] [2021-12-17 14:00:59,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:00:59,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:00:59,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:00:59,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:00:59,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 14:00:59,206 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 14:00:59,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:00:59,231 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-12-17 14:00:59,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 14:00:59,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-17 14:00:59,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:00:59,232 INFO L225 Difference]: With dead ends: 26 [2021-12-17 14:00:59,232 INFO L226 Difference]: Without dead ends: 18 [2021-12-17 14:00:59,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 14:00:59,248 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 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 [2021-12-17 14:00:59,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:00:59,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-17 14:00:59,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-17 14:00:59,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 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) [2021-12-17 14:00:59,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-12-17 14:00:59,253 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 10 [2021-12-17 14:00:59,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:00:59,253 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-12-17 14:00:59,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 14:00:59,254 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-12-17 14:00:59,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-17 14:00:59,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:00:59,254 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:00:59,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 14:00:59,254 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:00:59,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:00:59,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1984763743, now seen corresponding path program 1 times [2021-12-17 14:00:59,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:00:59,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458233497] [2021-12-17 14:00:59,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:00:59,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:00:59,263 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:00:59,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2084358896] [2021-12-17 14:00:59,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:00:59,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:00:59,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:00:59,287 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:00:59,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 14:00:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:00:59,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 14:00:59,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:00:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 14:00:59,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:00:59,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:00:59,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458233497] [2021-12-17 14:00:59,452 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:00:59,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084358896] [2021-12-17 14:00:59,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084358896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:00:59,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:00:59,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 14:00:59,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302859717] [2021-12-17 14:00:59,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:00:59,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 14:00:59,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:00:59,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 14:00:59,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 14:00:59,454 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 14:00:59,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:00:59,484 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-12-17 14:00:59,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:00:59,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-17 14:00:59,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:00:59,486 INFO L225 Difference]: With dead ends: 28 [2021-12-17 14:00:59,486 INFO L226 Difference]: Without dead ends: 24 [2021-12-17 14:00:59,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 14:00:59,487 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:00:59,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 62 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:00:59,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-17 14:00:59,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-17 14:00:59,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 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) [2021-12-17 14:00:59,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-17 14:00:59,492 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2021-12-17 14:00:59,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:00:59,492 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-17 14:00:59,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 14:00:59,493 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-17 14:00:59,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-17 14:00:59,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:00:59,493 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:00:59,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 14:00:59,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:00:59,724 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:00:59,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:00:59,725 INFO L85 PathProgramCache]: Analyzing trace with hash -69803837, now seen corresponding path program 1 times [2021-12-17 14:00:59,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:00:59,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611930928] [2021-12-17 14:00:59,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:00:59,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:00:59,733 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:00:59,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954237883] [2021-12-17 14:00:59,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:00:59,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:00:59,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:00:59,735 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:00:59,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 14:00:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:00:59,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 14:00:59,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:00:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 14:00:59,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:00:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 14:00:59,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:00:59,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611930928] [2021-12-17 14:00:59,934 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:00:59,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954237883] [2021-12-17 14:00:59,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954237883] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 14:00:59,934 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 14:00:59,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-12-17 14:00:59,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574737440] [2021-12-17 14:00:59,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 14:00:59,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 14:00:59,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:00:59,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 14:00:59,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-17 14:00:59,935 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 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) [2021-12-17 14:01:00,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:01:00,049 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2021-12-17 14:01:00,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 14:01:00,050 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 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 18 [2021-12-17 14:01:00,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:01:00,051 INFO L225 Difference]: With dead ends: 58 [2021-12-17 14:01:00,051 INFO L226 Difference]: Without dead ends: 50 [2021-12-17 14:01:00,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 14:01:00,052 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 41 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:01:00,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 93 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:01:00,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-17 14:01:00,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-12-17 14:01:00,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 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) [2021-12-17 14:01:00,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-12-17 14:01:00,061 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 18 [2021-12-17 14:01:00,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:01:00,061 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-12-17 14:01:00,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 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) [2021-12-17 14:01:00,062 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-12-17 14:01:00,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-17 14:01:00,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:01:00,063 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:01:00,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 14:01:00,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-17 14:01:00,278 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:01:00,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:01:00,278 INFO L85 PathProgramCache]: Analyzing trace with hash -68016377, now seen corresponding path program 1 times [2021-12-17 14:01:00,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:01:00,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911879641] [2021-12-17 14:01:00,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:00,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:01:00,284 