./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_init_nondet_vars.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/array-cav19/array_init_nondet_vars.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 b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 21:52:25,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 21:52:25,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 21:52:25,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 21:52:25,631 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 21:52:25,632 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 21:52:25,636 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 21:52:25,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 21:52:25,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 21:52:25,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 21:52:25,648 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 21:52:25,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 21:52:25,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 21:52:25,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 21:52:25,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 21:52:25,655 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 21:52:25,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 21:52:25,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 21:52:25,660 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 21:52:25,666 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 21:52:25,668 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 21:52:25,669 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 21:52:25,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 21:52:25,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 21:52:25,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 21:52:25,673 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 21:52:25,674 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 21:52:25,674 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 21:52:25,675 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 21:52:25,676 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 21:52:25,676 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 21:52:25,677 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 21:52:25,678 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 21:52:25,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 21:52:25,679 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 21:52:25,679 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 21:52:25,680 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 21:52:25,680 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 21:52:25,680 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 21:52:25,680 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 21:52:25,681 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 21:52:25,682 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 21:52:25,683 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 21:52:25,712 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 21:52:25,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 21:52:25,713 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 21:52:25,713 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 21:52:25,714 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 21:52:25,714 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 21:52:25,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 21:52:25,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 21:52:25,715 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 21:52:25,716 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 21:52:25,716 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 21:52:25,716 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 21:52:25,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 21:52:25,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 21:52:25,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 21:52:25,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 21:52:25,717 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 21:52:25,717 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 21:52:25,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 21:52:25,717 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 21:52:25,718 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 21:52:25,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 21:52:25,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 21:52:25,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 21:52:25,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:52:25,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 21:52:25,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 21:52:25,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 21:52:25,719 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 21:52:25,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 21:52:25,720 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 21:52:25,720 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 21:52:25,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 21:52:25,720 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f [2022-07-20 21:52:25,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 21:52:25,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 21:52:25,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 21:52:25,943 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 21:52:25,943 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 21:52:25,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2022-07-20 21:52:25,995 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1778fc2ba/8beeac8e6433486cb21affa951026773/FLAGf977f8d28 [2022-07-20 21:52:26,358 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 21:52:26,358 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2022-07-20 21:52:26,364 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1778fc2ba/8beeac8e6433486cb21affa951026773/FLAGf977f8d28 [2022-07-20 21:52:26,377 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1778fc2ba/8beeac8e6433486cb21affa951026773 [2022-07-20 21:52:26,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 21:52:26,381 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 21:52:26,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 21:52:26,382 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 21:52:26,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 21:52:26,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:52:26" (1/1) ... [2022-07-20 21:52:26,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@188c307 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:26, skipping insertion in model container [2022-07-20 21:52:26,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:52:26" (1/1) ... [2022-07-20 21:52:26,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 21:52:26,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 21:52:26,530 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c[413,426] [2022-07-20 21:52:26,547 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:52:26,552 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 21:52:26,564 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c[413,426] [2022-07-20 21:52:26,575 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:52:26,588 INFO L208 MainTranslator]: Completed translation [2022-07-20 21:52:26,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:26 WrapperNode [2022-07-20 21:52:26,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 21:52:26,589 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 21:52:26,589 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 21:52:26,589 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 21:52:26,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:26" (1/1) ... [2022-07-20 21:52:26,599 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:26" (1/1) ... [2022-07-20 21:52:26,613 INFO L137 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2022-07-20 21:52:26,614 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 21:52:26,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 21:52:26,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 21:52:26,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 21:52:26,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:26" (1/1) ... [2022-07-20 21:52:26,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:26" (1/1) ... [2022-07-20 21:52:26,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:26" (1/1) ... [2022-07-20 21:52:26,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:26" (1/1) ... [2022-07-20 21:52:26,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:26" (1/1) ... [2022-07-20 21:52:26,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:26" (1/1) ... [2022-07-20 21:52:26,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:26" (1/1) ... [2022-07-20 21:52:26,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 21:52:26,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 21:52:26,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 21:52:26,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 21:52:26,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:26" (1/1) ... [2022-07-20 21:52:26,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:52:26,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:52:26,669 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) [2022-07-20 21:52:26,694 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 [2022-07-20 21:52:26,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 21:52:26,704 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-20 21:52:26,704 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-20 21:52:26,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 21:52:26,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 21:52:26,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 21:52:26,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 21:52:26,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 21:52:26,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 21:52:26,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 21:52:26,753 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 21:52:26,754 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 21:52:26,881 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 21:52:26,885 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 21:52:26,892 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-20 21:52:26,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:52:26 BoogieIcfgContainer [2022-07-20 21:52:26,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 21:52:26,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 21:52:26,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 21:52:26,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 21:52:26,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:52:26" (1/3) ... [2022-07-20 21:52:26,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c3f4cbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:52:26, skipping insertion in model container [2022-07-20 21:52:26,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:26" (2/3) ... [2022-07-20 21:52:26,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c3f4cbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:52:26, skipping insertion in model container [2022-07-20 21:52:26,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:52:26" (3/3) ... [2022-07-20 21:52:26,914 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_nondet_vars.c [2022-07-20 21:52:26,922 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 21:52:26,927 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 21:52:26,984 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 21:52:26,992 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@48cc80bd, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7eab1c3 [2022-07-20 21:52:26,992 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 21:52:26,999 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:52:27,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-20 21:52:27,006 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:52:27,006 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:52:27,007 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:52:27,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:52:27,012 INFO L85 PathProgramCache]: Analyzing trace with hash -687560493, now seen corresponding path program 1 times [2022-07-20 21:52:27,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:52:27,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124306708] [2022-07-20 21:52:27,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:27,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:52:27,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:27,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:52:27,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:27,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:52:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:52:27,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:52:27,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124306708] [2022-07-20 21:52:27,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124306708] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:52:27,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:52:27,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 21:52:27,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206401587] [2022-07-20 21:52:27,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:52:27,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 21:52:27,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:52:27,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 21:52:27,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 21:52:27,188 INFO L87 Difference]: Start difference. First operand has 25 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 21:52:27,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:52:27,203 INFO L93 Difference]: Finished difference Result 47 states and 63 transitions. [2022-07-20 21:52:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 21:52:27,205 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, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-07-20 21:52:27,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:52:27,209 INFO L225 Difference]: With dead ends: 47 [2022-07-20 21:52:27,210 INFO L226 Difference]: Without dead ends: 21 [2022-07-20 21:52:27,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 21:52:27,216 INFO L413 NwaCegarLoop]: 28 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, 28 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 [2022-07-20 21:52:27,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:52:27,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-20 21:52:27,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-20 21:52:27,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:52:27,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-07-20 21:52:27,249 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 19 [2022-07-20 21:52:27,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:52:27,249 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-07-20 21:52:27,250 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, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 21:52:27,250 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-07-20 21:52:27,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-20 21:52:27,252 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:52:27,252 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:52:27,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 21:52:27,253 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:52:27,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:52:27,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1294753969, now seen corresponding path program 1 times [2022-07-20 21:52:27,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:52:27,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800751621] [2022-07-20 21:52:27,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:27,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:52:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:27,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:52:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:27,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:52:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:52:27,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:52:27,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800751621] [2022-07-20 21:52:27,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800751621] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:52:27,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:52:27,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 21:52:27,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406058801] [2022-07-20 21:52:27,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:52:27,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 21:52:27,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:52:27,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 21:52:27,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:52:27,368 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-20 21:52:27,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:52:27,400 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-07-20 21:52:27,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:52:27,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-07-20 21:52:27,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:52:27,402 INFO L225 Difference]: With dead ends: 39 [2022-07-20 21:52:27,402 INFO L226 Difference]: Without dead ends: 31 [2022-07-20 21:52:27,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:52:27,403 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:52:27,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 50 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:52:27,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-20 21:52:27,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2022-07-20 21:52:27,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:52:27,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-07-20 21:52:27,411 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2022-07-20 21:52:27,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:52:27,412 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-07-20 21:52:27,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-20 21:52:27,415 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-07-20 21:52:27,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 21:52:27,416 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:52:27,416 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:52:27,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 21:52:27,416 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:52:27,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:52:27,417 INFO L85 PathProgramCache]: Analyzing trace with hash -554531054, now seen corresponding path program 1 times [2022-07-20 21:52:27,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:52:27,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411369809] [2022-07-20 21:52:27,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:27,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:52:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:27,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:52:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:27,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:52:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:27,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:52:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 21:52:27,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:52:27,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411369809] [2022-07-20 21:52:27,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411369809] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:27,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751164195] [2022-07-20 21:52:27,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:27,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:27,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:52:27,667 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) [2022-07-20 21:52:27,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 21:52:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:27,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-20 21:52:27,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:52:27,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 21:52:27,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:52:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 21:52:27,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:52:27,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:52:27,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:52:28,140 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 21:52:28,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751164195] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:52:28,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:52:28,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-07-20 21:52:28,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254254115] [2022-07-20 21:52:28,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:52:28,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-20 21:52:28,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:52:28,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-20 21:52:28,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-07-20 21:52:28,142 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 21:52:28,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:52:28,395 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-07-20 21:52:28,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 21:52:28,395 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 27 [2022-07-20 21:52:28,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:52:28,397 INFO L225 Difference]: With dead ends: 48 [2022-07-20 21:52:28,397 INFO L226 Difference]: Without dead ends: 46 [2022-07-20 21:52:28,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-07-20 21:52:28,401 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 63 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:52:28,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 149 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:52:28,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-20 21:52:28,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2022-07-20 21:52:28,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 21:52:28,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-07-20 21:52:28,416 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 27 [2022-07-20 21:52:28,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:52:28,417 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-07-20 21:52:28,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-20 21:52:28,417 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-07-20 21:52:28,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-20 21:52:28,419 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:52:28,419 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:52:28,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 21:52:28,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:28,636 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:52:28,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:52:28,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1909003512, now seen corresponding path program 1 times [2022-07-20 21:52:28,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:52:28,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426430318] [2022-07-20 21:52:28,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:28,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:52:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:28,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:52:28,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:28,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:52:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:28,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:52:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:28,724 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 21:52:28,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:52:28,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426430318] [2022-07-20 21:52:28,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426430318] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:28,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5562589] [2022-07-20 21:52:28,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:28,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:28,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:52:28,730 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) [2022-07-20 21:52:28,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 21:52:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:28,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 21:52:28,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:52:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 21:52:28,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:52:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 21:52:28,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5562589] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:52:28,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:52:28,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-20 21:52:28,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637388712] [2022-07-20 21:52:28,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:52:28,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 21:52:28,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:52:28,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 21:52:28,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-20 21:52:28,840 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-20 21:52:28,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:52:28,889 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-07-20 21:52:28,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 21:52:28,890 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2022-07-20 21:52:28,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:52:28,890 INFO L225 Difference]: With dead ends: 53 [2022-07-20 21:52:28,891 INFO L226 Difference]: Without dead ends: 41 [2022-07-20 21:52:28,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-20 21:52:28,892 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:52:28,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 82 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:52:28,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-20 21:52:28,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2022-07-20 21:52:28,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 21:52:28,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-07-20 21:52:28,896 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 31 [2022-07-20 21:52:28,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:52:28,896 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-07-20 21:52:28,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-20 21:52:28,896 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-07-20 21:52:28,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-20 21:52:28,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:52:28,897 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:52:28,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 21:52:29,111 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,SelfDestructingSolverStorable3 [2022-07-20 21:52:29,112 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:52:29,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:52:29,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1118110763, now seen corresponding path program 2 times [2022-07-20 21:52:29,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:52:29,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463673261] [2022-07-20 21:52:29,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:29,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:52:29,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:29,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:52:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:29,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:52:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:29,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:52:29,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:29,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:52:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 21:52:29,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:52:29,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463673261] [2022-07-20 21:52:29,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463673261] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:29,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204646892] [2022-07-20 21:52:29,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:52:29,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:29,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:52:29,346 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) [2022-07-20 21:52:29,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 21:52:29,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:52:29,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:52:29,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-20 21:52:29,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:52:29,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:52:29,636 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:52:29,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:52:29,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:52:29,679 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 21:52:29,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:52:29,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:52:29,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:52:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 21:52:29,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204646892] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:52:29,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:52:29,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-07-20 21:52:29,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104789404] [2022-07-20 