./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.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 ca2134f8a32f49a0943527ee47fd89b4eb01286294fd09a8197c7c707de74c1d --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 03:30:56,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 03:30:56,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 03:30:56,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 03:30:56,875 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 03:30:56,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 03:30:56,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 03:30:56,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 03:30:56,890 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 03:30:56,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 03:30:56,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 03:30:56,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 03:30:56,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 03:30:56,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 03:30:56,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 03:30:56,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 03:30:56,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 03:30:56,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 03:30:56,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 03:30:56,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 03:30:56,912 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 03:30:56,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 03:30:56,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 03:30:56,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 03:30:56,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 03:30:56,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 03:30:56,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 03:30:56,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 03:30:56,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 03:30:56,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 03:30:56,928 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 03:30:56,928 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 03:30:56,930 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 03:30:56,930 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 03:30:56,931 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 03:30:56,932 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 03:30:56,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 03:30:56,933 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 03:30:56,933 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 03:30:56,933 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 03:30:56,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 03:30:56,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 03:30:56,940 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 03:30:56,965 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 03:30:56,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 03:30:56,965 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 03:30:56,965 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 03:30:56,966 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 03:30:56,966 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 03:30:56,966 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 03:30:56,966 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 03:30:56,966 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 03:30:56,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 03:30:56,967 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 03:30:56,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 03:30:56,967 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 03:30:56,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 03:30:56,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 03:30:56,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 03:30:56,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 03:30:56,968 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 03:30:56,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 03:30:56,968 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 03:30:56,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 03:30:56,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 03:30:56,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 03:30:56,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 03:30:56,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 03:30:56,968 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 03:30:56,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 03:30:56,969 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 03:30:56,969 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 03:30:56,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 03:30:56,969 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 03:30:56,969 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 03:30:56,969 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 03:30:56,969 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca2134f8a32f49a0943527ee47fd89b4eb01286294fd09a8197c7c707de74c1d [2022-07-21 03:30:57,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 03:30:57,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 03:30:57,315 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 03:30:57,316 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 03:30:57,317 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 03:30:57,318 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2022-07-21 03:30:57,380 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c6275474/74cfe54a9c1d4944a5203042e1a91749/FLAGafe7704db [2022-07-21 03:30:57,856 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 03:30:57,859 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2022-07-21 03:30:57,864 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c6275474/74cfe54a9c1d4944a5203042e1a91749/FLAGafe7704db [2022-07-21 03:30:58,350 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c6275474/74cfe54a9c1d4944a5203042e1a91749 [2022-07-21 03:30:58,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 03:30:58,353 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 03:30:58,354 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 03:30:58,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 03:30:58,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 03:30:58,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:30:58" (1/1) ... [2022-07-21 03:30:58,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68bd01d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:30:58, skipping insertion in model container [2022-07-21 03:30:58,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:30:58" (1/1) ... [2022-07-21 03:30:58,370 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 03:30:58,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 03:30:58,499 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/fermat1-ll_unwindbound50.c[535,548] [2022-07-21 03:30:58,526 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 03:30:58,533 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 03:30:58,575 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/fermat1-ll_unwindbound50.c[535,548] [2022-07-21 03:30:58,590 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 03:30:58,602 INFO L208 MainTranslator]: Completed translation [2022-07-21 03:30:58,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:30:58 WrapperNode [2022-07-21 03:30:58,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 03:30:58,608 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 03:30:58,608 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 03:30:58,608 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 03:30:58,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:30:58" (1/1) ... [2022-07-21 03:30:58,626 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:30:58" (1/1) ... [2022-07-21 03:30:58,646 INFO L137 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-07-21 03:30:58,647 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 03:30:58,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 03:30:58,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 03:30:58,648 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 03:30:58,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:30:58" (1/1) ... [2022-07-21 03:30:58,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:30:58" (1/1) ... [2022-07-21 03:30:58,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:30:58" (1/1) ... [2022-07-21 03:30:58,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:30:58" (1/1) ... [2022-07-21 03:30:58,671 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:30:58" (1/1) ... [2022-07-21 03:30:58,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:30:58" (1/1) ... [2022-07-21 03:30:58,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:30:58" (1/1) ... [2022-07-21 03:30:58,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 03:30:58,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 03:30:58,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 03:30:58,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 03:30:58,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:30:58" (1/1) ... [2022-07-21 03:30:58,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 03:30:58,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:30:58,716 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 03:30:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 03:30:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-21 03:30:58,757 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-21 03:30:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 03:30:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 03:30:58,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 03:30:58,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 03:30:58,758 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 03:30:58,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 03:30:58,816 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 03:30:58,818 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 03:30:58,960 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 03:30:58,965 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 03:30:58,966 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 03:30:58,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:30:58 BoogieIcfgContainer [2022-07-21 03:30:58,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 03:30:58,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 03:30:58,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 03:30:58,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 03:30:58,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:30:58" (1/3) ... [2022-07-21 03:30:58,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2431e675 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:30:58, skipping insertion in model container [2022-07-21 03:30:58,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:30:58" (2/3) ... [2022-07-21 03:30:58,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2431e675 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:30:58, skipping insertion in model container [2022-07-21 03:30:59,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:30:58" (3/3) ... [2022-07-21 03:30:59,002 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound50.c [2022-07-21 03:30:59,013 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 03:30:59,014 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 03:30:59,058 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 03:30:59,067 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@a54d29c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@35b7f48c [2022-07-21 03:30:59,067 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 03:30:59,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 03:30:59,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 03:30:59,094 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:30:59,094 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:30:59,095 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:30:59,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:30:59,100 INFO L85 PathProgramCache]: Analyzing trace with hash 738208203, now seen corresponding path program 1 times [2022-07-21 03:30:59,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:30:59,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825460419] [2022-07-21 03:30:59,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:30:59,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:30:59,213 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:30:59,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [105180727] [2022-07-21 03:30:59,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:30:59,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:30:59,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:30:59,220 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:30:59,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 03:30:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:30:59,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-21 03:30:59,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:30:59,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 03:30:59,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:30:59,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:30:59,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825460419] [2022-07-21 03:30:59,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:30:59,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105180727] [2022-07-21 03:30:59,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105180727] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:30:59,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:30:59,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 03:30:59,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094546650] [2022-07-21 03:30:59,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:30:59,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 03:30:59,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:30:59,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 03:30:59,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 03:30:59,377 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 03:30:59,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:30:59,403 INFO L93 Difference]: Finished difference Result 61 states and 94 transitions. [2022-07-21 03:30:59,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 03:30:59,413 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-07-21 03:30:59,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:30:59,419 INFO L225 Difference]: With dead ends: 61 [2022-07-21 03:30:59,420 INFO L226 Difference]: Without dead ends: 28 [2022-07-21 03:30:59,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 03:30:59,430 INFO L413 NwaCegarLoop]: 41 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, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:30:59,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:30:59,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-21 03:30:59,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-21 03:30:59,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 03:30:59,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-07-21 03:30:59,477 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 18 [2022-07-21 03:30:59,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:30:59,478 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-07-21 03:30:59,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 03:30:59,478 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-07-21 03:30:59,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-21 03:30:59,480 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:30:59,480 