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:01:00,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261627837] [2021-12-17 14:01:00,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:00,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:00,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:01:00,292 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:01:00,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 14:01:00,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:01:00,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 14:01:00,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:01:00,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 14:01:00,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:01:00,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 14:01:00,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:01:00,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911879641] [2021-12-17 14:01:00,538 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:01:00,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261627837] [2021-12-17 14:01:00,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261627837] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 14:01:00,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:01:00,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-17 14:01:00,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804108854] [2021-12-17 14:01:00,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:01:00,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 14:01:00,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:01:00,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 14:01:00,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 14:01:00,542 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-12-17 14:01:00,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:01:00,581 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-12-17 14:01:00,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:01:00,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 18 [2021-12-17 14:01:00,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:01:00,585 INFO L225 Difference]: With dead ends: 60 [2021-12-17 14:01:00,586 INFO L226 Difference]: Without dead ends: 52 [2021-12-17 14:01:00,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 14:01:00,589 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:01:00,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 47 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:01:00,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-17 14:01:00,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2021-12-17 14:01:00,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 14:01:00,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-12-17 14:01:00,610 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 18 [2021-12-17 14:01:00,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:01:00,610 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-12-17 14:01:00,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-12-17 14:01:00,610 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-12-17 14:01:00,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 14:01:00,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:01:00,611 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:01:00,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-17 14:01:00,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:00,817 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:01:00,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:01:00,817 INFO L85 PathProgramCache]: Analyzing trace with hash 156635680, now seen corresponding path program 1 times [2021-12-17 14:01:00,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:01:00,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54398369] [2021-12-17 14:01:00,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:00,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:01:00,823 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:01:00,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580868766] [2021-12-17 14:01:00,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:00,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:00,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:01:00,828 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:01:00,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 14:01:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:01:00,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 14:01:00,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:01:00,979 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 14:01:00,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:01:01,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:01:01,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54398369] [2021-12-17 14:01:01,171 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:01:01,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580868766] [2021-12-17 14:01:01,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580868766] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:01:01,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:01:01,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-12-17 14:01:01,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108290547] [2021-12-17 14:01:01,172 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:01:01,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 14:01:01,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:01:01,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 14:01:01,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:01:01,174 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 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) [2021-12-17 14:01:01,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:01:01,249 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2021-12-17 14:01:01,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 14:01:01,250 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 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 29 [2021-12-17 14:01:01,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:01:01,251 INFO L225 Difference]: With dead ends: 51 [2021-12-17 14:01:01,251 INFO L226 Difference]: Without dead ends: 45 [2021-12-17 14:01:01,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-17 14:01:01,252 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:01:01,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 111 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:01:01,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-17 14:01:01,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-12-17 14:01:01,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 14:01:01,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-12-17 14:01:01,261 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 29 [2021-12-17 14:01:01,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:01:01,262 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-12-17 14:01:01,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 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) [2021-12-17 14:01:01,263 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-12-17 14:01:01,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-17 14:01:01,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:01:01,264 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:01:01,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 14:01:01,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:01,467 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:01:01,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:01:01,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1793229318, now seen corresponding path program 2 times [2021-12-17 14:01:01,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:01:01,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646526247] [2021-12-17 14:01:01,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:01,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:01:01,474 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:01:01,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22039800] [2021-12-17 14:01:01,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 14:01:01,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:01,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:01:01,475 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:01:01,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 14:01:01,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 14:01:01,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:01:01,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 14:01:01,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:01:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 14:01:01,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:01:02,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:01:02,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646526247] [2021-12-17 14:01:02,028 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:01:02,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22039800] [2021-12-17 14:01:02,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22039800] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:01:02,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:01:02,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-12-17 14:01:02,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801111350] [2021-12-17 14:01:02,029 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:01:02,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 14:01:02,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:01:02,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 14:01:02,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-17 14:01:02,030 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 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) [2021-12-17 14:01:02,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:01:02,088 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-12-17 14:01:02,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 14:01:02,089 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 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 37 [2021-12-17 14:01:02,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:01:02,090 INFO L225 Difference]: With dead ends: 50 [2021-12-17 14:01:02,090 INFO L226 Difference]: Without dead ends: 44 [2021-12-17 14:01:02,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-17 14:01:02,091 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:01:02,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 150 