21:52:29,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:52:29,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-20 21:52:29,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:52:29,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-20 21:52:29,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-07-20 21:52:29,879 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-20 21:52:30,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:52:30,105 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2022-07-20 21:52:30,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-20 21:52:30,107 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 35 [2022-07-20 21:52:30,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:52:30,109 INFO L225 Difference]: With dead ends: 55 [2022-07-20 21:52:30,109 INFO L226 Difference]: Without dead ends: 53 [2022-07-20 21:52:30,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2022-07-20 21:52:30,111 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 51 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:52:30,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 178 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 248 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-07-20 21:52:30,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-20 21:52:30,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2022-07-20 21:52:30,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 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) [2022-07-20 21:52:30,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2022-07-20 21:52:30,126 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 35 [2022-07-20 21:52:30,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:52:30,126 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2022-07-20 21:52:30,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-20 21:52:30,127 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2022-07-20 21:52:30,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-20 21:52:30,129 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:52:30,130 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:52:30,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 21:52:30,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:30,340 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:52:30,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:52:30,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1711359563, now seen corresponding path program 2 times [2022-07-20 21:52:30,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:52:30,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179785462] [2022-07-20 21:52:30,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:30,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:52:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:30,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:52:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:30,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:52:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:30,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:52:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:30,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:52:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 21:52:30,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:52:30,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179785462] [2022-07-20 21:52:30,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179785462] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:30,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597618155] [2022-07-20 21:52:30,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:52:30,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:30,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:52:30,516 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) [2022-07-20 21:52:30,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 21:52:30,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:52:30,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:52:30,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-20 21:52:30,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:52:30,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:52:30,801 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-20 21:52:30,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-07-20 21:52:30,829 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 21:52:30,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:52:31,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-20 21:52:31,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-07-20 21:52:31,231 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 21:52:31,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597618155] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:52:31,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:52:31,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 32 [2022-07-20 21:52:31,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142537375] [2022-07-20 21:52:31,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:52:31,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-20 21:52:31,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:52:31,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-20 21:52:31,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-07-20 21:52:31,238 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 27 states have internal predecessors, (56), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-20 21:52:31,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:52:31,602 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2022-07-20 21:52:31,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-20 21:52:31,602 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 27 states have internal predecessors, (56), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 39 [2022-07-20 21:52:31,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:52:31,603 INFO L225 Difference]: With dead ends: 54 [2022-07-20 21:52:31,603 INFO L226 Difference]: Without dead ends: 42 [2022-07-20 21:52:31,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=296, Invalid=1774, Unknown=0, NotChecked=0, Total=2070 [2022-07-20 21:52:31,604 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:52:31,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 237 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 185 Invalid, 0 Unknown, 82 Unchecked, 0.1s Time] [2022-07-20 21:52:31,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-20 21:52:31,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-07-20 21:52:31,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 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) [2022-07-20 21:52:31,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-07-20 21:52:31,608 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 39 [2022-07-20 21:52:31,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:52:31,609 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-07-20 21:52:31,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 27 states have internal predecessors, (56), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-20 21:52:31,609 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-07-20 21:52:31,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-20 21:52:31,610 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:52:31,610 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:52:31,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 21:52:31,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:31,810 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:52:31,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:52:31,811 INFO L85 PathProgramCache]: Analyzing trace with hash -181817714, now seen corresponding path program 3 times [2022-07-20 21:52:31,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:52:31,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845856344] [2022-07-20 21:52:31,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:31,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:52:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:31,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:52:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:31,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:52:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:31,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:52:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:31,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:52:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:31,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:52:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-20 21:52:31,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:52:31,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845856344] [2022-07-20 21:52:31,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845856344] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:31,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411848219] [2022-07-20 21:52:31,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:52:31,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:31,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:52:31,974 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) [2022-07-20 21:52:31,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 21:52:32,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-20 21:52:32,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:52:32,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-20 21:52:32,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:52:32,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:52:32,265 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-20 21:52:32,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-20 21:52:32,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:52:32,345 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 21:52:32,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:52:32,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:52:32,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:52:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-20 21:52:32,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411848219] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:52:32,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:52:32,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 24 [2022-07-20 21:52:32,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411060833] [2022-07-20 21:52:32,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:52:32,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-20 21:52:32,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:52:32,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-20 21:52:32,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-07-20 21:52:32,533 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 20 states have internal predecessors, (53), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-20 21:52:32,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:52:32,769 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-07-20 21:52:32,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 21:52:32,770 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 20 states have internal predecessors, (53), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 47 [2022-07-20 21:52:32,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:52:32,770 INFO L225 Difference]: With dead ends: 60 [2022-07-20 21:52:32,771 INFO L226 Difference]: Without dead ends: 58 [2022-07-20 21:52:32,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 85 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2022-07-20 21:52:32,771 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:52:32,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 254 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 256 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-07-20 21:52:32,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-20 21:52:32,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2022-07-20 21:52:32,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 21:52:32,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-07-20 21:52:32,777 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 47 [2022-07-20 21:52:32,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:52:32,778 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-07-20 21:52:32,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 20 states have internal predecessors, (53), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-20 21:52:32,779 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-07-20 21:52:32,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-20 21:52:32,780 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:52:32,780 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:52:32,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 21:52:32,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:32,996 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:52:32,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:52:32,996 INFO L85 PathProgramCache]: Analyzing trace with hash 513051739, now seen corresponding path program 3 times [2022-07-20 21:52:32,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:52:32,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181246204] [2022-07-20 21:52:32,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:32,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:52:33,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:33,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:52:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:33,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:52:33,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:33,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:52:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:33,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:52:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:33,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:52:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:33,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:52:33,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:33,127 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-20 21:52:33,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:52:33,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181246204] [2022-07-20 21:52:33,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181246204] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:33,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422296533] [2022-07-20 21:52:33,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:52:33,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:33,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:52:33,129 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) [2022-07-20 21:52:33,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 21:52:33,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-20 21:52:33,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:52:33,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-20 21:52:33,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:52:33,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:52:33,303 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:52:33,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:52:33,350 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:52:33,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:52:33,412 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:52:33,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:52:33,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:52:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 34 proven. 36 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-20 21:52:33,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:52:33,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:52:33,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:52:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-20 21:52:33,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422296533] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:52:33,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:52:33,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 22 [2022-07-20 21:52:33,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660829085] [2022-07-20 21:52:33,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:52:33,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-20 21:52:33,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:52:33,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-20 21:52:33,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-07-20 21:52:33,656 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 18 states have internal predecessors, (46), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-20 21:52:33,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:52:33,931 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2022-07-20 21:52:33,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-20 21:52:33,932 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 18 states have internal predecessors, (46), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) Word has length 51 [2022-07-20 21:52:33,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:52:33,933 INFO L225 Difference]: With dead ends: 71 [2022-07-20 21:52:33,933 INFO L226 Difference]: Without dead ends: 69 [2022-07-20 21:52:33,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 92 SyntacticMatches, 16 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2022-07-20 21:52:33,934 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 41 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:52:33,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 255 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 356 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2022-07-20 21:52:33,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-20 21:52:33,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 53. [2022-07-20 21:52:33,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 21:52:33,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-07-20 21:52:33,939 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 51 [2022-07-20 21:52:33,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:52:33,940 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-07-20 21:52:33,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 18 states have internal predecessors, (46), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-20 21:52:33,940 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-07-20 21:52:33,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-20 21:52:33,940 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:52:33,941 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:52:33,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 21:52:34,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:34,152 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:52:34,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:52:34,152 INFO L85 PathProgramCache]: Analyzing trace with hash -581569404, now seen corresponding path program 4 times [2022-07-20 21:52:34,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:52:34,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695452812] [2022-07-20 21:52:34,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:34,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:52:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:34,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:52:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:34,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:52:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:34,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:52:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:34,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:52:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:34,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:52:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:34,385 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-20 21:52:34,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:52:34,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695452812] [2022-07-20 21:52:34,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695452812] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:34,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550990352] [2022-07-20 21:52:34,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:52:34,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:34,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:52:34,388 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) [2022-07-20 21:52:34,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 21:52:34,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:52:34,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:52:34,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-20 21:52:34,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:52:34,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 21:52:34,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:52:34,640 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-20 21:52:34,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:52:34,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:52:34,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:52:34,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550990352] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:34,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:52:34,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2022-07-20 21:52:34,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14622016] [2022-07-20 21:52:34,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:52:34,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-20 21:52:34,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:52:34,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-20 21:52:34,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-07-20 21:52:34,783 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 25 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 21 states have internal predecessors, (55), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-20 21:52:35,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:52:35,434 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2022-07-20 21:52:35,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-20 21:52:35,434 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 21 states have internal predecessors, (55), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 51 [2022-07-20 21:52:35,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:52:35,435 INFO L225 Difference]: With dead ends: 86 [2022-07-20 21:52:35,435 INFO L226 Difference]: Without dead ends: 84 [2022-07-20 21:52:35,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=352, Invalid=2098, Unknown=0, NotChecked=0, Total=2450 [2022-07-20 21:52:35,436 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 156 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:52:35,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 285 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:52:35,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-20 21:52:35,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 57. [2022-07-20 21:52:35,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 21:52:35,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-07-20 21:52:35,443 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 51 [2022-07-20 21:52:35,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:52:35,443 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-07-20 21:52:35,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 21 states have internal predecessors, (55), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-20 21:52:35,444 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-07-20 21:52:35,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-20 21:52:35,444 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:52:35,444 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:52:35,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-20 21:52:35,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:35,661 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:52:35,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:52:35,661 INFO L85 PathProgramCache]: Analyzing trace with hash 2001937361, now seen corresponding path program 5 times [2022-07-20 21:52:35,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:52:35,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744367232] [2022-07-20 21:52:35,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:35,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:52:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:35,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:52:35,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:35,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:52:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:35,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:52:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:35,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:52:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:35,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:52:35,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:35,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:52:35,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-20 21:52:35,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:52:35,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744367232] [2022-07-20 21:52:35,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744367232] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:35,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051611876] [2022-07-20 21:52:35,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:52:35,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:35,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:52:35,844 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) [2022-07-20 21:52:35,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 21:52:35,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-20 21:52:35,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:52:35,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-20 21:52:35,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:52:35,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:52:36,074 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:52:36,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:52:36,142 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:52:36,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:52:36,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:52:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 32 proven. 