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:30:59,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 03:30:59,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-21 03:30:59,700 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:30:59,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:30:59,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1770759922, now seen corresponding path program 1 times [2022-07-21 03:30:59,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:30:59,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816763592] [2022-07-21 03:30:59,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:30:59,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:30:59,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:30:59,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157312963] [2022-07-21 03:30:59,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:30:59,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:30:59,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:30:59,719 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:30:59,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 03:30:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:30:59,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 03:30:59,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:30:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:30:59,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:30:59,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:30:59,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816763592] [2022-07-21 03:30:59,848 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:30:59,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157312963] [2022-07-21 03:30:59,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157312963] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:30:59,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:30:59,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 03:30:59,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147197010] [2022-07-21 03:30:59,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:30:59,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 03:30:59,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:30:59,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 03:30:59,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 03:30:59,854 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 03:30:59,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:30:59,880 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-07-21 03:30:59,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 03:30:59,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-07-21 03:30:59,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:30:59,883 INFO L225 Difference]: With dead ends: 37 [2022-07-21 03:30:59,883 INFO L226 Difference]: Without dead ends: 30 [2022-07-21 03:30:59,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 03:30:59,887 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:30:59,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:30:59,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-21 03:30:59,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-21 03:30:59,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 03:30:59,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-07-21 03:30:59,899 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 19 [2022-07-21 03:30:59,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:30:59,900 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-07-21 03:30:59,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 03:30:59,900 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-07-21 03:30:59,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-21 03:30:59,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:30:59,901 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:30:59,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 03:31:00,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-07-21 03:31:00,104 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:31:00,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:31:00,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1769091626, now seen corresponding path program 1 times [2022-07-21 03:31:00,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:31:00,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041847395] [2022-07-21 03:31:00,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:00,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:31:00,117 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:31:00,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626417252] [2022-07-21 03:31:00,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:00,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:00,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:31:00,119 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:31:00,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 03:31:00,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:31:00,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 03:31:00,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:31:00,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:31:00,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:31:00,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:31:00,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041847395] [2022-07-21 03:31:00,500 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:31:00,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626417252] [2022-07-21 03:31:00,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626417252] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:31:00,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:31:00,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 03:31:00,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415308713] [2022-07-21 03:31:00,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:31:00,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:31:00,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:31:00,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:31:00,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 03:31:00,503 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 03:31:01,761 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:31:03,935 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:31:06,936 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:31:06,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:31:06,960 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2022-07-21 03:31:06,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 03:31:06,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-07-21 03:31:06,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:31:06,962 INFO L225 Difference]: With dead ends: 49 [2022-07-21 03:31:06,962 INFO L226 Difference]: Without dead ends: 47 [2022-07-21 03:31:06,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 03:31:06,963 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-07-21 03:31:06,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 100 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-07-21 03:31:06,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-21 03:31:06,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-07-21 03:31:06,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.393939393939394) internal successors, (46), 34 states have internal predecessors, (46), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 03:31:06,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2022-07-21 03:31:06,973 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 19 [2022-07-21 03:31:06,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:31:06,973 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2022-07-21 03:31:06,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 03:31:06,974 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2022-07-21 03:31:06,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 03:31:06,974 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:31:06,975 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:31:07,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 03:31:07,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:07,196 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:31:07,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:31:07,197 INFO L85 PathProgramCache]: Analyzing trace with hash -82041861, now seen corresponding path program 1 times [2022-07-21 03:31:07,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:31:07,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538652374] [2022-07-21 03:31:07,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:07,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:31:07,206 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:31:07,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059881571] [2022-07-21 03:31:07,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:07,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:07,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:31:07,210 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:31:07,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 03:31:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:31:07,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 03:31:07,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:31:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:31:07,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:31:07,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:31:07,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:31:07,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538652374] [2022-07-21 03:31:07,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:31:07,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059881571] [2022-07-21 03:31:07,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059881571] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:31:07,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:31:07,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-07-21 03:31:07,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482417399] [2022-07-21 03:31:07,490 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:31:07,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 03:31:07,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:31:07,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 03:31:07,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-21 03:31:07,492 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 03:31:07,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:31:07,711 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2022-07-21 03:31:07,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 03:31:07,712 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2022-07-21 03:31:07,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:31:07,713 INFO L225 Difference]: With dead ends: 53 [2022-07-21 03:31:07,713 INFO L226 Difference]: Without dead ends: 48 [2022-07-21 03:31:07,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-07-21 03:31:07,714 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 03:31:07,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 139 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 03:31:07,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-21 03:31:07,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2022-07-21 03:31:07,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 03:31:07,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-07-21 03:31:07,730 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 25 [2022-07-21 03:31:07,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:31:07,730 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-07-21 03:31:07,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 03:31:07,730 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-07-21 03:31:07,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-21 03:31:07,732 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:31:07,732 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:31:07,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 03:31:07,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:07,952 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:31:07,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:31:07,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1145481658, now seen corresponding path program 1 times [2022-07-21 03:31:07,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:31:07,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087028823] [2022-07-21 03:31:07,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:07,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:31:07,961 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:31:07,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647841865] [2022-07-21 03:31:07,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:07,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:07,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:31:07,963 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:31:07,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 03:31:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:31:07,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 03:31:08,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:31:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:31:08,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:31:08,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:31:08,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087028823] [2022-07-21 03:31:08,066 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:31:08,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647841865] [2022-07-21 03:31:08,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647841865] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:31:08,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:31:08,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 03:31:08,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55676735] [2022-07-21 03:31:08,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:31:08,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:31:08,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:31:08,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:31:08,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 03:31:08,068 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 03:31:08,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:31:08,096 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-07-21 03:31:08,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 03:31:08,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-07-21 03:31:08,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:31:08,097 INFO L225 Difference]: With dead ends: 61 [2022-07-21 03:31:08,098 INFO L226 Difference]: Without dead ends: 40 [2022-07-21 03:31:08,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 03:31:08,099 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:31:08,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 93 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:31:08,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-21 03:31:08,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-07-21 03:31:08,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 03:31:08,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2022-07-21 03:31:08,109 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 31 [2022-07-21 03:31:08,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:31:08,109 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2022-07-21 03:31:08,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 03:31:08,110 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2022-07-21 03:31:08,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 