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:01:02,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-17 14:01:02,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-17 14:01:02,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 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) [2021-12-17 14:01:02,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-12-17 14:01:02,095 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2021-12-17 14:01:02,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:01:02,095 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-12-17 14:01:02,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 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) [2021-12-17 14:01:02,096 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-12-17 14:01:02,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 14:01:02,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:01:02,097 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:01:02,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 14:01:02,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:02,302 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:01:02,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:01:02,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1183870932, now seen corresponding path program 3 times [2021-12-17 14:01:02,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:01:02,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802683651] [2021-12-17 14:01:02,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:02,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:01:02,308 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:01:02,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012712158] [2021-12-17 14:01:02,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 14:01:02,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:02,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:01:02,310 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:01:02,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 14:01:03,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 14:01:03,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:01:03,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 14:01:03,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:01:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 14:01:03,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:01:03,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:01:03,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802683651] [2021-12-17 14:01:03,432 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:01:03,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012712158] [2021-12-17 14:01:03,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012712158] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:01:03,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:01:03,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-12-17 14:01:03,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503665805] [2021-12-17 14:01:03,432 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:01:03,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 14:01:03,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:01:03,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 14:01:03,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-17 14:01:03,433 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 5 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) [2021-12-17 14:01:03,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:01:03,503 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-12-17 14:01:03,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 14:01:03,503 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 5 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 45 [2021-12-17 14:01:03,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:01:03,504 INFO L225 Difference]: With dead ends: 52 [2021-12-17 14:01:03,504 INFO L226 Difference]: Without dead ends: 46 [2021-12-17 14:01:03,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-17 14:01:03,504 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:01:03,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 202 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:01:03,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-17 14:01:03,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-17 14:01:03,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 14:01:03,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2021-12-17 14:01:03,509 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 45 [2021-12-17 14:01:03,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:01:03,509 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2021-12-17 14:01:03,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 5 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) [2021-12-17 14:01:03,509 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2021-12-17 14:01:03,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 14:01:03,510 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:01:03,510 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:01:03,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 14:01:03,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:03,715 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:01:03,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:01:03,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1854611729, now seen corresponding path program 1 times [2021-12-17 14:01:03,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:01:03,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192873244] [2021-12-17 14:01:03,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:03,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:01:03,724 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:01:03,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060141526] [2021-12-17 14:01:03,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:03,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:03,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:01:03,735 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:01:03,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 14:01:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:01:03,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 14:01:03,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:01:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 14:01:03,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:01:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 14:01:03,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:01:03,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192873244] [2021-12-17 14:01:03,966 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:01:03,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060141526] [2021-12-17 14:01:03,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060141526] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 14:01:03,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 14:01:03,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-12-17 14:01:03,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936038032] [2021-12-17 14:01:03,966 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 14:01:03,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 14:01:03,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:01:03,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 14:01:03,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-17 14:01:03,968 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-17 14:01:04,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:01:04,145 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2021-12-17 14:01:04,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-17 14:01:04,146 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 47 [2021-12-17 14:01:04,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:01:04,147 INFO L225 Difference]: With dead ends: 132 [2021-12-17 14:01:04,147 INFO L226 Difference]: Without dead ends: 122 [2021-12-17 14:01:04,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2021-12-17 14:01:04,149 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 107 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:01:04,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 159 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:01:04,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-17 14:01:04,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2021-12-17 14:01:04,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 74 states have internal predecessors, (76), 17 states have call successors, (17), 11 states have call predecessors, (17), 10 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-17 14:01:04,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2021-12-17 14:01:04,173 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 47 [2021-12-17 14:01:04,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:01:04,174 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2021-12-17 14:01:04,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-17 14:01:04,174 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2021-12-17 14:01:04,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-17 14:01:04,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:01:04,176 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:01:04,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 14:01:04,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:04,388 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:01:04,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:01:04,388 INFO L85 PathProgramCache]: Analyzing trace with hash 348710830, now seen corresponding path program 4 times [2021-12-17 14:01:04,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:01:04,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45921517] [2021-12-17 14:01:04,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:04,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:01:04,394 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:01:04,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1348445862] [2021-12-17 14:01:04,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 14:01:04,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:04,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:01:04,397 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:01:04,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 14:01:04,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 14:01:04,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:01:04,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 14:01:04,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:01:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-17 