42 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 21:52:36,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:52:36,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:52:36,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:52:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 44 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-20 21:52:36,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051611876] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:52:36,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:52:36,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 25 [2022-07-20 21:52:36,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646489048] [2022-07-20 21:52:36,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:52:36,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-20 21:52:36,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:52:36,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-20 21:52:36,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-07-20 21:52:36,425 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 21 states have internal predecessors, (58), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2022-07-20 21:52:36,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:52:36,639 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2022-07-20 21:52:36,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-20 21:52:36,640 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 21 states have internal predecessors, (58), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) Word has length 55 [2022-07-20 21:52:36,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:52:36,641 INFO L225 Difference]: With dead ends: 73 [2022-07-20 21:52:36,641 INFO L226 Difference]: Without dead ends: 71 [2022-07-20 21:52:36,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 100 SyntacticMatches, 13 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2022-07-20 21:52:36,642 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:52:36,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 201 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 321 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-07-20 21:52:36,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-20 21:52:36,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2022-07-20 21:52:36,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 21:52:36,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-07-20 21:52:36,647 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 55 [2022-07-20 21:52:36,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:52:36,648 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-07-20 21:52:36,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 21 states have internal predecessors, (58), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2022-07-20 21:52:36,648 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-07-20 21:52:36,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-20 21:52:36,659 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:52:36,659 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:52:36,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 21:52:36,860 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,SelfDestructingSolverStorable9 [2022-07-20 21:52:36,860 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:52:36,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:52:36,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1453174918, now seen corresponding path program 6 times [2022-07-20 21:52:36,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:52:36,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127949256] [2022-07-20 21:52:36,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:36,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:52:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:36,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:52:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:36,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:52:36,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:36,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:52:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:36,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:52:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:36,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:52:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:36,943 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 21:52:36,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:52:36,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127949256] [2022-07-20 21:52:36,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127949256] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:36,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327265730] [2022-07-20 21:52:36,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:52:36,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:36,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:52:36,945 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) [2022-07-20 21:52:36,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 21:52:36,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-20 21:52:36,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:52:36,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 21:52:36,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:52:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 21:52:37,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:52:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 21:52:37,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327265730] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:52:37,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:52:37,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-20 21:52:37,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204647740] [2022-07-20 21:52:37,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:52:37,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 21:52:37,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:52:37,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 21:52:37,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-20 21:52:37,123 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 21:52:37,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:52:37,226 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2022-07-20 21:52:37,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 21:52:37,227 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 55 [2022-07-20 21:52:37,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:52:37,227 INFO L225 Difference]: With dead ends: 89 [2022-07-20 21:52:37,227 INFO L226 Difference]: Without dead ends: 69 [2022-07-20 21:52:37,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-07-20 21:52:37,228 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 70 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:52:37,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 171 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:52:37,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-20 21:52:37,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2022-07-20 21:52:37,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 21:52:37,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-07-20 21:52:37,234 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 55 [2022-07-20 21:52:37,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:52:37,234 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-07-20 21:52:37,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 21:52:37,235 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-07-20 21:52:37,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-20 21:52:37,235 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:52:37,235 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:52:37,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 21:52:37,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:37,450 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:52:37,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:52:37,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1754460089, now seen corresponding path program 7 times [2022-07-20 21:52:37,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:52:37,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834562908] [2022-07-20 21:52:37,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:37,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:52:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:37,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:52:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:37,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:52:37,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:37,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:52:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:37,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:52:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:37,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:52:37,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:37,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:52:37,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:37,683 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-20 21:52:37,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:52:37,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834562908] [2022-07-20 21:52:37,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834562908] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:37,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271583142] [2022-07-20 21:52:37,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:52:37,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:37,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:52:37,685 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) [2022-07-20 21:52:37,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 21:52:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:37,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-20 21:52:37,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:52:37,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:52:37,950 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:52:37,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:52:38,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:52:38,047 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-20 21:52:38,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:52:38,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271583142] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:38,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:52:38,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2022-07-20 21:52:38,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322933553] [2022-07-20 21:52:38,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:52:38,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-20 21:52:38,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:52:38,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-20 21:52:38,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 21:52:38,159 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 25 states have internal predecessors, (64), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2022-07-20 21:52:38,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:52:38,685 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2022-07-20 21:52:38,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-20 21:52:38,686 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 25 states have internal predecessors, (64), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 59 [2022-07-20 21:52:38,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:52:38,686 INFO L225 Difference]: With dead ends: 84 [2022-07-20 21:52:38,686 INFO L226 Difference]: Without dead ends: 82 [2022-07-20 21:52:38,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=305, Invalid=2245, Unknown=0, NotChecked=0, Total=2550 [2022-07-20 21:52:38,688 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 89 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:52:38,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 303 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 528 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2022-07-20 21:52:38,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-20 21:52:38,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2022-07-20 21:52:38,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-20 21:52:38,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2022-07-20 21:52:38,694 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 59 [2022-07-20 21:52:38,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:52:38,695 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2022-07-20 21:52:38,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 25 states have internal predecessors, (64), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2022-07-20 21:52:38,695 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2022-07-20 21:52:38,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-20 21:52:38,696 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:52:38,696 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:52:38,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 21:52:38,907 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,SelfDestructingSolverStorable11 [2022-07-20 21:52:38,908 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:52:38,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:52:38,908 INFO L85 PathProgramCache]: Analyzing trace with hash 120574397, now seen corresponding path program 8 times [2022-07-20 21:52:38,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:52:38,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98696253] [2022-07-20 21:52:38,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:38,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:52:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:39,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:52:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:39,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:52:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:39,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:52:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:39,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:52:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:39,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:52:39,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:39,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:52:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-20 21:52:39,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:52:39,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98696253] [2022-07-20 21:52:39,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98696253] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:39,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732533565] [2022-07-20 21:52:39,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:52:39,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:39,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:52:39,097 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) [2022-07-20 21:52:39,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 21:52:39,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:52:39,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:52:39,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-20 21:52:39,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:52:39,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:52:39,551 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-20 21:52:39,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-07-20 21:52:39,577 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 30 proven. 40 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-20 21:52:39,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:52:39,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-20 21:52:39,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-07-20 21:52:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 27 proven. 43 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-20 21:52:40,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732533565] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:52:40,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:52:40,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 44 [2022-07-20 21:52:40,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431453454] [2022-07-20 21:52:40,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:52:40,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-20 21:52:40,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:52:40,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-20 21:52:40,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1669, Unknown=0, NotChecked=0, Total=1892 [2022-07-20 21:52:40,176 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 39 states have internal predecessors, (98), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2022-07-20 21:52:40,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:52:40,852 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2022-07-20 21:52:40,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-20 21:52:40,852 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 39 states have internal predecessors, (98), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) Word has length 63 [2022-07-20 21:52:40,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:52:40,853 INFO L225 Difference]: With dead ends: 80 [2022-07-20 21:52:40,853 INFO L226 Difference]: Without dead ends: 60 [2022-07-20 21:52:40,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=546, Invalid=3876, Unknown=0, NotChecked=0, Total=4422 [2022-07-20 21:52:40,854 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 50 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:52:40,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 254 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 255 Invalid, 0 Unknown, 152 Unchecked, 0.1s Time] [2022-07-20 21:52:40,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-20 21:52:40,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-20 21:52:40,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-20 21:52:40,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2022-07-20 21:52:40,861 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 63 [2022-07-20 21:52:40,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:52:40,861 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2022-07-20 21:52:40,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 39 states have internal predecessors, (98), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2022-07-20 21:52:40,861 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2022-07-20 21:52:40,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-20 21:52:40,862 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:52:40,862 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:52:40,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-20 21:52:41,062 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,SelfDestructingSolverStorable12 [2022-07-20 21:52:41,062 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:52:41,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:52:41,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1918482698, now seen corresponding path program 9 times [2022-07-20 21:52:41,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:52:41,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898233048] [2022-07-20 21:52:41,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:41,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:52:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:41,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:52:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:41,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:52:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:41,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:52:41,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:41,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:52:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:41,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:52:41,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:41,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:52:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:41,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:52:41,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:41,337 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 12 proven. 71 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-20 21:52:41,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:52:41,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898233048] [2022-07-20 21:52:41,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898233048] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:41,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389549549] [2022-07-20 21:52:41,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:52:41,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:41,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:52:41,339 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) [2022-07-20 21:52:41,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 21:52:41,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-20 21:52:41,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:52:41,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-20 21:52:41,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:52:41,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:52:41,645 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:52:41,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:52:41,738 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:52:41,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:52:41,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:52:41,841 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 43 proven. 68 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-20 21:52:41,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:52:41,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389549549] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:41,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:52:41,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 32 [2022-07-20 21:52:41,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939736589] [2022-07-20 21:52:41,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:52:41,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-20 21:52:41,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:52:41,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-20 21:52:41,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2022-07-20 21:52:41,973 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 32 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 28 states have internal predecessors, (70), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2022-07-20 21:52:42,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:52:42,508 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2022-07-20 21:52:42,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-20 21:52:42,509 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 28 states have internal predecessors, (70), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) Word has length 67 [2022-07-20 21:52:42,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:52:42,509 INFO L225 Difference]: With dead ends: 74 [2022-07-20 21:52:42,509 INFO L226 Difference]: Without dead ends: 72 [2022-07-20 21:52:42,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=333, Invalid=2529, Unknown=0, NotChecked=0, Total=2862 [2022-07-20 21:52:42,511 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 77 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:52:42,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 327 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 552 Invalid, 0 Unknown, 18 Unchecked, 0.2s Time] [2022-07-20 21:52:42,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-20 21:52:42,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2022-07-20 21:52:42,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-20 21:52:42,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2022-07-20 21:52:42,520 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 67 [2022-07-20 21:52:42,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:52:42,521 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2022-07-20 21:52:42,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 28 states have internal predecessors, (70), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2022-07-20 21:52:42,521 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2022-07-20 21:52:42,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-20 21:52:42,522 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:52:42,522 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:52:42,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 21:52:42,735 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,SelfDestructingSolverStorable13 [2022-07-20 21:52:42,735 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:52:42,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:52:42,736 INFO L85 PathProgramCache]: Analyzing trace with hash -700161792, now seen corresponding path program 10 times [2022-07-20 21:52:42,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:52:42,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428144007] [2022-07-20 21:52:42,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:42,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:52:42,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:42,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:52:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:42,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:52:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:43,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:52:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:43,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:52:43,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:43,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:52:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:43,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:52:43,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:43,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:52:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 78 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-20 21:52:43,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:52:43,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428144007] [2022-07-20 21:52:43,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428144007] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:43,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521174931] [2022-07-20 21:52:43,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:52:43,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:43,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:52:43,028 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) [2022-07-20 21:52:43,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 21:52:43,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:52:43,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:52:43,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-20 21:52:43,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:52:43,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:52:45,323 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-20 21:52:45,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-20 21:52:45,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:52:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 33 proven. 78 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-20 21:52:45,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:52:45,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521174931] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:45,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:52:45,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 25 [2022-07-20 21:52:45,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004576714] [2022-07-20 21:52:45,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:52:45,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-20 21:52:45,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:52:45,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-20 21:52:45,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=609, Unknown=1, NotChecked=0, Total=702 [2022-07-20 21:52:45,525 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-20 21:52:45,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:52:45,876 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2022-07-20 21:52:45,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-20 21:52:45,876 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 71 [2022-07-20 21:52:45,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:52:45,877 INFO L225 Difference]: With dead ends: 98 [2022-07-20 21:52:45,877 INFO L226 Difference]: Without dead ends: 96 [2022-07-20 21:52:45,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 91 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=184, Invalid=1297, Unknown=1, NotChecked=0, Total=1482 [2022-07-20 21:52:45,878 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:52:45,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 295 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 433 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2022-07-20 21:52:45,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-20 21:52:45,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2022-07-20 21:52:45,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-20 21:52:45,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2022-07-20 21:52:45,885 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 71 [2022-07-20 21:52:45,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:52:45,886 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2022-07-20 21:52:45,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-20 21:52:45,886 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2022-07-20 21:52:45,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-20 21:52:45,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:52:45,887 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:52:45,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 21:52:46,099 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,SelfDestructingSolverStorable14 [2022-07-20 21:52:46,099 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:52:46,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:52:46,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1947082230, now seen corresponding path program 11 times [2022-07-20 21:52:46,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:52:46,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344496806] [2022-07-20 21:52:46,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:46,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:52:46,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:46,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:52:46,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:46,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:52:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:46,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:52:46,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:46,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:52:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:46,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:52:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:46,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:52:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:46,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:52:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:46,318 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 18 proven. 89 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-20 21:52:46,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:52:46,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344496806] [2022-07-20 21:52:46,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344496806] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:46,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947656120] [2022-07-20 21:52:46,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:52:46,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:46,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:52:46,320 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) [2022-07-20 21:52:46,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 21:52:46,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-20 21:52:46,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:52:46,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-20 21:52:46,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:52:46,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:52:46,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:52:46,660 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 18 proven. 