03:31:08,111 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:31:08,111 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:31:08,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 03:31:08,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:08,328 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:31:08,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:31:08,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1102972225, now seen corresponding path program 1 times [2022-07-21 03:31:08,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:31:08,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142400300] [2022-07-21 03:31:08,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:08,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:31:08,337 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:31:08,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224012655] [2022-07-21 03:31:08,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:08,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:08,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:31:08,339 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:31:08,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 03:31:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:31:08,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 03:31:08,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:31:08,444 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:31:08,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:31:08,504 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 03:31:08,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:31:08,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142400300] [2022-07-21 03:31:08,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:31:08,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224012655] [2022-07-21 03:31:08,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224012655] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 03:31:08,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 03:31:08,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2022-07-21 03:31:08,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817371769] [2022-07-21 03:31:08,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:31:08,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 03:31:08,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:31:08,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 03:31:08,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-21 03:31:08,510 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 03:31:08,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:31:08,561 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2022-07-21 03:31:08,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 03:31:08,563 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2022-07-21 03:31:08,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:31:08,568 INFO L225 Difference]: With dead ends: 70 [2022-07-21 03:31:08,568 INFO L226 Difference]: Without dead ends: 49 [2022-07-21 03:31:08,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-21 03:31:08,571 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 29 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:31:08,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 99 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:31:08,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-21 03:31:08,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-07-21 03:31:08,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-21 03:31:08,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-07-21 03:31:08,591 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 37 [2022-07-21 03:31:08,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:31:08,591 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-07-21 03:31:08,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 03:31:08,592 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-07-21 03:31:08,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-21 03:31:08,593 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:31:08,593 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:31:08,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 03:31:08,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:08,812 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:31:08,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:31:08,813 INFO L85 PathProgramCache]: Analyzing trace with hash 30895492, now seen corresponding path program 1 times [2022-07-21 03:31:08,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:31:08,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114728656] [2022-07-21 03:31:08,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:08,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:31:08,821 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:31:08,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448098118] [2022-07-21 03:31:08,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:08,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:08,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:31:08,823 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:31:08,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 03:31:08,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:31:08,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 03:31:08,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:31:08,918 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:31:08,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:31:08,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 03:31:08,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:31:08,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114728656] [2022-07-21 03:31:08,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:31:08,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448098118] [2022-07-21 03:31:08,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448098118] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:31:08,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:31:08,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-07-21 03:31:08,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916164410] [2022-07-21 03:31:08,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:31:08,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 03:31:08,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:31:08,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 03:31:08,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-21 03:31:08,976 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-21 03:31:09,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:31:09,109 INFO L93 Difference]: Finished difference Result 125 states and 156 transitions. [2022-07-21 03:31:09,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 03:31:09,110 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 39 [2022-07-21 03:31:09,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:31:09,112 INFO L225 Difference]: With dead ends: 125 [2022-07-21 03:31:09,112 INFO L226 Difference]: Without dead ends: 104 [2022-07-21 03:31:09,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-07-21 03:31:09,115 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 90 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:31:09,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 165 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 03:31:09,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-21 03:31:09,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2022-07-21 03:31:09,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 68 states have internal predecessors, (82), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-21 03:31:09,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2022-07-21 03:31:09,150 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 39 [2022-07-21 03:31:09,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:31:09,150 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2022-07-21 03:31:09,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-21 03:31:09,151 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2022-07-21 03:31:09,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-21 03:31:09,155 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:31:09,156 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:31:09,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 03:31:09,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:09,371 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:31:09,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:31:09,372 INFO L85 PathProgramCache]: Analyzing trace with hash -798356602, now seen corresponding path program 1 times [2022-07-21 03:31:09,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:31:09,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075242611] [2022-07-21 03:31:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:09,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:31:09,380 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:31:09,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010951380] [2022-07-21 03:31:09,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:09,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:09,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:31:09,382 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:31:09,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 03:31:09,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:31:09,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 03:31:09,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:31:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-21 03:31:09,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:31:09,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:31:09,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075242611] [2022-07-21 03:31:09,466 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:31:09,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010951380] [2022-07-21 03:31:09,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010951380] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:31:09,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:31:09,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 03:31:09,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808542739] [2022-07-21 03:31:09,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:31:09,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 03:31:09,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:31:09,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 03:31:09,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 03:31:09,468 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-21 03:31:09,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:31:09,516 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2022-07-21 03:31:09,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 03:31:09,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 43 [2022-07-21 03:31:09,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:31:09,519 INFO L225 Difference]: With dead ends: 154 [2022-07-21 03:31:09,519 INFO L226 Difference]: Without dead ends: 115 [2022-07-21 03:31:09,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 03:31:09,521 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 23 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:31:09,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 86 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:31:09,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-21 03:31:09,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2022-07-21 03:31:09,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 79 states have internal predecessors, (96), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-21 03:31:09,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2022-07-21 03:31:09,549 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 43 [2022-07-21 03:31:09,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:31:09,549 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2022-07-21 03:31:09,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-21 03:31:09,549 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2022-07-21 03:31:09,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 03:31:09,550 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:31:09,550 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:31:09,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 03:31:09,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-21 03:31:09,773 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:31:09,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:31:09,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1023958197, now seen corresponding path program 1 times [2022-07-21 03:31:09,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:31:09,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010310950] [2022-07-21 03:31:09,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:09,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:31:09,781 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:31:09,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928280624] [2022-07-21 03:31:09,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:09,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:09,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:31:09,786 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:31:09,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 03:31:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:31:09,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 03:31:09,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:31:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:31:09,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:31:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-21 03:31:09,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:31:09,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010310950] [2022-07-21 03:31:09,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:31:09,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928280624] [2022-07-21 03:31:09,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928280624] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:31:09,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:31:09,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2022-07-21 03:31:09,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221679057] [2022-07-21 03:31:09,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:31:09,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 03:31:09,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:31:09,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 03:31:09,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-07-21 03:31:09,974 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-21 03:31:10,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:31:10,177 INFO L93 Difference]: Finished difference Result 215 states and 279 transitions. [2022-07-21 03:31:10,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 03:31:10,178 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 45 [2022-07-21 03:31:10,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:31:10,179 INFO L225 Difference]: With dead ends: 215 [2022-07-21 03:31:10,179 INFO L226 Difference]: Without dead ends: 168 [2022-07-21 03:31:10,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-07-21 03:31:10,181 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 140 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:31:10,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 199 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 03:31:10,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-21 03:31:10,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 149. [2022-07-21 