14:01:04,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:01:04,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:01:04,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45921517] [2021-12-17 14:01:04,719 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:01:04,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348445862] [2021-12-17 14:01:04,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348445862] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:01:04,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:01:04,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-12-17 14:01:04,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452821448] [2021-12-17 14:01:04,719 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:01:04,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 14:01:04,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:01:04,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 14:01:04,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-17 14:01:04,720 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 6 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) [2021-12-17 14:01:04,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:01:04,807 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2021-12-17 14:01:04,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 14:01:04,808 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 6 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 53 [2021-12-17 14:01:04,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:01:04,809 INFO L225 Difference]: With dead ends: 102 [2021-12-17 14:01:04,809 INFO L226 Difference]: Without dead ends: 96 [2021-12-17 14:01:04,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-17 14:01:04,809 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:01:04,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 246 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:01:04,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-17 14:01:04,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-12-17 14:01:04,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 73 states have internal predecessors, (75), 16 states have call successors, (16), 11 states have call predecessors, (16), 10 states have return successors, (15), 11 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-17 14:01:04,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2021-12-17 14:01:04,829 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 53 [2021-12-17 14:01:04,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:01:04,831 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2021-12-17 14:01:04,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 6 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) [2021-12-17 14:01:04,831 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2021-12-17 14:01:04,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-17 14:01:04,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:01:04,834 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:01:04,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 14:01:05,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 14:01:05,048 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:01:05,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:01:05,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1021371784, now seen corresponding path program 5 times [2021-12-17 14:01:05,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:01:05,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364971511] [2021-12-17 14:01:05,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:05,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:01:05,053 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:01:05,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548208166] [2021-12-17 14:01:05,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 14:01:05,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:05,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:01:05,054 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:01:05,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 14:01:07,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-17 14:01:07,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:01:07,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 14:01:07,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:01:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 14 proven. 60 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-17 14:01:07,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:01:07,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:01:07,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364971511] [2021-12-17 14:01:07,609 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:01:07,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548208166] [2021-12-17 14:01:07,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548208166] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:01:07,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:01:07,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-17 14:01:07,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114210583] [2021-12-17 14:01:07,610 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:01:07,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 14:01:07,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:01:07,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 14:01:07,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-17 14:01:07,610 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 7 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) [2021-12-17 14:01:07,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:01:07,717 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2021-12-17 14:01:07,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 14:01:07,718 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 7 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 61 [2021-12-17 14:01:07,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:01:07,719 INFO L225 Difference]: With dead ends: 101 [2021-12-17 14:01:07,719 INFO L226 Difference]: Without dead ends: 95 [2021-12-17 14:01:07,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-12-17 14:01:07,719 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:01:07,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 303 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:01:07,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-17 14:01:07,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-12-17 14:01:07,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 72 states have internal predecessors, (74), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-17 14:01:07,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2021-12-17 14:01:07,726 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 61 [2021-12-17 14:01:07,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:01:07,727 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2021-12-17 14:01:07,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 7 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) [2021-12-17 14:01:07,727 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2021-12-17 14:01:07,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 14:01:07,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:01:07,728 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:01:07,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 14:01:07,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:07,928 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:01:07,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:01:07,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1106405730, now seen corresponding path program 6 times [2021-12-17 14:01:07,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:01:07,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484105621] [2021-12-17 14:01:07,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:07,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:01:07,934 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:01:07,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354566908] [2021-12-17 14:01:07,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 14:01:07,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:07,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:01:07,936 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:01:07,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 14:01:32,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-17 14:01:32,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:01:32,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 14:01:32,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:01:32,551 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-17 14:01:32,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:01:32,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:01:32,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484105621] [2021-12-17 14:01:32,685 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:01:32,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354566908] [2021-12-17 14:01:32,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354566908] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:01:32,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:01:32,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-12-17 14:01:32,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931578315] [2021-12-17 14:01:32,685 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:01:32,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 14:01:32,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:01:32,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 14:01:32,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-12-17 14:01:32,686 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 8 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) [2021-12-17 14:01:32,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:01:32,802 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2021-12-17 14:01:32,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 14:01:32,802 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 8 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 69 [2021-12-17 14:01:32,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:01:32,803 INFO L225 Difference]: With dead ends: 100 [2021-12-17 14:01:32,803 INFO L226 Difference]: Without dead ends: 94 [2021-12-17 14:01:32,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-12-17 14:01:32,804 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:01:32,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 366 