89 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-20 21:52:46,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:52:46,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:52:46,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:52:46,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947656120] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:46,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:52:46,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 24 [2022-07-20 21:52:46,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671381622] [2022-07-20 21:52:46,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:52:46,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-20 21:52:46,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:52:46,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-20 21:52:46,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-07-20 21:52:46,773 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 6 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-20 21:52:47,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:52:47,401 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2022-07-20 21:52:47,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-20 21:52:47,402 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 6 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 75 [2022-07-20 21:52:47,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:52:47,402 INFO L225 Difference]: With dead ends: 118 [2022-07-20 21:52:47,403 INFO L226 Difference]: Without dead ends: 116 [2022-07-20 21:52:47,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 98 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=261, Invalid=1995, Unknown=0, NotChecked=0, Total=2256 [2022-07-20 21:52:47,404 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 93 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:52:47,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 440 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 21:52:47,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-20 21:52:47,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 81. [2022-07-20 21:52:47,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-20 21:52:47,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2022-07-20 21:52:47,411 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 75 [2022-07-20 21:52:47,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:52:47,412 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2022-07-20 21:52:47,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 6 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-20 21:52:47,412 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2022-07-20 21:52:47,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-20 21:52:47,412 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:52:47,413 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:52:47,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-20 21:52:47,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:47,613 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:52:47,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:52:47,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1497562435, now seen corresponding path program 12 times [2022-07-20 21:52:47,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:52:47,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486777967] [2022-07-20 21:52:47,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:47,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:52:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:47,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:52:47,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:47,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:52:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:47,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:52:47,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:47,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:52:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:47,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:52:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:47,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:52:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:47,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:52:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:47,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:52:47,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-20 21:52:47,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:52:47,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486777967] [2022-07-20 21:52:47,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486777967] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:47,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87151339] [2022-07-20 21:52:47,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:52:47,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:47,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:52:47,844 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) [2022-07-20 21:52:47,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-20 21:52:47,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-20 21:52:47,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:52:47,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-20 21:52:47,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:52:48,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:52:48,153 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:52:48,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:52:48,232 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:52:48,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:52:48,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:52:48,348 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 54 proven. 102 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 21:52:48,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:52:48,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:52:48,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:52:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 15 proven. 104 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-20 21:52:48,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87151339] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:52:48,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:52:48,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 33 [2022-07-20 21:52:48,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650038294] [2022-07-20 21:52:48,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:52:48,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-20 21:52:48,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:52:48,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-20 21:52:48,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 21:52:48,632 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 29 states have internal predecessors, (86), 12 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) [2022-07-20 21:52:48,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:52:48,986 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2022-07-20 21:52:48,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-20 21:52:48,986 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 29 states have internal predecessors, (86), 12 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) Word has length 79 [2022-07-20 21:52:48,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:52:48,987 INFO L225 Difference]: With dead ends: 100 [2022-07-20 21:52:48,987 INFO L226 Difference]: Without dead ends: 98 [2022-07-20 21:52:48,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 149 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2022-07-20 21:52:48,988 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 45 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:52:48,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 315 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 603 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2022-07-20 21:52:48,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-20 21:52:48,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 81. [2022-07-20 21:52:48,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-20 21:52:48,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2022-07-20 21:52:48,997 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 79 [2022-07-20 21:52:48,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:52:48,998 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2022-07-20 21:52:48,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 29 states have internal predecessors, (86), 12 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) [2022-07-20 21:52:48,998 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2022-07-20 21:52:48,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-20 21:52:48,998 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:52:48,999 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:52:49,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-20 21:52:49,211 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,SelfDestructingSolverStorable16 [2022-07-20 21:52:49,212 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:52:49,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:52:49,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1814327276, now seen corresponding path program 13 times [2022-07-20 21:52:49,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:52:49,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241151696] [2022-07-20 21:52:49,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:49,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:52:49,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:49,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:52:49,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:49,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:52:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:49,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:52:49,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:49,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:52:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:49,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:52:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:49,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:52:49,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:49,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:52:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 33 proven. 62 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-20 21:52:49,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:52:49,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241151696] [2022-07-20 21:52:49,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241151696] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:49,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741626795] [2022-07-20 21:52:49,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:52:49,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:49,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:52:49,337 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) [2022-07-20 21:52:49,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-20 21:52:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:49,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 21:52:49,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:52:49,530 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-20 21:52:49,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:52:49,597 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-20 21:52:49,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741626795] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:52:49,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:52:49,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-20 21:52:49,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905410511] [2022-07-20 21:52:49,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:52:49,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-20 21:52:49,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:52:49,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-20 21:52:49,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-20 21:52:49,598 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-20 21:52:49,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:52:49,743 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2022-07-20 21:52:49,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 21:52:49,743 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 79 [2022-07-20 21:52:49,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:52:49,744 INFO L225 Difference]: With dead ends: 121 [2022-07-20 21:52:49,744 INFO L226 Difference]: Without dead ends: 93 [2022-07-20 21:52:49,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-07-20 21:52:49,745 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 72 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:52:49,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 232 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:52:49,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-20 21:52:49,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2022-07-20 21:52:49,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-20 21:52:49,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2022-07-20 21:52:49,753 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 79 [2022-07-20 21:52:49,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:52:49,753 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2022-07-20 21:52:49,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-20 21:52:49,753 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2022-07-20 21:52:49,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-20 21:52:49,754 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:52:49,754 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:52:49,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-20 21:52:49,971 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,SelfDestructingSolverStorable17 [2022-07-20 21:52:49,972 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:52:49,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:52:49,972 INFO L85 PathProgramCache]: Analyzing trace with hash -502341447, now seen corresponding path program 14 times [2022-07-20 21:52:49,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:52:49,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708728703] [2022-07-20 21:52:49,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:49,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:52:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:50,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:52:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:50,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:52:50,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:50,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:52:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:50,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:52:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:50,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:52:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:50,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:52:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:50,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:52:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:50,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:52:50,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:50,237 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 116 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-20 21:52:50,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:52:50,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708728703] [2022-07-20 21:52:50,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708728703] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:50,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314024894] [2022-07-20 21:52:50,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:52:50,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:50,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:52:50,239 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) [2022-07-20 21:52:50,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-20 21:52:50,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:52:50,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:52:50,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-20 21:52:50,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:52:50,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:52:52,650 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-20 21:52:52,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-20 21:52:52,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:52:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 40 proven. 116 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-20 21:52:52,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:52:52,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:52:52,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:52:53,090 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 116 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-20 21:52:53,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314024894] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:52:53,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:52:53,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 38 [2022-07-20 21:52:53,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422855172] [2022-07-20 21:52:53,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:52:53,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-20 21:52:53,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:52:53,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-20 21:52:53,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1269, Unknown=1, NotChecked=0, Total=1406 [2022-07-20 21:52:53,092 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 38 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 33 states have internal predecessors, (96), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (16), 16 states have call predecessors, (16), 14 states have call successors, (16) [2022-07-20 21:52:53,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:52:53,540 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2022-07-20 21:52:53,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-20 21:52:53,540 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 33 states have internal predecessors, (96), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (16), 16 states have call predecessors, (16), 14 states have call successors, (16) Word has length 83 [2022-07-20 21:52:53,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:52:53,541 INFO L225 Difference]: With dead ends: 113 [2022-07-20 21:52:53,541 INFO L226 Difference]: Without dead ends: 111 [2022-07-20 21:52:53,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 156 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=257, Invalid=2394, Unknown=1, NotChecked=0, Total=2652 [2022-07-20 21:52:53,542 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:52:53,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 436 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 719 Invalid, 0 Unknown, 97 Unchecked, 0.3s Time] [2022-07-20 21:52:53,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-07-20 21:52:53,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 89. [2022-07-20 21:52:53,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 21:52:53,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2022-07-20 21:52:53,551 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 83 [2022-07-20 21:52:53,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:52:53,552 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2022-07-20 21:52:53,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 33 states have internal predecessors, (96), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (16), 16 states have call predecessors, (16), 14 states have call successors, (16) [2022-07-20 21:52:53,552 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2022-07-20 21:52:53,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-20 21:52:53,552 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:52:53,552 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:52:53,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-20 21:52:53,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:53,753 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:52:53,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:52:53,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1833952977, now seen corresponding path program 15 times [2022-07-20 21:52:53,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:52:53,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740247461] [2022-07-20 21:52:53,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:53,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:52:53,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:53,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:52:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:53,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:52:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:53,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:52:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:53,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:52:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:53,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:52:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:53,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:52:54,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:54,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:52:54,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:54,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:52:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:54,007 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 21 proven. 131 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-20 21:52:54,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:52:54,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740247461] [2022-07-20 21:52:54,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740247461] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:54,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784132693] [2022-07-20 21:52:54,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:52:54,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:54,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:52:54,010 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) [2022-07-20 21:52:54,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-20 21:52:54,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-20 21:52:54,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:52:54,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-20 21:52:54,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:52:54,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:52:54,813 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-07-20 21:52:54,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-07-20 21:52:54,839 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 21 proven. 131 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-20 21:52:54,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:52:55,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:52:55,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:52:55,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784132693] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:55,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:52:55,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 39 [2022-07-20 21:52:55,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409677875] [2022-07-20 21:52:55,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:52:55,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-20 21:52:55,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:52:55,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-20 21:52:55,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=2162, Unknown=0, NotChecked=0, Total=2450 [2022-07-20 21:52:55,204 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 39 states, 38 states have (on average 2.526315789473684) internal successors, (96), 35 states have internal predecessors, (96), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2022-07-20 21:52:55,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:52:55,582 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2022-07-20 21:52:55,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-20 21:52:55,582 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.526315789473684) internal successors, (96), 35 states have internal predecessors, (96), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) Word has length 87 [2022-07-20 21:52:55,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:52:55,583 INFO L225 Difference]: With dead ends: 112 [2022-07-20 21:52:55,583 INFO L226 Difference]: Without dead ends: 110 [2022-07-20 21:52:55,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=374, Invalid=2706, Unknown=0, NotChecked=0, Total=3080 [2022-07-20 21:52:55,584 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 41 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:52:55,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 533 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 679 Invalid, 0 Unknown, 85 Unchecked, 0.3s Time] [2022-07-20 21:52:55,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-20 21:52:55,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2022-07-20 21:52:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 21:52:55,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2022-07-20 21:52:55,595 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 87 [2022-07-20 21:52:55,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:52:55,595 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2022-07-20 21:52:55,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.526315789473684) internal successors, (96), 35 states have internal predecessors, (96), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2022-07-20 21:52:55,595 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2022-07-20 21:52:55,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-20 21:52:55,596 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:52:55,596 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:52:55,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-20 21:52:55,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:55,803 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:52:55,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:52:55,804 INFO L85 PathProgramCache]: Analyzing trace with hash 474886268, now seen corresponding path program 16 times [2022-07-20 21:52:55,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:52:55,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214553752] [2022-07-20 21:52:55,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:55,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:52:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:56,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:52:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:56,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:52:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:56,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:52:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:56,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:52:56,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:56,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:52:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:56,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:52:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:56,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:52:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:56,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:52:56,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:56,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:52:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 18 proven. 147 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-20 21:52:56,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:52:56,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214553752] [2022-07-20 21:52:56,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214553752] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:56,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268421222] [2022-07-20 21:52:56,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:52:56,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:56,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:52:56,055 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) [2022-07-20 21:52:56,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-20 21:52:56,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:52:56,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:52:56,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-20 21:52:56,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:52:56,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:52:56,405 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:52:56,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:52:56,491 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:52:56,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:52:56,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:52:56,623 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 65 proven. 144 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-20 21:52:56,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:52:56,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:52:56,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:52:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 18 proven. 