03:31:10,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 111 states have (on average 1.2432432432432432) internal successors, (138), 112 states have internal predecessors, (138), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-07-21 03:31:10,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 193 transitions. [2022-07-21 03:31:10,200 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 193 transitions. Word has length 45 [2022-07-21 03:31:10,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:31:10,200 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 193 transitions. [2022-07-21 03:31:10,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-21 03:31:10,201 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 193 transitions. [2022-07-21 03:31:10,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 03:31:10,201 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:31:10,202 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:31:10,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 03:31:10,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:10,424 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:31:10,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:31:10,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1104536814, now seen corresponding path program 1 times [2022-07-21 03:31:10,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:31:10,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533598037] [2022-07-21 03:31:10,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:10,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:31:10,432 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:31:10,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479707407] [2022-07-21 03:31:10,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:10,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:10,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:31:10,436 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:31:10,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 03:31:10,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:31:10,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 03:31:10,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:31:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:31:10,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:31:10,670 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 03:31:10,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:31:10,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533598037] [2022-07-21 03:31:10,670 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:31:10,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479707407] [2022-07-21 03:31:10,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479707407] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:31:10,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:31:10,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-07-21 03:31:10,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265962793] [2022-07-21 03:31:10,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:31:10,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 03:31:10,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:31:10,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 03:31:10,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-21 03:31:10,673 INFO L87 Difference]: Start difference. First operand 149 states and 193 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-07-21 03:31:10,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:31:10,924 INFO L93 Difference]: Finished difference Result 207 states and 274 transitions. [2022-07-21 03:31:10,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 03:31:10,924 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 51 [2022-07-21 03:31:10,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:31:10,926 INFO L225 Difference]: With dead ends: 207 [2022-07-21 03:31:10,926 INFO L226 Difference]: Without dead ends: 202 [2022-07-21 03:31:10,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2022-07-21 03:31:10,927 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 242 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 03:31:10,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 276 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 03:31:10,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-21 03:31:10,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2022-07-21 03:31:10,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 144 states have (on average 1.2361111111111112) internal successors, (178), 148 states have internal predecessors, (178), 38 states have call successors, (38), 12 states have call predecessors, (38), 11 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2022-07-21 03:31:10,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 253 transitions. [2022-07-21 03:31:10,950 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 253 transitions. Word has length 51 [2022-07-21 03:31:10,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:31:10,950 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 253 transitions. [2022-07-21 03:31:10,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-07-21 03:31:10,951 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 253 transitions. [2022-07-21 03:31:10,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-21 03:31:10,952 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:31:10,953 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:31:10,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 03:31:11,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 03:31:11,168 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:31:11,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:31:11,168 INFO L85 PathProgramCache]: Analyzing trace with hash 540498080, now seen corresponding path program 1 times [2022-07-21 03:31:11,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:31:11,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7992752] [2022-07-21 03:31:11,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:11,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:31:11,177 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:31:11,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289030249] [2022-07-21 03:31:11,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:11,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:11,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:31:11,179 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:31:11,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 03:31:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:31:11,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 03:31:11,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:31:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-07-21 03:31:11,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:31:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-07-21 03:31:11,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:31:11,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7992752] [2022-07-21 03:31:11,359 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:31:11,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289030249] [2022-07-21 03:31:11,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289030249] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:31:11,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:31:11,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-07-21 03:31:11,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442088031] [2022-07-21 03:31:11,360 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:31:11,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 03:31:11,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:31:11,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 03:31:11,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 03:31:11,362 INFO L87 Difference]: Start difference. First operand 194 states and 253 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-21 03:31:11,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:31:11,454 INFO L93 Difference]: Finished difference Result 498 states and 693 transitions. [2022-07-21 03:31:11,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 03:31:11,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 87 [2022-07-21 03:31:11,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:31:11,458 INFO L225 Difference]: With dead ends: 498 [2022-07-21 03:31:11,458 INFO L226 Difference]: Without dead ends: 355 [2022-07-21 03:31:11,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 03:31:11,461 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 16 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:31:11,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 130 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:31:11,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-07-21 03:31:11,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 338. [2022-07-21 03:31:11,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 254 states have (on average 1.2677165354330708) internal successors, (322), 260 states have internal predecessors, (322), 72 states have call successors, (72), 12 states have call predecessors, (72), 11 states have return successors, (71), 65 states have call predecessors, (71), 71 states have call successors, (71) [2022-07-21 03:31:11,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 465 transitions. [2022-07-21 03:31:11,510 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 465 transitions. Word has length 87 [2022-07-21 03:31:11,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:31:11,511 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 465 transitions. [2022-07-21 03:31:11,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-21 03:31:11,512 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 465 transitions. [2022-07-21 03:31:11,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-21 03:31:11,514 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:31:11,514 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:31:11,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 03:31:11,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-21 03:31:11,731 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:31:11,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:31:11,732 INFO L85 PathProgramCache]: Analyzing trace with hash -134976430, now seen corresponding path program 2 times [2022-07-21 03:31:11,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:31:11,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888771136] [2022-07-21 03:31:11,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:11,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:31:11,740 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:31:11,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041759585] [2022-07-21 03:31:11,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 03:31:11,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:11,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:31:11,747 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:31:11,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 03:31:11,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 03:31:11,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:31:11,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 03:31:11,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:31:11,941 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 03:31:11,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:31:12,118 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-07-21 03:31:12,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:31:12,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888771136] [2022-07-21 03:31:12,118 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:31:12,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041759585] [2022-07-21 03:31:12,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041759585] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:31:12,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:31:12,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2022-07-21 03:31:12,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682580966] [2022-07-21 03:31:12,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:31:12,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 03:31:12,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:31:12,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 03:31:12,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-07-21 03:31:12,120 INFO L87 Difference]: Start difference. First operand 338 states and 465 transitions. Second operand has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) [2022-07-21 03:31:12,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:31:12,693 INFO L93 Difference]: Finished difference Result 981 states and 1419 transitions. [2022-07-21 03:31:12,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 03:31:12,694 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) Word has length 87 [2022-07-21 03:31:12,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:31:12,698 INFO L225 Difference]: With dead ends: 981 [2022-07-21 03:31:12,698 INFO L226 Difference]: Without dead ends: 838 [2022-07-21 03:31:12,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=403, Invalid=719, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 03:31:12,699 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 414 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 03:31:12,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 424 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 03:31:12,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-07-21 03:31:12,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 789. [2022-07-21 03:31:12,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 596 states have (on average 1.2684563758389262) internal successors, (756), 605 states have internal predecessors, (756), 175 states have call successors, (175), 18 states have call predecessors, (175), 17 states have return successors, (174), 165 states have call predecessors, (174), 174 states have call successors, (174) [2022-07-21 03:31:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1105 transitions. [2022-07-21 03:31:12,814 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1105 transitions. Word has length 87 [2022-07-21 03:31:12,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:31:12,815 INFO L495 AbstractCegarLoop]: Abstraction has 789 states and 1105 transitions. [2022-07-21 03:31:12,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) [2022-07-21 03:31:12,815 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1105 transitions. [2022-07-21 03:31:12,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-21 03:31:12,821 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:31:12,821 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:31:12,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 03:31:13,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-21 03:31:13,048 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:31:13,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:31:13,048 INFO L85 PathProgramCache]: Analyzing trace with hash 2132027339, now seen corresponding path program 1 times [2022-07-21 03:31:13,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:31:13,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568659765] [2022-07-21 03:31:13,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:13,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:31:13,054 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:31:13,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1448058243] [2022-07-21 03:31:13,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:13,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:13,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:31:13,056 