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:01:32,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-17 14:01:32,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-12-17 14:01:32,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 71 states have internal predecessors, (73), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-17 14:01:32,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2021-12-17 14:01:32,814 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 69 [2021-12-17 14:01:32,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:01:32,815 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2021-12-17 14:01:32,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 8 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) [2021-12-17 14:01:32,815 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2021-12-17 14:01:32,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 14:01:32,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:01:32,817 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:01:32,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 14:01:33,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 14:01:33,023 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:01:33,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:01:33,024 INFO L85 PathProgramCache]: Analyzing trace with hash -317230276, now seen corresponding path program 7 times [2021-12-17 14:01:33,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:01:33,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480278911] [2021-12-17 14:01:33,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:33,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:01:33,031 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:01:33,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330862565] [2021-12-17 14:01:33,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 14:01:33,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:33,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:01:33,032 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:01:33,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 14:01:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:01:36,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 14:01:36,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:01:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 18 proven. 112 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-17 14:01:36,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:01:36,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:01:36,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480278911] [2021-12-17 14:01:36,982 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:01:36,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330862565] [2021-12-17 14:01:36,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330862565] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:01:36,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:01:36,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-12-17 14:01:36,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624553365] [2021-12-17 14:01:36,982 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:01:36,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 14:01:36,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:01:36,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 14:01:36,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-12-17 14:01:36,983 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 9 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) [2021-12-17 14:01:37,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:01:37,124 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2021-12-17 14:01:37,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 14:01:37,135 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 9 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 77 [2021-12-17 14:01:37,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:01:37,135 INFO L225 Difference]: With dead ends: 99 [2021-12-17 14:01:37,135 INFO L226 Difference]: Without dead ends: 93 [2021-12-17 14:01:37,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-12-17 14:01:37,136 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:01:37,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 435 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:01:37,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-17 14:01:37,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-12-17 14:01:37,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 70 states have internal predecessors, (72), 13 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-17 14:01:37,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2021-12-17 14:01:37,142 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 77 [2021-12-17 14:01:37,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:01:37,142 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2021-12-17 14:01:37,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 9 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) [2021-12-17 14:01:37,142 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2021-12-17 14:01:37,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-17 14:01:37,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:01:37,146 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:01:37,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 14:01:37,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 14:01:37,354 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:01:37,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:01:37,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1298793238, now seen corresponding path program 8 times [2021-12-17 14:01:37,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:01:37,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843810033] [2021-12-17 14:01:37,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:37,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:01:37,360 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:01:37,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1773472634] [2021-12-17 14:01:37,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 14:01:37,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:37,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:01:37,361 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:01:37,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 14:01:40,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 14:01:40,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:01:40,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 14:01:40,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:01:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-17 14:01:40,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:01:40,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:01:40,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843810033] [2021-12-17 14:01:40,853 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:01:40,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773472634] [2021-12-17 14:01:40,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773472634] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:01:40,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:01:40,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-12-17 14:01:40,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013680306] [2021-12-17 14:01:40,854 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:01:40,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 14:01:40,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:01:40,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 14:01:40,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-12-17 14:01:40,855 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 10 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) [2021-12-17 14:01:41,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:01:41,025 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2021-12-17 14:01:41,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 14:01:41,026 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 10 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 85 [2021-12-17 14:01:41,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:01:41,026 INFO L225 Difference]: With dead ends: 98 [2021-12-17 14:01:41,026 INFO L226 Difference]: Without dead ends: 92 [2021-12-17 14:01:41,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-12-17 14:01:41,027 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 2 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:01:41,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 510 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:01:41,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-17 14:01:41,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-12-17 14:01:41,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 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) [2021-12-17 14:01:41,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2021-12-17 14:01:41,032 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 85 [2021-12-17 14:01:41,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:01:41,033 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2021-12-17 14:01:41,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 10 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) [2021-12-17 14:01:41,033 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2021-12-17 14:01:41,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-17 14:01:41,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:01:41,033 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:01:41,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 14:01:41,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-17 14:01:41,234 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:01:41,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:01:41,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1207691024, now seen corresponding path program 9 times [2021-12-17 14:01:41,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:01:41,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020619014] [2021-12-17 14:01:41,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:01:41,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:01:41,240 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:01:41,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592571436] [2021-12-17 14:01:41,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 14:01:41,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:01:41,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:01:41,241 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:01:41,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process Killed by 15