146 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-20 21:52:56,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268421222] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:52:56,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:52:56,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 37 [2022-07-20 21:52:56,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919572342] [2022-07-20 21:52:56,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:52:56,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-20 21:52:56,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:52:56,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-20 21:52:56,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1198, Unknown=0, NotChecked=0, Total=1332 [2022-07-20 21:52:56,941 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 37 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 33 states have internal predecessors, (100), 14 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 16 states have call predecessors, (17), 14 states have call successors, (17) [2022-07-20 21:52:57,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:52:57,482 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2022-07-20 21:52:57,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-20 21:52:57,483 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 33 states have internal predecessors, (100), 14 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 16 states have call predecessors, (17), 14 states have call successors, (17) Word has length 91 [2022-07-20 21:52:57,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:52:57,483 INFO L225 Difference]: With dead ends: 121 [2022-07-20 21:52:57,484 INFO L226 Difference]: Without dead ends: 119 [2022-07-20 21:52:57,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 173 SyntacticMatches, 13 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=252, Invalid=2298, Unknown=0, NotChecked=0, Total=2550 [2022-07-20 21:52:57,485 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 71 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:52:57,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 629 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1101 Invalid, 0 Unknown, 30 Unchecked, 0.4s Time] [2022-07-20 21:52:57,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-20 21:52:57,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 93. [2022-07-20 21:52:57,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 21:52:57,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2022-07-20 21:52:57,496 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 91 [2022-07-20 21:52:57,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:52:57,496 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2022-07-20 21:52:57,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 33 states have internal predecessors, (100), 14 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 16 states have call predecessors, (17), 14 states have call successors, (17) [2022-07-20 21:52:57,496 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2022-07-20 21:52:57,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-20 21:52:57,497 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:52:57,497 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:52:57,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-20 21:52:57,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:57,697 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:52:57,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:52:57,698 INFO L85 PathProgramCache]: Analyzing trace with hash 645146277, now seen corresponding path program 17 times [2022-07-20 21:52:57,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:52:57,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353921031] [2022-07-20 21:52:57,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:57,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:52:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:57,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:52:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:57,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:52:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:57,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:52:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:57,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:52:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:57,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:52:57,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:57,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:52:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:57,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:52:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:57,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:52:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 51 proven. 87 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-20 21:52:57,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:52:57,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353921031] [2022-07-20 21:52:57,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353921031] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:57,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195975192] [2022-07-20 21:52:57,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:52:57,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:57,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:52:57,815 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) [2022-07-20 21:52:57,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-20 21:52:57,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-20 21:52:57,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:52:57,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 21:52:57,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:52:58,056 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-20 21:52:58,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:52:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-20 21:52:58,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195975192] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:52:58,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:52:58,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-07-20 21:52:58,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276761061] [2022-07-20 21:52:58,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:52:58,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 21:52:58,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:52:58,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 21:52:58,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-07-20 21:52:58,138 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-20 21:52:58,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:52:58,298 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2022-07-20 21:52:58,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 21:52:58,299 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 91 [2022-07-20 21:52:58,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:52:58,300 INFO L225 Difference]: With dead ends: 137 [2022-07-20 21:52:58,300 INFO L226 Difference]: Without dead ends: 105 [2022-07-20 21:52:58,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 188 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 21:52:58,301 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 125 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:52:58,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 183 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:52:58,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-20 21:52:58,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2022-07-20 21:52:58,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 21:52:58,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2022-07-20 21:52:58,316 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 91 [2022-07-20 21:52:58,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:52:58,316 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2022-07-20 21:52:58,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-20 21:52:58,317 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2022-07-20 21:52:58,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-20 21:52:58,317 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:52:58,317 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:52:58,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-20 21:52:58,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-20 21:52:58,531 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:52:58,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:52:58,532 INFO L85 PathProgramCache]: Analyzing trace with hash -110375054, now seen corresponding path program 18 times [2022-07-20 21:52:58,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:52:58,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339614826] [2022-07-20 21:52:58,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:52:58,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:52:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:58,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:52:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:58,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:52:58,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:58,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:52:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:58,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:52:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:58,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:52:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:58,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:52:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:58,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:52:58,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:58,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:52:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:58,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:52:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:52:58,816 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 21 proven. 162 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-20 21:52:58,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:52:58,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339614826] [2022-07-20 21:52:58,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339614826] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:52:58,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495614197] [2022-07-20 21:52:58,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:52:58,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:52:58,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:52:58,818 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) [2022-07-20 21:52:58,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-20 21:52:58,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-20 21:52:58,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:52:58,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-20 21:52:58,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:52:59,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:53:01,318 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-20 21:53:01,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-20 21:53:01,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:53:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 47 proven. 162 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-20 21:53:01,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:53:01,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:53:01,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:53:01,819 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 21 proven. 162 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-20 21:53:01,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495614197] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:53:01,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:53:01,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 42 [2022-07-20 21:53:01,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871994189] [2022-07-20 21:53:01,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:53:01,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-20 21:53:01,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:53:01,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-20 21:53:01,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1569, Unknown=1, NotChecked=0, Total=1722 [2022-07-20 21:53:01,820 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 42 states, 41 states have (on average 2.682926829268293) internal successors, (110), 37 states have internal predecessors, (110), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) [2022-07-20 21:53:02,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:53:02,404 INFO L93 Difference]: Finished difference Result 129 states and 133 transitions. [2022-07-20 21:53:02,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-20 21:53:02,405 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.682926829268293) internal successors, (110), 37 states have internal predecessors, (110), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) Word has length 95 [2022-07-20 21:53:02,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:53:02,408 INFO L225 Difference]: With dead ends: 129 [2022-07-20 21:53:02,408 INFO L226 Difference]: Without dead ends: 127 [2022-07-20 21:53:02,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 180 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=281, Invalid=2910, Unknown=1, NotChecked=0, Total=3192 [2022-07-20 21:53:02,409 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 82 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:53:02,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 543 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 994 Invalid, 0 Unknown, 68 Unchecked, 0.4s Time] [2022-07-20 21:53:02,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-20 21:53:02,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 101. [2022-07-20 21:53:02,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-20 21:53:02,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2022-07-20 21:53:02,420 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 95 [2022-07-20 21:53:02,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:53:02,421 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2022-07-20 21:53:02,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.682926829268293) internal successors, (110), 37 states have internal predecessors, (110), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) [2022-07-20 21:53:02,421 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2022-07-20 21:53:02,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-20 21:53:02,422 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:53:02,422 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:53:02,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-20 21:53:02,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-20 21:53:02,626 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:53:02,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:53:02,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1072364696, now seen corresponding path program 19 times [2022-07-20 21:53:02,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:53:02,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61395176] [2022-07-20 21:53:02,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:53:02,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:53:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:02,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:53:02,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:02,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:53:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:02,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:53:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:02,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:53:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:02,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:53:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:02,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:53:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:02,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:53:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:02,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:53:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:02,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:53:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:02,903 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 24 proven. 181 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-20 21:53:02,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:53:02,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61395176] [2022-07-20 21:53:02,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61395176] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:53:02,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953148844] [2022-07-20 21:53:02,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:53:02,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:53:02,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:53:02,905 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) [2022-07-20 21:53:02,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-20 21:53:02,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:02,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-20 21:53:02,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:53:03,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 21:53:03,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:53:03,473 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 24 proven. 181 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-20 21:53:03,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:53:03,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:53:03,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:53:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 24 proven. 181 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-20 21:53:03,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953148844] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:53:03,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:53:03,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 42 [2022-07-20 21:53:03,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739620287] [2022-07-20 21:53:03,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:53:03,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-20 21:53:03,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:53:03,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-20 21:53:03,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1585, Unknown=0, NotChecked=0, Total=1722 [2022-07-20 21:53:03,751 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 42 states, 41 states have (on average 2.8048780487804876) internal successors, (115), 37 states have internal predecessors, (115), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) [2022-07-20 21:53:04,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:53:04,667 INFO L93 Difference]: Finished difference Result 150 states and 155 transitions. [2022-07-20 21:53:04,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-20 21:53:04,668 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.8048780487804876) internal successors, (115), 37 states have internal predecessors, (115), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) Word has length 99 [2022-07-20 21:53:04,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:53:04,669 INFO L225 Difference]: With dead ends: 150 [2022-07-20 21:53:04,669 INFO L226 Difference]: Without dead ends: 148 [2022-07-20 21:53:04,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 192 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=424, Invalid=4268, Unknown=0, NotChecked=0, Total=4692 [2022-07-20 21:53:04,670 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 219 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:53:04,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 657 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1278 Invalid, 0 Unknown, 69 Unchecked, 0.5s Time] [2022-07-20 21:53:04,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-20 21:53:04,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 105. [2022-07-20 21:53:04,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-20 21:53:04,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2022-07-20 21:53:04,687 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 99 [2022-07-20 21:53:04,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:53:04,688 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2022-07-20 21:53:04,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.8048780487804876) internal successors, (115), 37 states have internal predecessors, (115), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) [2022-07-20 21:53:04,688 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2022-07-20 21:53:04,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-20 21:53:04,689 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:53:04,689 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:53:04,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-20 21:53:04,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:53:04,895 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:53:04,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:53:04,896 INFO L85 PathProgramCache]: Analyzing trace with hash -369454411, now seen corresponding path program 20 times [2022-07-20 21:53:04,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:53:04,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981150030] [2022-07-20 21:53:04,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:53:04,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:53:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:05,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:53:05,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:05,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:53:05,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:05,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:53:05,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:05,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:53:05,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:05,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:53:05,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:05,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:53:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:05,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:53:05,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:05,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:53:05,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:05,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:53:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:05,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:53:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 21 proven. 197 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-20 21:53:05,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:53:05,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981150030] [2022-07-20 21:53:05,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981150030] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:53:05,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333061780] [2022-07-20 21:53:05,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:53:05,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:53:05,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:53:05,177 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) [2022-07-20 21:53:05,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-20 21:53:05,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:53:05,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:53:05,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-20 21:53:05,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:53:05,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:53:05,583 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:53:05,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:53:05,670 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:53:05,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:53:05,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:53:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 76 proven. 194 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-07-20 21:53:05,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:53:05,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:53:05,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:53:06,161 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 21 proven. 196 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-07-20 21:53:06,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333061780] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:53:06,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:53:06,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 41 [2022-07-20 21:53:06,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939824898] [2022-07-20 21:53:06,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:53:06,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-20 21:53:06,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:53:06,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-20 21:53:06,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1490, Unknown=0, NotChecked=0, Total=1640 [2022-07-20 21:53:06,163 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 41 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 37 states have internal predecessors, (114), 16 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2022-07-20 21:53:06,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:53:06,736 INFO L93 Difference]: Finished difference Result 137 states and 141 transitions. [2022-07-20 21:53:06,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-20 21:53:06,736 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 37 states have internal predecessors, (114), 16 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) Word has length 103 [2022-07-20 21:53:06,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:53:06,737 INFO L225 Difference]: With dead ends: 137 [2022-07-20 21:53:06,737 INFO L226 Difference]: Without dead ends: 135 [2022-07-20 21:53:06,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 197 SyntacticMatches, 13 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=276, Invalid=2804, Unknown=0, NotChecked=0, Total=3080 [2022-07-20 21:53:06,738 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 92 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:53:06,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 492 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1125 Invalid, 0 Unknown, 34 Unchecked, 0.4s Time] [2022-07-20 21:53:06,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-20 21:53:06,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 105. [2022-07-20 21:53:06,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-20 21:53:06,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2022-07-20 21:53:06,751 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 103 [2022-07-20 21:53:06,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:53:06,751 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2022-07-20 21:53:06,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 37 states have internal predecessors, (114), 16 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2022-07-20 21:53:06,752 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2022-07-20 21:53:06,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-20 21:53:06,752 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:53:06,752 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:53:06,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-20 21:53:06,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:53:06,967 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:53:06,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:53:06,968 INFO L85 PathProgramCache]: Analyzing trace with hash -428389282, now seen corresponding path program 21 times [2022-07-20 21:53:06,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:53:06,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137736646] [2022-07-20 21:53:06,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:53:06,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:53:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:07,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:53:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:07,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:53:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:07,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:53:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:07,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:53:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:07,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:53:07,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:07,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:53:07,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:07,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:53:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:07,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:53:07,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:07,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:53:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:07,110 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 73 proven. 