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:31:13,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 03:31:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:31:13,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-21 03:31:13,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:31:13,262 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:31:13,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:31:13,456 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-07-21 03:31:13,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:31:13,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568659765] [2022-07-21 03:31:13,456 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:31:13,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448058243] [2022-07-21 03:31:13,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448058243] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:31:13,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:31:13,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2022-07-21 03:31:13,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019212980] [2022-07-21 03:31:13,458 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:31:13,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 03:31:13,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:31:13,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 03:31:13,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-07-21 03:31:13,460 INFO L87 Difference]: Start difference. First operand 789 states and 1105 transitions. Second operand has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-21 03:31:14,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:31:14,106 INFO L93 Difference]: Finished difference Result 1281 states and 1795 transitions. [2022-07-21 03:31:14,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-21 03:31:14,106 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 93 [2022-07-21 03:31:14,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:31:14,110 INFO L225 Difference]: With dead ends: 1281 [2022-07-21 03:31:14,110 INFO L226 Difference]: Without dead ends: 791 [2022-07-21 03:31:14,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=1056, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 03:31:14,113 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 405 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 03:31:14,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 442 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 03:31:14,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-07-21 03:31:14,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 736. [2022-07-21 03:31:14,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 552 states have (on average 1.2210144927536233) internal successors, (674), 556 states have internal predecessors, (674), 162 states have call successors, (162), 22 states have call predecessors, (162), 21 states have return successors, (161), 157 states have call predecessors, (161), 161 states have call successors, (161) [2022-07-21 03:31:14,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 997 transitions. [2022-07-21 03:31:14,199 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 997 transitions. Word has length 93 [2022-07-21 03:31:14,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:31:14,200 INFO L495 AbstractCegarLoop]: Abstraction has 736 states and 997 transitions. [2022-07-21 03:31:14,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-21 03:31:14,200 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 997 transitions. [2022-07-21 03:31:14,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-21 03:31:14,203 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:31:14,203 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:31:14,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 03:31:14,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 03:31:14,419 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:31:14,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:31:14,420 INFO L85 PathProgramCache]: Analyzing trace with hash 519126930, now seen corresponding path program 1 times [2022-07-21 03:31:14,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:31:14,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912597247] [2022-07-21 03:31:14,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:14,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:31:14,431 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:31:14,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778040642] [2022-07-21 03:31:14,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:14,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:14,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:31:14,434 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:31:14,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 03:31:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:31:14,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 03:31:14,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:31:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:31:14,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:31:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-07-21 03:31:14,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:31:14,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912597247] [2022-07-21 03:31:14,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:31:14,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778040642] [2022-07-21 03:31:14,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778040642] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:31:14,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:31:14,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2022-07-21 03:31:14,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484501064] [2022-07-21 03:31:14,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:31:14,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 03:31:14,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:31:14,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 03:31:14,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-07-21 03:31:14,916 INFO L87 Difference]: Start difference. First operand 736 states and 997 transitions. Second operand has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-07-21 03:31:15,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:31:15,709 INFO L93 Difference]: Finished difference Result 846 states and 1157 transitions. [2022-07-21 03:31:15,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-21 03:31:15,709 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 99 [2022-07-21 03:31:15,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:31:15,713 INFO L225 Difference]: With dead ends: 846 [2022-07-21 03:31:15,713 INFO L226 Difference]: Without dead ends: 841 [2022-07-21 03:31:15,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=670, Invalid=1222, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 03:31:15,714 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 627 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 03:31:15,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 429 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 03:31:15,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-07-21 03:31:15,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 826. [2022-07-21 03:31:15,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 620 states have (on average 1.2) internal successors, (744), 626 states have internal predecessors, (744), 182 states have call successors, (182), 24 states have call predecessors, (182), 23 states have return successors, (181), 175 states have call predecessors, (181), 181 states have call successors, (181) [2022-07-21 03:31:15,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1107 transitions. [2022-07-21 03:31:15,802 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1107 transitions. Word has length 99 [2022-07-21 03:31:15,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:31:15,803 INFO L495 AbstractCegarLoop]: Abstraction has 826 states and 1107 transitions. [2022-07-21 03:31:15,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-07-21 03:31:15,803 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1107 transitions. [2022-07-21 03:31:15,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-07-21 03:31:15,807 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:31:15,807 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 9, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:31:15,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 03:31:16,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:16,015 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:31:16,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:31:16,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1985812011, now seen corresponding path program 3 times [2022-07-21 03:31:16,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:31:16,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551513162] [2022-07-21 03:31:16,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:16,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:31:16,036 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:31:16,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724912805] [2022-07-21 03:31:16,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 03:31:16,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:16,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:31:16,040 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:31:16,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 03:31:16,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 03:31:16,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:31:16,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 03:31:16,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:31:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 263 proven. 0 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2022-07-21 03:31:16,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:31:16,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:31:16,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551513162] [2022-07-21 03:31:16,126 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:31:16,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724912805] [2022-07-21 03:31:16,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724912805] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:31:16,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:31:16,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 03:31:16,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843494766] [2022-07-21 03:31:16,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:31:16,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 03:31:16,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:31:16,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 03:31:16,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 03:31:16,128 INFO L87 Difference]: Start difference. First operand 826 states and 1107 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-21 03:31:16,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:31:16,238 INFO L93 Difference]: Finished difference Result 1099 states and 1478 transitions. [2022-07-21 03:31:16,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 03:31:16,239 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 177 [2022-07-21 03:31:16,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:31:16,244 INFO L225 Difference]: With dead ends: 1099 [2022-07-21 03:31:16,244 INFO L226 Difference]: Without dead ends: 892 [2022-07-21 03:31:16,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-21 03:31:16,246 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:31:16,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 142 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:31:16,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2022-07-21 03:31:16,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 857. [2022-07-21 03:31:16,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 644 states have (on average 1.1770186335403727) internal successors, (758), 651 states have internal predecessors, (758), 184 states have call successors, (184), 29 states have call predecessors, (184), 28 states have return successors, (183), 176 states have call predecessors, (183), 183 states have call successors, (183) [2022-07-21 03:31:16,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1125 transitions. [2022-07-21 03:31:16,331 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1125 transitions. Word has length 177 [2022-07-21 03:31:16,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:31:16,331 INFO L495 AbstractCegarLoop]: Abstraction has 857 states and 1125 transitions. [2022-07-21 03:31:16,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-21 03:31:16,332 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1125 transitions. [2022-07-21 03:31:16,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-21 03:31:16,336 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:31:16,336 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 9, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:31:16,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 03:31:16,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-21 03:31:16,555 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:31:16,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:31:16,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1858915778, now seen corresponding path program 4 times [2022-07-21 03:31:16,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:31:16,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109181832] [2022-07-21 03:31:16,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:16,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:31:16,565 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:31:16,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717898058] [2022-07-21 03:31:16,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 03:31:16,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:16,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:31:16,568 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:31:16,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 03:31:16,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 03:31:16,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:31:16,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 03:31:16,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:31:16,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 604 proven. 0 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2022-07-21 03:31:16,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:31:16,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:31:16,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109181832] [2022-07-21 03:31:16,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:31:16,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717898058] [2022-07-21 03:31:16,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717898058] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:31:16,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:31:16,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 03:31:16,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480465974] [2022-07-21 03:31:16,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:31:16,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 03:31:16,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:31:16,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 03:31:16,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 03:31:16,684 INFO L87 Difference]: Start difference. First operand 857 states and 1125 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-21 03:31:16,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:31:16,791 INFO L93 Difference]: Finished difference Result 1458 states and 1913 transitions. [2022-07-21 03:31:16,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 03:31:16,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 183 [2022-07-21 03:31:16,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:31:16,796 INFO L225 Difference]: With dead ends: 1458 [2022-07-21 03:31:16,796 INFO L226 Difference]: Without dead ends: 915 [2022-07-21 03:31:16,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 03:31:16,799 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 3 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:31:16,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 74 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:31:16,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-07-21 03:31:16,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 863. [2022-07-21 03:31:16,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 650 states have (on average 1.1753846153846155) internal successors, (764), 659 states have internal predecessors, (764), 184 states have call successors, (184), 29 states have call predecessors, (184), 28 states have return successors, (183), 174 states have call predecessors, (183), 183 states have call successors, (183) [2022-07-21 03:31:16,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1131 transitions. [2022-07-21 03:31:16,882 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1131 transitions. Word has length 183 [2022-07-21 03:31:16,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:31:16,883 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 1131 transitions. [2022-07-21 03:31:16,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-21 03:31:16,883 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1131 transitions. [2022-07-21 03:31:16,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-21 03:31:16,887 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:31:16,887 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 10, 9, 9, 9, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:31:16,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 03:31:17,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-21 03:31:17,112 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:31:17,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:31:17,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1116662802, now seen corresponding path program 5 times [2022-07-21 03:31:17,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:31:17,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353694520] [2022-07-21 03:31:17,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:17,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:31:17,125 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:31:17,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573473358] [2022-07-21 03:31:17,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 03:31:17,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:17,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:31:17,127 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:31:17,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 03:31:17,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-21 03:31:17,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:31:17,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 03:31:17,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:31:17,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 753 trivial. 0 not checked. [2022-07-21 03:31:17,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:31:17,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:31:17,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353694520] [2022-07-21 03:31:17,360 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:31:17,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573473358] [2022-07-21 03:31:17,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573473358] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:31:17,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:31:17,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 03:31:17,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201050329] [2022-07-21 03:31:17,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:31:17,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:31:17,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:31:17,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:31:17,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 03:31:17,362 INFO L87 Difference]: Start difference. First operand 863 states and 1131 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 03:31:17,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:31:17,452 INFO L93 Difference]: Finished difference Result 883 states and 1150 transitions. [2022-07-21 03:31:17,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 03:31:17,452 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 183 [2022-07-21 03:31:17,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:31:17,456 INFO L225 Difference]: With dead ends: 883 [2022-07-21 03:31:17,457 INFO L226 Difference]: Without dead ends: 827 [2022-07-21 03:31:17,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 03:31:17,458 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 5 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:31:17,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 125 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:31:17,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-07-21 03:31:17,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 802. [2022-07-21 03:31:17,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 603 states have (on average 1.1691542288557213) internal successors, (705), 611 states have internal predecessors, (705), 175 states have call successors, (175), 24 states have call predecessors, (175), 23 states have return successors, (174), 166 states have call predecessors, (174), 174 states have call successors, (174) [2022-07-21 03:31:17,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 1054 transitions. [2022-07-21 03:31:17,542 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 1054 transitions. Word has length 183 [2022-07-21 03:31:17,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:31:17,542 INFO L495 AbstractCegarLoop]: Abstraction has 802 states and 1054 transitions. [2022-07-21 03:31:17,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 03:31:17,543 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 1054 transitions. [2022-07-21 03:31:17,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-21 03:31:17,546 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:31:17,546 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 9, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:31:17,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 03:31:17,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 03:31:17,756 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:31:17,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:31:17,756 INFO L85 PathProgramCache]: Analyzing trace with hash -670817854, now seen corresponding path program 6 times [2022-07-21 03:31:17,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:31:17,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162849555] [2022-07-21 03:31:17,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:17,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:31:17,772 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:31:17,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031641063] [2022-07-21 03:31:17,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 03:31:17,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:17,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:31:17,773 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:31:17,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 03:31:17,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-21 03:31:17,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:31:17,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 03:31:17,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:31:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2022-07-21 03:31:17,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:31:17,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:31:17,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162849555] [2022-07-21 03:31:17,909 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:31:17,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031641063] [2022-07-21 03:31:17,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031641063] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:31:17,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:31:17,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 03:31:17,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106861122] [2022-07-21 03:31:17,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:31:17,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 03:31:17,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:31:17,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 03:31:17,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 03:31:17,911 INFO L87 Difference]: Start difference. First operand 802 states and 1054 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-21 03:31:17,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:31:17,999 INFO L93 Difference]: Finished difference Result 849 states and 1103 transitions. [2022-07-21 03:31:17,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 03:31:17,999 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 183 [2022-07-21 03:31:17,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:31:18,003 INFO L225 Difference]: With dead ends: 849 [2022-07-21 03:31:18,003 INFO L226 Difference]: Without dead ends: 778 [2022-07-21 03:31:18,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 03:31:18,004 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 12 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:31:18,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 87 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:31:18,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-07-21 03:31:18,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 751. [2022-07-21 03:31:18,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 565 states have (on average 1.1628318584070796) internal successors, (657), 572 states have internal predecessors, (657), 162 states have call successors, (162), 24 states have call predecessors, (162), 23 states have return successors, (161), 154 states have call predecessors, (161), 161 states have call successors, (161) [2022-07-21 03:31:18,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 980 transitions. [2022-07-21 03:31:18,082 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 980 transitions. Word has length 183 [2022-07-21 03:31:18,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:31:18,082 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 980 transitions. [2022-07-21 03:31:18,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-21 03:31:18,082 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 980 transitions. [2022-07-21 03:31:18,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-21 03:31:18,085 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:31:18,085 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:31:18,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-21 03:31:18,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 03:31:18,291 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:31:18,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:31:18,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1332064508, now seen corresponding path program 7 times [2022-07-21 03:31:18,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:31:18,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106027370] [2022-07-21 03:31:18,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:18,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:31:18,305 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:31:18,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1936795167] [2022-07-21 03:31:18,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 03:31:18,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:18,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:31:18,306 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:31:18,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 03:31:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:31:18,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 03:31:18,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:31:18,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 280 proven. 184 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2022-07-21 03:31:18,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:31:18,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 140 proven. 184 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-07-21 03:31:18,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:31:18,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106027370] [2022-07-21 03:31:18,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:31:18,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936795167] [2022-07-21 03:31:18,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936795167] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:31:18,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:31:18,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2022-07-21 03:31:18,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684748535] [2022-07-21 03:31:18,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:31:18,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 03:31:18,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:31:18,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 03:31:18,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-21 03:31:18,721 INFO L87 Difference]: Start difference. First operand 751 states and 980 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 10 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 10 states have call predecessors, (21), 10 states have call successors, (21) [2022-07-21 03:31:19,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:31:19,523 INFO L93 Difference]: Finished difference Result 1716 states and 2271 transitions. [2022-07-21 03:31:19,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 03:31:19,523 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 10 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 10 states have call predecessors, (21), 10 states have call successors, (21) Word has length 183 [2022-07-21 03:31:19,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:31:19,530 INFO L225 Difference]: With dead ends: 1716 [2022-07-21 03:31:19,530 INFO L226 Difference]: Without dead ends: 1519 [2022-07-21 03:31:19,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 354 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-07-21 03:31:19,532 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 137 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 03:31:19,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 888 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 03:31:19,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2022-07-21 03:31:19,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1310. [2022-07-21 03:31:19,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 985 states have (on average 1.1796954314720811) internal successors, (1162), 1001 states have internal predecessors, (1162), 301 states have call successors, (301), 24 states have call predecessors, (301), 23 states have return successors, (300), 284 states have call predecessors, (300), 300 states have call successors, (300) [2022-07-21 03:31:19,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1763 transitions. [2022-07-21 03:31:19,681 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1763 transitions. Word has length 183 [2022-07-21 03:31:19,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:31:19,681 INFO L495 AbstractCegarLoop]: Abstraction has 1310 states and 1763 transitions. [2022-07-21 03:31:19,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 10 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 10 states have call predecessors, (21), 10 states have call successors, (21) [2022-07-21 03:31:19,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1763 transitions. [2022-07-21 03:31:19,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-21 03:31:19,688 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:31:19,688 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 10, 9, 9, 9, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:31:19,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 03:31:19,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:19,889 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:31:19,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:31:19,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1762868398, now seen corresponding path program 8 times [2022-07-21 03:31:19,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:31:19,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717725326] [2022-07-21 03:31:19,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:19,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:31:19,899 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:31:19,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313655089] [2022-07-21 03:31:19,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 03:31:19,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:19,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:31:19,901 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:31:19,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 03:31:19,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 03:31:19,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:31:19,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 03:31:19,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:31:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 516 proven. 