116 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-20 21:53:07,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:53:07,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137736646] [2022-07-20 21:53:07,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137736646] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:53:07,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7298052] [2022-07-20 21:53:07,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:53:07,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:53:07,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:53:07,113 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) [2022-07-20 21:53:07,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-20 21:53:07,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-20 21:53:07,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:53:07,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 21:53:07,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:53:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-20 21:53:07,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:53:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-20 21:53:07,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7298052] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:53:07,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:53:07,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-07-20 21:53:07,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325208287] [2022-07-20 21:53:07,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:53:07,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-20 21:53:07,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:53:07,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-20 21:53:07,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2022-07-20 21:53:07,564 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-07-20 21:53:07,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:53:07,736 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2022-07-20 21:53:07,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-20 21:53:07,736 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 103 [2022-07-20 21:53:07,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:53:07,737 INFO L225 Difference]: With dead ends: 153 [2022-07-20 21:53:07,737 INFO L226 Difference]: Without dead ends: 117 [2022-07-20 21:53:07,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2022-07-20 21:53:07,738 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 118 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:53:07,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 219 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:53:07,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-20 21:53:07,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 100. [2022-07-20 21:53:07,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-20 21:53:07,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2022-07-20 21:53:07,750 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 103 [2022-07-20 21:53:07,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:53:07,750 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2022-07-20 21:53:07,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-07-20 21:53:07,750 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2022-07-20 21:53:07,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-20 21:53:07,751 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:53:07,751 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:53:07,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-20 21:53:07,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-20 21:53:07,966 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:53:07,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:53:07,966 INFO L85 PathProgramCache]: Analyzing trace with hash 2033872171, now seen corresponding path program 22 times [2022-07-20 21:53:07,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:53:07,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329999894] [2022-07-20 21:53:07,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:53:07,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:53:07,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:08,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:53:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:08,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:53:08,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:08,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:53:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:08,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:53:08,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:08,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:53:08,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:08,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:53:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:08,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:53:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:08,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:53:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:08,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:53:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:08,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:53:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:08,272 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 24 proven. 216 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-20 21:53:08,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:53:08,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329999894] [2022-07-20 21:53:08,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329999894] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:53:08,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793931397] [2022-07-20 21:53:08,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:53:08,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:53:08,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:53:08,274 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) [2022-07-20 21:53:08,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-20 21:53:08,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:53:08,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:53:08,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-20 21:53:08,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:53:08,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:53:10,817 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-20 21:53:10,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-20 21:53:11,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:53:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 54 proven. 216 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-20 21:53:11,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:53:11,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:53:11,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:53:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 24 proven. 216 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-20 21:53:11,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793931397] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:53:11,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:53:11,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 46 [2022-07-20 21:53:11,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404416208] [2022-07-20 21:53:11,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:53:11,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-20 21:53:11,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:53:11,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-20 21:53:11,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1901, Unknown=1, NotChecked=0, Total=2070 [2022-07-20 21:53:11,415 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 46 states, 45 states have (on average 2.7555555555555555) internal successors, (124), 41 states have internal predecessors, (124), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (20), 20 states have call predecessors, (20), 18 states have call successors, (20) [2022-07-20 21:53:12,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:53:12,079 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2022-07-20 21:53:12,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-20 21:53:12,080 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.7555555555555555) internal successors, (124), 41 states have internal predecessors, (124), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (20), 20 states have call predecessors, (20), 18 states have call successors, (20) Word has length 107 [2022-07-20 21:53:12,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:53:12,082 INFO L225 Difference]: With dead ends: 140 [2022-07-20 21:53:12,082 INFO L226 Difference]: Without dead ends: 138 [2022-07-20 21:53:12,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 207 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=276, Invalid=3145, Unknown=1, NotChecked=0, Total=3422 [2022-07-20 21:53:12,083 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 61 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:53:12,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 737 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1335 Invalid, 0 Unknown, 68 Unchecked, 0.5s Time] [2022-07-20 21:53:12,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-20 21:53:12,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 113. [2022-07-20 21:53:12,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-20 21:53:12,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2022-07-20 21:53:12,097 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 107 [2022-07-20 21:53:12,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:53:12,097 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2022-07-20 21:53:12,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.7555555555555555) internal successors, (124), 41 states have internal predecessors, (124), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (20), 20 states have call predecessors, (20), 18 states have call successors, (20) [2022-07-20 21:53:12,097 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2022-07-20 21:53:12,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-20 21:53:12,098 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:53:12,098 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:53:12,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-20 21:53:12,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-20 21:53:12,311 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:53:12,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:53:12,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1467751585, now seen corresponding path program 23 times [2022-07-20 21:53:12,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:53:12,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009458241] [2022-07-20 21:53:12,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:53:12,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:53:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:12,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:53:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:12,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:53:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:12,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:53:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:12,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:53:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:12,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:53:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:12,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:53:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:12,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:53:12,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:12,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:53:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:12,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:53:12,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:12,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:53:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:12,611 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 27 proven. 239 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-20 21:53:12,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:53:12,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009458241] [2022-07-20 21:53:12,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009458241] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:53:12,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338291678] [2022-07-20 21:53:12,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:53:12,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:53:12,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:53:12,613 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:53:12,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-20 21:53:12,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-20 21:53:12,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:53:12,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-20 21:53:12,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:53:13,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 21:53:13,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:53:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 27 proven. 239 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-20 21:53:13,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:53:13,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:53:13,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:53:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 27 proven. 239 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-20 21:53:13,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338291678] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:53:13,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:53:13,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 44 [2022-07-20 21:53:13,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479906065] [2022-07-20 21:53:13,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:53:13,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-20 21:53:13,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:53:13,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-20 21:53:13,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1750, Unknown=0, NotChecked=0, Total=1892 [2022-07-20 21:53:13,519 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand has 44 states, 44 states have (on average 2.909090909090909) internal successors, (128), 40 states have internal predecessors, (128), 17 states have call successors, (18), 1 states have call predecessors, (18), 2 states have return successors, (19), 19 states have call predecessors, (19), 17 states have call successors, (19) [2022-07-20 21:53:14,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:53:14,672 INFO L93 Difference]: Finished difference Result 166 states and 171 transitions. [2022-07-20 21:53:14,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-20 21:53:14,672 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.909090909090909) internal successors, (128), 40 states have internal predecessors, (128), 17 states have call successors, (18), 1 states have call predecessors, (18), 2 states have return successors, (19), 19 states have call predecessors, (19), 17 states have call successors, (19) Word has length 111 [2022-07-20 21:53:14,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:53:14,673 INFO L225 Difference]: With dead ends: 166 [2022-07-20 21:53:14,673 INFO L226 Difference]: Without dead ends: 164 [2022-07-20 21:53:14,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 217 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=457, Invalid=4945, Unknown=0, NotChecked=0, Total=5402 [2022-07-20 21:53:14,674 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 236 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1782 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 1973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:53:14,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 839 Invalid, 1973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1782 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 21:53:14,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-07-20 21:53:14,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 117. [2022-07-20 21:53:14,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-20 21:53:14,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2022-07-20 21:53:14,690 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 111 [2022-07-20 21:53:14,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:53:14,690 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2022-07-20 21:53:14,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.909090909090909) internal successors, (128), 40 states have internal predecessors, (128), 17 states have call successors, (18), 1 states have call predecessors, (18), 2 states have return successors, (19), 19 states have call predecessors, (19), 17 states have call successors, (19) [2022-07-20 21:53:14,691 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2022-07-20 21:53:14,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-20 21:53:14,691 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:53:14,691 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 9, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:53:14,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-20 21:53:14,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-20 21:53:14,907 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:53:14,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:53:14,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1057448942, now seen corresponding path program 24 times [2022-07-20 21:53:14,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:53:14,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526548233] [2022-07-20 21:53:14,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:53:14,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:53:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:15,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:53:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:15,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:53:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:15,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:53:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:15,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:53:15,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:15,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:53:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:15,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:53:15,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:15,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:53:15,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:15,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:53:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:15,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:53:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:15,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:53:15,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:15,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:53:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:15,224 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 24 proven. 255 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-20 21:53:15,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:53:15,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526548233] [2022-07-20 21:53:15,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526548233] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:53:15,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334357064] [2022-07-20 21:53:15,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:53:15,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:53:15,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:53:15,226 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:53:15,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-20 21:53:15,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-07-20 21:53:15,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:53:15,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-20 21:53:15,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:53:15,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:53:15,747 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:53:15,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:53:15,842 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:53:15,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:53:16,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:53:16,035 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 87 proven. 252 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-07-20 21:53:16,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:53:16,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:53:16,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:53:16,369 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 24 proven. 254 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2022-07-20 21:53:16,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334357064] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:53:16,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:53:16,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 45 [2022-07-20 21:53:16,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227590096] [2022-07-20 21:53:16,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:53:16,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-20 21:53:16,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:53:16,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-20 21:53:16,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1814, Unknown=0, NotChecked=0, Total=1980 [2022-07-20 21:53:16,371 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand has 45 states, 45 states have (on average 2.8444444444444446) internal successors, (128), 41 states have internal predecessors, (128), 18 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 20 states have call predecessors, (21), 18 states have call successors, (21) [2022-07-20 21:53:17,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:53:17,057 INFO L93 Difference]: Finished difference Result 153 states and 157 transitions. [2022-07-20 21:53:17,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-20 21:53:17,057 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.8444444444444446) internal successors, (128), 41 states have internal predecessors, (128), 18 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 20 states have call predecessors, (21), 18 states have call successors, (21) Word has length 115 [2022-07-20 21:53:17,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:53:17,058 INFO L225 Difference]: With dead ends: 153 [2022-07-20 21:53:17,058 INFO L226 Difference]: Without dead ends: 151 [2022-07-20 21:53:17,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 220 SyntacticMatches, 13 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=300, Invalid=3360, Unknown=0, NotChecked=0, Total=3660 [2022-07-20 21:53:17,059 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 98 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:53:17,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 660 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1323 Invalid, 0 Unknown, 34 Unchecked, 0.5s Time] [2022-07-20 21:53:17,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-20 21:53:17,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 117. [2022-07-20 21:53:17,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-20 21:53:17,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2022-07-20 21:53:17,075 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 115 [2022-07-20 21:53:17,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:53:17,075 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2022-07-20 21:53:17,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.8444444444444446) internal successors, (128), 41 states have internal predecessors, (128), 18 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 20 states have call predecessors, (21), 18 states have call successors, (21) [2022-07-20 21:53:17,076 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2022-07-20 21:53:17,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-20 21:53:17,076 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:53:17,076 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:53:17,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-07-20 21:53:17,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-20 21:53:17,287 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:53:17,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:53:17,288 INFO L85 PathProgramCache]: Analyzing trace with hash -707976937, now seen corresponding path program 25 times [2022-07-20 21:53:17,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:53:17,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672705227] [2022-07-20 21:53:17,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:53:17,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:53:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:17,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:53:17,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:17,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:53:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:17,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:53:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:17,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:53:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:17,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:53:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:17,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:53:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:17,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:53:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:17,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:53:17,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:17,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:53:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:17,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:53:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:17,448 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 99 proven. 149 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-20 21:53:17,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:53:17,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672705227] [2022-07-20 21:53:17,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672705227] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:53:17,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675034357] [2022-07-20 21:53:17,449 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:53:17,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:53:17,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:53:17,450 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:53:17,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-20 21:53:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:17,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 21:53:17,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:53:17,746 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-20 21:53:17,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:53:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-20 21:53:17,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675034357] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:53:17,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:53:17,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2022-07-20 21:53:17,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588595824] [2022-07-20 21:53:17,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:53:17,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-20 21:53:17,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:53:17,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-20 21:53:17,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2022-07-20 21:53:17,840 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-07-20 21:53:18,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:53:18,041 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2022-07-20 21:53:18,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-20 21:53:18,042 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 115 [2022-07-20 21:53:18,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:53:18,042 INFO L225 Difference]: With dead ends: 169 [2022-07-20 21:53:18,042 INFO L226 Difference]: Without dead ends: 129 [2022-07-20 21:53:18,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2022-07-20 21:53:18,043 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 141 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:53:18,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 235 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:53:18,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-20 21:53:18,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 112. [2022-07-20 21:53:18,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-20 21:53:18,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2022-07-20 21:53:18,058 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 115 [2022-07-20 21:53:18,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:53:18,059 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2022-07-20 21:53:18,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-07-20 21:53:18,059 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2022-07-20 21:53:18,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-20 21:53:18,059 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:53:18,060 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:53:18,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-20 21:53:18,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:53:18,268 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:53:18,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:53:18,268 INFO L85 PathProgramCache]: Analyzing trace with hash -325453340, now seen corresponding path program 26 times [2022-07-20 21:53:18,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:53:18,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479182002] [2022-07-20 21:53:18,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:53:18,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:53:18,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:18,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:53:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:18,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:53:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:18,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:53:18,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:18,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:53:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:18,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:53:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:18,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:53:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:18,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:53:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:18,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:53:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:18,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:53:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:18,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:53:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:18,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:53:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 27 proven. 278 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-20 21:53:18,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:53:18,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479182002] [2022-07-20 21:53:18,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479182002] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:53:18,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281729830] [2022-07-20 21:53:18,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:53:18,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:53:18,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:53:18,572 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:53:18,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-20 21:53:18,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:53:18,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:53:18,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-20 21:53:18,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:53:19,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:53:21,153 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-20 21:53:21,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-20 21:53:21,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:53:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 61 proven. 