84 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-07-21 03:31:20,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:31:20,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 226 proven. 84 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2022-07-21 03:31:20,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:31:20,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717725326] [2022-07-21 03:31:20,364 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:31:20,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313655089] [2022-07-21 03:31:20,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313655089] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:31:20,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:31:20,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-21 03:31:20,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132754158] [2022-07-21 03:31:20,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:31:20,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 03:31:20,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:31:20,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 03:31:20,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-07-21 03:31:20,366 INFO L87 Difference]: Start difference. First operand 1310 states and 1763 transitions. Second operand has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2022-07-21 03:31:21,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:31:21,553 INFO L93 Difference]: Finished difference Result 2710 states and 3671 transitions. [2022-07-21 03:31:21,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 03:31:21,553 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) Word has length 183 [2022-07-21 03:31:21,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:31:21,562 INFO L225 Difference]: With dead ends: 2710 [2022-07-21 03:31:21,563 INFO L226 Difference]: Without dead ends: 2413 [2022-07-21 03:31:21,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=385, Invalid=1097, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 03:31:21,564 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 174 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 03:31:21,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 678 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 03:31:21,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2022-07-21 03:31:21,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 1964. [2022-07-21 03:31:21,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1474 states have (on average 1.162822252374491) internal successors, (1714), 1502 states have internal predecessors, (1714), 466 states have call successors, (466), 24 states have call predecessors, (466), 23 states have return successors, (465), 437 states have call predecessors, (465), 465 states have call successors, (465) [2022-07-21 03:31:21,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 2645 transitions. [2022-07-21 03:31:21,830 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 2645 transitions. Word has length 183 [2022-07-21 03:31:21,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:31:21,831 INFO L495 AbstractCegarLoop]: Abstraction has 1964 states and 2645 transitions. [2022-07-21 03:31:21,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2022-07-21 03:31:21,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 2645 transitions. [2022-07-21 03:31:21,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-21 03:31:21,838 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:31:21,838 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:31:21,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-21 03:31:22,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:22,061 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:31:22,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:31:22,061 INFO L85 PathProgramCache]: Analyzing trace with hash 144972548, now seen corresponding path program 9 times [2022-07-21 03:31:22,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:31:22,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737518852] [2022-07-21 03:31:22,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:22,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:31:22,069 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:31:22,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572702224] [2022-07-21 03:31:22,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 03:31:22,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:22,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:31:22,071 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:31:22,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 03:31:22,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-21 03:31:22,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:31:22,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 03:31:22,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:31:22,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 80 proven. 252 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-07-21 03:31:22,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:31:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 80 proven. 252 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-07-21 03:31:23,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:31:23,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737518852] [2022-07-21 03:31:23,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:31:23,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572702224] [2022-07-21 03:31:23,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572702224] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:31:23,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:31:23,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-07-21 03:31:23,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485816360] [2022-07-21 03:31:23,055 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:31:23,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 03:31:23,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:31:23,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 03:31:23,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-07-21 03:31:23,057 INFO L87 Difference]: Start difference. First operand 1964 states and 2645 transitions. Second operand has 20 states, 20 states have (on average 6.25) internal successors, (125), 20 states have internal predecessors, (125), 20 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 19 states have call predecessors, (36), 19 states have call successors, (36) [2022-07-21 03:31:27,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:31:27,501 INFO L93 Difference]: Finished difference Result 5447 states and 7433 transitions. [2022-07-21 03:31:27,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-21 03:31:27,501 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.25) internal successors, (125), 20 states have internal predecessors, (125), 20 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 19 states have call predecessors, (36), 19 states have call successors, (36) Word has length 183 [2022-07-21 03:31:27,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:31:27,520 INFO L225 Difference]: With dead ends: 5447 [2022-07-21 03:31:27,521 INFO L226 Difference]: Without dead ends: 5174 [2022-07-21 03:31:27,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2757 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1198, Invalid=7922, Unknown=0, NotChecked=0, Total=9120 [2022-07-21 03:31:27,526 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 462 mSDsluCounter, 2572 mSDsCounter, 0 mSdLazyCounter, 3960 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 3001 SdHoareTripleChecker+Invalid, 4252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 3960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-21 03:31:27,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 3001 Invalid, 4252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 3960 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-21 03:31:27,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5174 states. [2022-07-21 03:31:28,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5174 to 4213. [2022-07-21 03:31:28,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4213 states, 3162 states have (on average 1.1932321315623022) internal successors, (3773), 3239 states have internal predecessors, (3773), 1027 states have call successors, (1027), 24 states have call predecessors, (1027), 23 states have return successors, (1026), 949 states have call predecessors, (1026), 1026 states have call successors, (1026) [2022-07-21 03:31:28,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 5826 transitions. [2022-07-21 03:31:28,219 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 5826 transitions. Word has length 183 [2022-07-21 03:31:28,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:31:28,220 INFO L495 AbstractCegarLoop]: Abstraction has 4213 states and 5826 transitions. [2022-07-21 03:31:28,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.25) internal successors, (125), 20 states have internal predecessors, (125), 20 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 19 states have call predecessors, (36), 19 states have call successors, (36) [2022-07-21 03:31:28,220 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 5826 transitions. [2022-07-21 03:31:28,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-21 03:31:28,235 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:31:28,235 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:31:28,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-21 03:31:28,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:28,442 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:31:28,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:31:28,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1027204868, now seen corresponding path program 10 times [2022-07-21 03:31:28,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:31:28,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309482727] [2022-07-21 03:31:28,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:28,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:31:28,450 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:31:28,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124369882] [2022-07-21 03:31:28,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 03:31:28,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:28,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:31:28,452 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:31:28,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-21 03:31:28,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 03:31:28,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:31:28,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-21 03:31:28,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:31:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 60 proven. 1044 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:31:28,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:31:29,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 60 proven. 284 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2022-07-21 03:31:29,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:31:29,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309482727] [2022-07-21 03:31:29,597 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:31:29,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124369882] [2022-07-21 03:31:29,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124369882] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:31:29,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:31:29,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 46 [2022-07-21 03:31:29,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072084354] [2022-07-21 03:31:29,597 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:31:29,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 03:31:29,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:31:29,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 03:31:29,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 03:31:29,599 INFO L87 Difference]: Start difference. First operand 4213 states and 5826 transitions. Second operand has 46 states, 46 states have (on average 4.478260869565218) internal successors, (206), 46 states have internal predecessors, (206), 43 states have call successors, (45), 23 states have call predecessors, (45), 22 states have return successors, (44), 42 states have call predecessors, (44), 42 states have call successors, (44) [2022-07-21 03:31:33,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:31:33,961 INFO L93 Difference]: Finished difference Result 18228 states and 27953 transitions. [2022-07-21 03:31:33,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-21 03:31:33,963 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.478260869565218) internal successors, (206), 46 states have internal predecessors, (206), 43 states have call successors, (45), 23 states have call predecessors, (45), 22 states have return successors, (44), 42 states have call predecessors, (44), 42 states have call successors, (44) Word has length 183 [2022-07-21 03:31:33,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:31:34,037 INFO L225 Difference]: With dead ends: 18228 [2022-07-21 03:31:34,037 INFO L226 Difference]: Without dead ends: 18219 [2022-07-21 03:31:34,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2691, Invalid=4619, Unknown=0, NotChecked=0, Total=7310 [2022-07-21 03:31:34,047 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 