278 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-20 21:53:21,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:53:21,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:53:21,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:53:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 27 proven. 278 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-20 21:53:21,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281729830] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:53:21,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:53:21,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 48 [2022-07-20 21:53:21,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842266447] [2022-07-20 21:53:21,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:53:21,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-20 21:53:21,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:53:21,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-20 21:53:21,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2080, Unknown=1, NotChecked=0, Total=2256 [2022-07-20 21:53:21,718 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 44 states have internal predecessors, (137), 19 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2022-07-20 21:53:22,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:53:22,577 INFO L93 Difference]: Finished difference Result 161 states and 165 transitions. [2022-07-20 21:53:22,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-20 21:53:22,577 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 44 states have internal predecessors, (137), 19 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) Word has length 119 [2022-07-20 21:53:22,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:53:22,578 INFO L225 Difference]: With dead ends: 161 [2022-07-20 21:53:22,578 INFO L226 Difference]: Without dead ends: 159 [2022-07-20 21:53:22,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 229 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=318, Invalid=3841, Unknown=1, NotChecked=0, Total=4160 [2022-07-20 21:53:22,580 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 64 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 1846 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 2008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:53:22,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1124 Invalid, 2008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1846 Invalid, 0 Unknown, 113 Unchecked, 0.6s Time] [2022-07-20 21:53:22,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-20 21:53:22,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 125. [2022-07-20 21:53:22,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-20 21:53:22,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2022-07-20 21:53:22,597 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 119 [2022-07-20 21:53:22,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:53:22,597 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2022-07-20 21:53:22,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 44 states have internal predecessors, (137), 19 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2022-07-20 21:53:22,598 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2022-07-20 21:53:22,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-20 21:53:22,598 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:53:22,598 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:53:22,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-20 21:53:22,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:53:22,815 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:53:22,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:53:22,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1033591590, now seen corresponding path program 27 times [2022-07-20 21:53:22,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:53:22,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872154962] [2022-07-20 21:53:22,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:53:22,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:53:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:23,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:53:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:23,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:53:23,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:23,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:53:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:23,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:53:23,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:23,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:53:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:23,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:53:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:23,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:53:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:23,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:53:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:23,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:53:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:23,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:53:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:23,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:53:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:23,160 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 30 proven. 305 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-20 21:53:23,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:53:23,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872154962] [2022-07-20 21:53:23,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872154962] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:53:23,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131835524] [2022-07-20 21:53:23,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:53:23,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:53:23,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:53:23,162 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:53:23,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-20 21:53:23,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-20 21:53:23,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:53:23,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-20 21:53:23,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:53:23,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:53:24,360 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-20 21:53:24,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-07-20 21:53:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 150 proven. 185 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-20 21:53:24,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:53:25,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-20 21:53:25,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-07-20 21:53:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 142 proven. 193 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-20 21:53:25,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131835524] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:53:25,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:53:25,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 75 [2022-07-20 21:53:25,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104018693] [2022-07-20 21:53:25,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:53:25,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-07-20 21:53:25,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:53:25,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-07-20 21:53:25,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=4969, Unknown=0, NotChecked=0, Total=5550 [2022-07-20 21:53:25,601 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 75 states, 74 states have (on average 2.7432432432432434) internal successors, (203), 70 states have internal predecessors, (203), 28 states have call successors, (29), 1 states have call predecessors, (29), 2 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) [2022-07-20 21:53:27,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:53:27,394 INFO L93 Difference]: Finished difference Result 160 states and 164 transitions. [2022-07-20 21:53:27,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-20 21:53:27,394 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 2.7432432432432434) internal successors, (203), 70 states have internal predecessors, (203), 28 states have call successors, (29), 1 states have call predecessors, (29), 2 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) Word has length 123 [2022-07-20 21:53:27,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:53:27,395 INFO L225 Difference]: With dead ends: 160 [2022-07-20 21:53:27,395 INFO L226 Difference]: Without dead ends: 120 [2022-07-20 21:53:27,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4055 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1517, Invalid=13489, Unknown=0, NotChecked=0, Total=15006 [2022-07-20 21:53:27,397 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 81 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:53:27,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 616 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 779 Invalid, 0 Unknown, 241 Unchecked, 0.3s Time] [2022-07-20 21:53:27,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-20 21:53:27,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-07-20 21:53:27,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-20 21:53:27,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2022-07-20 21:53:27,413 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 123 [2022-07-20 21:53:27,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:53:27,413 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2022-07-20 21:53:27,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 2.7432432432432434) internal successors, (203), 70 states have internal predecessors, (203), 28 states have call successors, (29), 1 states have call predecessors, (29), 2 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) [2022-07-20 21:53:27,414 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2022-07-20 21:53:27,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-20 21:53:27,414 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:53:27,414 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:53:27,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-20 21:53:27,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-20 21:53:27,615 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:53:27,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:53:27,615 INFO L85 PathProgramCache]: Analyzing trace with hash -160177113, now seen corresponding path program 28 times [2022-07-20 21:53:27,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:53:27,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638788654] [2022-07-20 21:53:27,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:53:27,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:53:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:27,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:53:27,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:27,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:53:27,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:27,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:53:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:27,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:53:27,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:27,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:53:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:27,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:53:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:27,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:53:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:27,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:53:27,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:27,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:53:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:27,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:53:27,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:27,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:53:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:27,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:53:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:27,955 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 27 proven. 321 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-20 21:53:27,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:53:27,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638788654] [2022-07-20 21:53:27,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638788654] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:53:27,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607245191] [2022-07-20 21:53:27,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:53:27,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:53:27,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:53:27,957 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:53:27,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-20 21:53:28,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:53:28,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:53:28,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-20 21:53:28,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:53:28,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:53:28,491 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:53:28,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:53:28,588 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:53:28,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:53:28,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:53:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 98 proven. 318 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-07-20 21:53:28,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:53:28,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:53:29,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:53:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 27 proven. 320 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-07-20 21:53:29,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607245191] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:53:29,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:53:29,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 49 [2022-07-20 21:53:29,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196551193] [2022-07-20 21:53:29,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:53:29,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-20 21:53:29,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:53:29,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-20 21:53:29,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2170, Unknown=0, NotChecked=0, Total=2352 [2022-07-20 21:53:29,184 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 45 states have internal predecessors, (142), 20 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 22 states have call predecessors, (23), 20 states have call successors, (23) [2022-07-20 21:53:30,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:53:30,037 INFO L93 Difference]: Finished difference Result 134 states and 137 transitions. [2022-07-20 21:53:30,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-20 21:53:30,037 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 45 states have internal predecessors, (142), 20 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 22 states have call predecessors, (23), 20 states have call successors, (23) Word has length 127 [2022-07-20 21:53:30,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:53:30,038 INFO L225 Difference]: With dead ends: 134 [2022-07-20 21:53:30,038 INFO L226 Difference]: Without dead ends: 132 [2022-07-20 21:53:30,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 244 SyntacticMatches, 13 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=324, Invalid=3966, Unknown=0, NotChecked=0, Total=4290 [2022-07-20 21:53:30,038 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 82 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 1935 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:53:30,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 903 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1935 Invalid, 0 Unknown, 38 Unchecked, 0.6s Time] [2022-07-20 21:53:30,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-20 21:53:30,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2022-07-20 21:53:30,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-20 21:53:30,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2022-07-20 21:53:30,056 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 127 [2022-07-20 21:53:30,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:53:30,056 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2022-07-20 21:53:30,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 45 states have internal predecessors, (142), 20 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 22 states have call predecessors, (23), 20 states have call successors, (23) [2022-07-20 21:53:30,056 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2022-07-20 21:53:30,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-20 21:53:30,057 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:53:30,057 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:53:30,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-20 21:53:30,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:53:30,271 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:53:30,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:53:30,272 INFO L85 PathProgramCache]: Analyzing trace with hash 485078429, now seen corresponding path program 29 times [2022-07-20 21:53:30,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:53:30,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449656470] [2022-07-20 21:53:30,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:53:30,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:53:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:30,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:53:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:30,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:53:30,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:30,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:53:30,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:30,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:53:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:30,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:53:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:30,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:53:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:30,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:53:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:30,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:53:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:30,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:53:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:30,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:53:30,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:30,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:53:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:30,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:53:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 30 proven. 348 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-20 21:53:30,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:53:30,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449656470] [2022-07-20 21:53:30,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449656470] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:53:30,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842361281] [2022-07-20 21:53:30,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:53:30,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:53:30,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:53:30,658 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:53:30,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-20 21:53:30,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-20 21:53:30,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:53:30,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-20 21:53:30,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:53:31,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:53:33,295 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-20 21:53:33,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-20 21:53:33,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:53:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 68 proven. 348 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-20 21:53:33,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:53:33,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:53:33,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:53:33,932 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 30 proven. 348 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-20 21:53:33,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842361281] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:53:33,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:53:33,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 52 [2022-07-20 21:53:33,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249743788] [2022-07-20 21:53:33,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:53:33,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-20 21:53:33,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:53:33,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-20 21:53:33,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2460, Unknown=1, NotChecked=0, Total=2652 [2022-07-20 21:53:33,934 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand has 52 states, 52 states have (on average 2.9038461538461537) internal successors, (151), 48 states have internal predecessors, (151), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 23 states have call predecessors, (23), 21 states have call successors, (23) [2022-07-20 21:53:34,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:53:34,714 INFO L93 Difference]: Finished difference Result 172 states and 176 transitions. [2022-07-20 21:53:34,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-20 21:53:34,714 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.9038461538461537) internal successors, (151), 48 states have internal predecessors, (151), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 23 states have call predecessors, (23), 21 states have call successors, (23) Word has length 131 [2022-07-20 21:53:34,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:53:34,715 INFO L225 Difference]: With dead ends: 172 [2022-07-20 21:53:34,715 INFO L226 Difference]: Without dead ends: 170 [2022-07-20 21:53:34,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 260 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=313, Invalid=4108, Unknown=1, NotChecked=0, Total=4422 [2022-07-20 21:53:34,716 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 88 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1646 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:53:34,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 663 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1646 Invalid, 0 Unknown, 81 Unchecked, 0.6s Time] [2022-07-20 21:53:34,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-20 21:53:34,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 137. [2022-07-20 21:53:34,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 112 states have (on average 1.0267857142857142) internal successors, (115), 112 states have internal predecessors, (115), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-20 21:53:34,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 141 transitions. [2022-07-20 21:53:34,736 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 141 transitions. Word has length 131 [2022-07-20 21:53:34,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:53:34,736 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 141 transitions. [2022-07-20 21:53:34,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.9038461538461537) internal successors, (151), 48 states have internal predecessors, (151), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 23 states have call predecessors, (23), 21 states have call successors, (23) [2022-07-20 21:53:34,736 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 141 transitions. [2022-07-20 21:53:34,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-20 21:53:34,737 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:53:34,737 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:53:34,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-20 21:53:34,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:53:34,947 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:53:34,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:53:34,948 INFO L85 PathProgramCache]: Analyzing trace with hash -2003969005, now seen corresponding path program 30 times [2022-07-20 21:53:34,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:53:34,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819079036] [2022-07-20 21:53:34,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:53:34,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:53:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:35,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:53:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:35,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:53:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:35,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:53:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:35,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:53:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:35,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:53:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:35,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:53:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:35,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:53:35,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:35,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:53:35,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:35,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:53:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:35,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:53:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:35,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:53:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:35,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:53:35,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 33 proven. 379 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-20 21:53:35,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:53:35,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819079036] [2022-07-20 21:53:35,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819079036] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:53:35,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742144406] [2022-07-20 21:53:35,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:53:35,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:53:35,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:53:35,314 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:53:35,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-20 21:53:35,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-20 21:53:35,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:53:35,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-20 21:53:35,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:53:35,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:53:36,572 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-20 21:53:36,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-07-20 21:53:36,600 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 186 proven. 226 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-20 21:53:36,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:53:37,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-07-20 21:53:37,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 38 [2022-07-20 21:53:37,874 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 93 proven. 