1319 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 937 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1319 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 1621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 937 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 03:31:34,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1319 Valid, 880 Invalid, 1621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [937 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-21 03:31:34,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18219 states. [2022-07-21 03:31:36,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18219 to 17884. [2022-07-21 03:31:36,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17884 states, 13435 states have (on average 1.2844064011909193) internal successors, (17256), 13533 states have internal predecessors, (17256), 4405 states have call successors, (4405), 44 states have call predecessors, (4405), 43 states have return successors, (4404), 4306 states have call predecessors, (4404), 4404 states have call successors, (4404) [2022-07-21 03:31:36,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17884 states to 17884 states and 26065 transitions. [2022-07-21 03:31:36,562 INFO L78 Accepts]: Start accepts. Automaton has 17884 states and 26065 transitions. Word has length 183 [2022-07-21 03:31:36,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:31:36,563 INFO L495 AbstractCegarLoop]: Abstraction has 17884 states and 26065 transitions. [2022-07-21 03:31:36,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.478260869565218) internal successors, (206), 46 states have internal predecessors, (206), 43 states have call successors, (45), 23 states have call predecessors, (45), 22 states have return successors, (44), 42 states have call predecessors, (44), 42 states have call successors, (44) [2022-07-21 03:31:36,563 INFO L276 IsEmpty]: Start isEmpty. Operand 17884 states and 26065 transitions. [2022-07-21 03:31:36,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-07-21 03:31:36,579 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:31:36,580 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 10, 10, 10, 10, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:31:36,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-21 03:31:36,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:36,804 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:31:36,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:31:36,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1981009717, now seen corresponding path program 2 times [2022-07-21 03:31:36,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:31:36,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623203747] [2022-07-21 03:31:36,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:36,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:31:36,815 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:31:36,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328004981] [2022-07-21 03:31:36,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 03:31:36,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:36,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:31:36,817 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:31:36,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-21 03:31:36,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 03:31:36,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:31:36,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-21 03:31:36,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:31:37,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 1142 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:31:37,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:31:37,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 302 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-07-21 03:31:37,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:31:37,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623203747] [2022-07-21 03:31:37,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:31:37,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328004981] [2022-07-21 03:31:37,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328004981] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:31:37,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:31:37,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 48 [2022-07-21 03:31:37,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085737153] [2022-07-21 03:31:37,841 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:31:37,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-21 03:31:37,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:31:37,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-21 03:31:37,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-07-21 03:31:37,844 INFO L87 Difference]: Start difference. First operand 17884 states and 26065 transitions. Second operand has 48 states, 48 states have (on average 4.4375) internal successors, (213), 48 states have internal predecessors, (213), 45 states have call successors, (47), 24 states have call predecessors, (47), 23 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) [2022-07-21 03:31:41,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:31:41,330 INFO L93 Difference]: Finished difference Result 26787 states and 39519 transitions. [2022-07-21 03:31:41,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-07-21 03:31:41,331 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.4375) internal successors, (213), 48 states have internal predecessors, (213), 45 states have call successors, (47), 24 states have call predecessors, (47), 23 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) Word has length 189 [2022-07-21 03:31:41,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:31:41,370 INFO L225 Difference]: With dead ends: 26787 [2022-07-21 03:31:41,370 INFO L226 Difference]: Without dead ends: 13373 [2022-07-21 03:31:41,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2864, Invalid=4968, Unknown=0, NotChecked=0, Total=7832 [2022-07-21 03:31:41,414 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 1637 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 1012 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1637 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1012 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 03:31:41,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1637 Valid, 991 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1012 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-21 03:31:41,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13373 states. [2022-07-21 03:31:43,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13373 to 13105. [2022-07-21 03:31:43,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13105 states, 9833 states have (on average 1.2012610596969389) internal successors, (11812), 9890 states have internal predecessors, (11812), 3226 states have call successors, (3226), 46 states have call predecessors, (3226), 45 states have return successors, (3225), 3168 states have call predecessors, (3225), 3225 states have call successors, (3225) [2022-07-21 03:31:43,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13105 states to 13105 states and 18263 transitions. [2022-07-21 03:31:43,141 INFO L78 Accepts]: Start accepts. Automaton has 13105 states and 18263 transitions. Word has length 189 [2022-07-21 03:31:43,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:31:43,142 INFO L495 AbstractCegarLoop]: Abstraction has 13105 states and 18263 transitions. [2022-07-21 03:31:43,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.4375) internal successors, (213), 48 states have internal predecessors, (213), 45 states have call successors, (47), 24 states have call predecessors, (47), 23 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) [2022-07-21 03:31:43,142 INFO L276 IsEmpty]: Start isEmpty. Operand 13105 states and 18263 transitions. [2022-07-21 03:31:43,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-07-21 03:31:43,157 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:31:43,157 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 10, 10, 10, 10, 8, 8, 8, 8, 6, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:31:43,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-21 03:31:43,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:43,382 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:31:43,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:31:43,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1075935086, now seen corresponding path program 2 times [2022-07-21 03:31:43,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:31:43,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791189775] [2022-07-21 03:31:43,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:43,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:31:43,392 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:31:43,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821709152] [2022-07-21 03:31:43,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 03:31:43,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:43,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:31:43,393 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:31:43,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-21 03:31:43,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 03:31:43,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:31:43,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-21 03:31:43,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:31:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 1248 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 03:31:43,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:31:44,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 324 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-07-21 03:31:44,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:31:44,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791189775] [2022-07-21 03:31:44,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:31:44,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821709152] [2022-07-21 03:31:44,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821709152] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:31:44,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:31:44,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2022-07-21 03:31:44,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191753819] [2022-07-21 03:31:44,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:31:44,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-21 03:31:44,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:31:44,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-21 03:31:44,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-07-21 03:31:44,622 INFO L87 Difference]: Start difference. First operand 13105 states and 18263 transitions. Second operand has 50 states, 50 states have (on average 4.4) internal successors, (220), 50 states have internal predecessors, (220), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) [2022-07-21 03:31:48,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:31:48,520 INFO L93 Difference]: Finished difference Result 14122 states and 19800 transitions. [2022-07-21 03:31:48,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-07-21 03:31:48,521 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.4) internal successors, (220), 50 states have internal predecessors, (220), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) Word has length 195 [2022-07-21 03:31:48,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:31:48,557 INFO L225 Difference]: With dead ends: 14122 [2022-07-21 03:31:48,557 INFO L226 Difference]: Without dead ends: 13973 [2022-07-21 03:31:48,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3046, Invalid=5326, Unknown=0, NotChecked=0, Total=8372 [2022-07-21 03:31:48,567 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 1516 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 1176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 2066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1176 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:31:48,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1516 Valid, 964 Invalid, 2066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1176 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-21 03:31:48,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13973 states. [2022-07-21 03:31:50,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13973 to 13195. [2022-07-21 03:31:50,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13195 states, 9898 states have (on average 1.1371994342291372) internal successors, (11256), 9977 states have internal predecessors, (11256), 3249 states have call successors, (3249), 48 states have call predecessors, (3249), 47 states have return successors, (3248), 3169 states have call predecessors, (3248), 3248 states have call successors, (3248) [2022-07-21 03:31:50,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13195 states to 13195 states and 17753 transitions. [2022-07-21 03:31:50,212 INFO L78 Accepts]: Start accepts. Automaton has 13195 states and 17753 transitions. Word has length 195 [2022-07-21 03:31:50,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:31:50,212 INFO L495 AbstractCegarLoop]: Abstraction has 13195 states and 17753 transitions. [2022-07-21 03:31:50,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.4) internal successors, (220), 50 states have internal predecessors, (220), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) [2022-07-21 03:31:50,213 INFO L276 IsEmpty]: Start isEmpty. Operand 13195 states and 17753 transitions. [2022-07-21 03:31:50,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-07-21 03:31:50,268 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:31:50,268 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 20, 19, 19, 19, 17, 16, 16, 16, 11, 10, 9, 9, 9, 9, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:31:50,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-21 03:31:50,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:50,483 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:31:50,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:31:50,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1339328528, now seen corresponding path program 11 times [2022-07-21 03:31:50,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:31:50,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811732615] [2022-07-21 03:31:50,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:50,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:31:50,499 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:31:50,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026542690] [2022-07-21 03:31:50,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 03:31:50,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:50,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:31:50,501 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:31:50,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-21 03:31:50,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-07-21 03:31:50,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:31:50,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-21 03:31:50,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:32:44,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5272 backedges. 480 proven. 852 refuted. 140 times theorem prover too weak. 3800 trivial. 0 not checked. [2022-07-21 03:32:44,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:33:17,239 WARN L233 SmtUtils]: Spent 30.16s on a formula simplification. DAG size of input: 6425 DAG size of output: 6391 (called from [L 927] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)