319 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-20 21:53:37,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742144406] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:53:37,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:53:37,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 80 [2022-07-20 21:53:37,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866296405] [2022-07-20 21:53:37,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:53:37,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-20 21:53:37,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:53:37,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-20 21:53:37,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=652, Invalid=5668, Unknown=0, NotChecked=0, Total=6320 [2022-07-20 21:53:37,876 INFO L87 Difference]: Start difference. First operand 137 states and 141 transitions. Second operand has 80 states, 80 states have (on average 2.8) internal successors, (224), 75 states have internal predecessors, (224), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-07-20 21:53:39,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:53:39,978 INFO L93 Difference]: Finished difference Result 176 states and 180 transitions. [2022-07-20 21:53:39,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-20 21:53:39,979 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.8) internal successors, (224), 75 states have internal predecessors, (224), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) Word has length 135 [2022-07-20 21:53:39,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:53:39,980 INFO L225 Difference]: With dead ends: 176 [2022-07-20 21:53:39,980 INFO L226 Difference]: Without dead ends: 132 [2022-07-20 21:53:39,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4792 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1737, Invalid=15819, Unknown=0, NotChecked=0, Total=17556 [2022-07-20 21:53:39,981 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 76 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:53:39,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 1072 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1070 Invalid, 0 Unknown, 239 Unchecked, 0.4s Time] [2022-07-20 21:53:39,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-20 21:53:39,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-07-20 21:53:39,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-20 21:53:40,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2022-07-20 21:53:40,000 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 135 [2022-07-20 21:53:40,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:53:40,000 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2022-07-20 21:53:40,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.8) internal successors, (224), 75 states have internal predecessors, (224), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-07-20 21:53:40,000 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2022-07-20 21:53:40,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-07-20 21:53:40,001 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:53:40,001 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 11, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:53:40,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-07-20 21:53:40,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-20 21:53:40,202 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:53:40,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:53:40,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1501516640, now seen corresponding path program 31 times [2022-07-20 21:53:40,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:53:40,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735067007] [2022-07-20 21:53:40,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:53:40,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:53:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:40,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:53:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:40,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:53:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:40,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:53:40,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:40,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:53:40,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:40,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:53:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:40,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:53:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:40,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:53:40,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:40,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:53:40,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:40,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:53:40,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:40,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:53:40,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:40,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:53:40,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:40,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:53:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:40,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:53:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:40,593 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 30 proven. 395 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-20 21:53:40,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:53:40,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735067007] [2022-07-20 21:53:40,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735067007] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:53:40,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717027468] [2022-07-20 21:53:40,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:53:40,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:53:40,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:53:40,595 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:53:40,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-20 21:53:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:40,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-20 21:53:40,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:53:41,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:53:41,152 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:53:41,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:53:41,242 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:53:41,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:53:41,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:53:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 109 proven. 392 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-07-20 21:53:41,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:53:41,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:53:41,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:53:41,915 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 30 proven. 394 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-07-20 21:53:41,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717027468] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:53:41,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:53:41,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 53 [2022-07-20 21:53:41,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890688650] [2022-07-20 21:53:41,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:53:41,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-20 21:53:41,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:53:41,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-20 21:53:41,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2558, Unknown=0, NotChecked=0, Total=2756 [2022-07-20 21:53:41,918 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand has 53 states, 53 states have (on average 2.943396226415094) internal successors, (156), 49 states have internal predecessors, (156), 22 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (25), 24 states have call predecessors, (25), 22 states have call successors, (25) [2022-07-20 21:53:42,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:53:42,762 INFO L93 Difference]: Finished difference Result 141 states and 144 transitions. [2022-07-20 21:53:42,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-20 21:53:42,763 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.943396226415094) internal successors, (156), 49 states have internal predecessors, (156), 22 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (25), 24 states have call predecessors, (25), 22 states have call successors, (25) Word has length 139 [2022-07-20 21:53:42,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:53:42,763 INFO L225 Difference]: With dead ends: 141 [2022-07-20 21:53:42,763 INFO L226 Difference]: Without dead ends: 139 [2022-07-20 21:53:42,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 276 SyntacticMatches, 13 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1469 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=310, Invalid=4112, Unknown=0, NotChecked=0, Total=4422 [2022-07-20 21:53:42,764 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 99 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 1918 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 2044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:53:42,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 1004 Invalid, 2044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1918 Invalid, 0 Unknown, 88 Unchecked, 0.6s Time] [2022-07-20 21:53:42,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-20 21:53:42,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2022-07-20 21:53:42,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-20 21:53:42,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 139 transitions. [2022-07-20 21:53:42,783 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 139 transitions. Word has length 139 [2022-07-20 21:53:42,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:53:42,783 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 139 transitions. [2022-07-20 21:53:42,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.943396226415094) internal successors, (156), 49 states have internal predecessors, (156), 22 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (25), 24 states have call predecessors, (25), 22 states have call successors, (25) [2022-07-20 21:53:42,784 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 139 transitions. [2022-07-20 21:53:42,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-20 21:53:42,784 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:53:42,784 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:53:42,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-07-20 21:53:42,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-20 21:53:42,985 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:53:42,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:53:42,985 INFO L85 PathProgramCache]: Analyzing trace with hash 566812758, now seen corresponding path program 32 times [2022-07-20 21:53:42,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:53:42,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130922640] [2022-07-20 21:53:42,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:53:42,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:53:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:43,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:53:43,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:43,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:53:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:43,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:53:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:43,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:53:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:43,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:53:43,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:43,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:53:43,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:43,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:53:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:43,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:53:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:43,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:53:43,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:43,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:53:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:43,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:53:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:43,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:53:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:43,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:53:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:43,361 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 33 proven. 426 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-20 21:53:43,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:53:43,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130922640] [2022-07-20 21:53:43,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130922640] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:53:43,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295472569] [2022-07-20 21:53:43,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:53:43,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:53:43,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:53:43,363 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:53:43,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-20 21:53:43,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:53:43,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:53:43,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-20 21:53:43,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:53:43,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:53:48,072 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-20 21:53:48,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-20 21:53:48,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:53:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 75 proven. 426 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-20 21:53:48,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:53:48,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:53:48,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:53:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 33 proven. 426 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-20 21:53:48,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295472569] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:53:48,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:53:48,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 56 [2022-07-20 21:53:48,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200570485] [2022-07-20 21:53:48,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:53:48,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-20 21:53:48,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:53:48,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-20 21:53:48,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2871, Unknown=2, NotChecked=0, Total=3080 [2022-07-20 21:53:48,776 INFO L87 Difference]: Start difference. First operand 136 states and 139 transitions. Second operand has 56 states, 56 states have (on average 2.9464285714285716) internal successors, (165), 52 states have internal predecessors, (165), 23 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (25), 25 states have call predecessors, (25), 23 states have call successors, (25) [2022-07-20 21:53:51,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:53:51,562 INFO L93 Difference]: Finished difference Result 188 states and 192 transitions. [2022-07-20 21:53:51,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-20 21:53:51,563 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.9464285714285716) internal successors, (165), 52 states have internal predecessors, (165), 23 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (25), 25 states have call predecessors, (25), 23 states have call successors, (25) Word has length 143 [2022-07-20 21:53:51,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:53:51,563 INFO L225 Difference]: With dead ends: 188 [2022-07-20 21:53:51,564 INFO L226 Difference]: Without dead ends: 186 [2022-07-20 21:53:51,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 285 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=332, Invalid=4777, Unknown=3, NotChecked=0, Total=5112 [2022-07-20 21:53:51,564 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 110 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:53:51,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 1146 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1693 Invalid, 0 Unknown, 98 Unchecked, 0.5s Time] [2022-07-20 21:53:51,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-07-20 21:53:51,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 149. [2022-07-20 21:53:51,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 14 states have call successors, (14), 12 states have call predecessors, (14), 12 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-20 21:53:51,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 153 transitions. [2022-07-20 21:53:51,588 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 153 transitions. Word has length 143 [2022-07-20 21:53:51,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:53:51,588 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 153 transitions. [2022-07-20 21:53:51,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.9464285714285716) internal successors, (165), 52 states have internal predecessors, (165), 23 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (25), 25 states have call predecessors, (25), 23 states have call successors, (25) [2022-07-20 21:53:51,588 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 153 transitions. [2022-07-20 21:53:51,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-20 21:53:51,589 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:53:51,589 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:53:51,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-07-20 21:53:51,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-20 21:53:51,806 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:53:51,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:53:51,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1610023500, now seen corresponding path program 33 times [2022-07-20 21:53:51,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:53:51,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108527318] [2022-07-20 21:53:51,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:53:51,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:53:51,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:52,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:53:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:52,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:53:52,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:52,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:53:52,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:52,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:53:52,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:52,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:53:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:52,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:53:52,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:52,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:53:52,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:52,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:53:52,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:52,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:53:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:52,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:53:52,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:52,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:53:52,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:52,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:53:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:52,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:53:52,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 36 proven. 461 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-20 21:53:52,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:53:52,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108527318] [2022-07-20 21:53:52,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108527318] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:53:52,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094390492] [2022-07-20 21:53:52,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:53:52,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:53:52,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:53:52,209 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:53:52,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-20 21:53:52,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-07-20 21:53:52,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:53:52,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-20 21:53:52,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:53:52,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:53:53,625 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-20 21:53:53,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-07-20 21:53:53,658 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 226 proven. 271 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-20 21:53:53,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:53:54,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-20 21:53:54,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-07-20 21:53:55,195 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 216 proven. 281 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-20 21:53:55,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094390492] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:53:55,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:53:55,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 32] total 86 [2022-07-20 21:53:55,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156758616] [2022-07-20 21:53:55,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:53:55,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-07-20 21:53:55,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:53:55,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-07-20 21:53:55,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=769, Invalid=6541, Unknown=0, NotChecked=0, Total=7310 [2022-07-20 21:53:55,198 INFO L87 Difference]: Start difference. First operand 149 states and 153 transitions. Second operand has 86 states, 86 states have (on average 2.8488372093023258) internal successors, (245), 81 states have internal predecessors, (245), 34 states have call successors, (35), 1 states have call predecessors, (35), 2 states have return successors, (36), 36 states have call predecessors, (36), 34 states have call successors, (36) [2022-07-20 21:53:57,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:53:57,604 INFO L93 Difference]: Finished difference Result 192 states and 196 transitions. [2022-07-20 21:53:57,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-20 21:53:57,605 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.8488372093023258) internal successors, (245), 81 states have internal predecessors, (245), 34 states have call successors, (35), 1 states have call predecessors, (35), 2 states have return successors, (36), 36 states have call predecessors, (36), 34 states have call successors, (36) Word has length 147 [2022-07-20 21:53:57,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:53:57,605 INFO L225 Difference]: With dead ends: 192 [2022-07-20 21:53:57,605 INFO L226 Difference]: Without dead ends: 144 [2022-07-20 21:53:57,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 285 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5628 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2016, Invalid=18576, Unknown=0, NotChecked=0, Total=20592 [2022-07-20 21:53:57,607 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 106 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:53:57,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 1154 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1089 Invalid, 0 Unknown, 275 Unchecked, 0.4s Time] [2022-07-20 21:53:57,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-20 21:53:57,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-07-20 21:53:57,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 14 states have call successors, (14), 12 states have call predecessors, (14), 12 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-20 21:53:57,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 147 transitions. [2022-07-20 21:53:57,644 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 147 transitions. Word has length 147 [2022-07-20 21:53:57,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:53:57,645 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 147 transitions. [2022-07-20 21:53:57,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.8488372093023258) internal successors, (245), 81 states have internal predecessors, (245), 34 states have call successors, (35), 1 states have call predecessors, (35), 2 states have return successors, (36), 36 states have call predecessors, (36), 34 states have call successors, (36) [2022-07-20 21:53:57,645 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 147 transitions. [2022-07-20 21:53:57,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-20 21:53:57,646 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:53:57,646 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 12, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:53:57,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-20 21:53:57,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:53:57,864 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:53:57,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:53:57,864 INFO L85 PathProgramCache]: Analyzing trace with hash 799601049, now seen corresponding path program 34 times [2022-07-20 21:53:57,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:53:57,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645316915] [2022-07-20 21:53:57,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:53:57,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:53:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:58,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:53:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:58,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:53:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:58,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:53:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:58,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:53:58,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:58,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:53:58,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:58,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:53:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:58,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:53:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:58,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:53:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:58,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:53:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:58,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:53:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:58,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:53:58,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:58,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:53:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:58,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:53:58,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:58,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-20 21:53:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:53:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 33 proven. 477 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-07-20 21:53:58,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:53:58,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645316915] [2022-07-20 21:53:58,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645316915] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:53:58,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958176331] [2022-07-20 21:53:58,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:53:58,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:53:58,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:53:58,271 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:53:58,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-20 21:53:58,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:53:58,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:53:58,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-20 21:53:58,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:53:58,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:53:58,930 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:53:58,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:53:59,029 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:53:59,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:53:59,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:53:59,359 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 120 proven. 474 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-07-20 21:53:59,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:53:59,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:53:59,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:53:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 33 proven. 476 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2022-07-20 21:53:59,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958176331] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:53:59,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:53:59,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 57 [2022-07-20 21:53:59,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309258415] [2022-07-20 21:53:59,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:53:59,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-20 21:53:59,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:53:59,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-20 21:53:59,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2978, Unknown=0, NotChecked=0, Total=3192 [2022-07-20 21:53:59,804 INFO L87 Difference]: Start difference. First operand 144 states and 147 transitions. Second operand has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 53 states have internal predecessors, (170), 24 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 26 states have call predecessors, (27), 24 states have call successors, (27) [2022-07-20 21:54:00,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:54:00,871 INFO L93 Difference]: Finished difference Result 158 states and 161 transitions. [2022-07-20 21:54:00,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-20 21:54:00,872 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 53 states have internal predecessors, (170), 24 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 26 states have call predecessors, (27), 24 states have call successors, (27) Word has length 151 [2022-07-20 21:54:00,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:54:00,873 INFO L225 Difference]: With dead ends: 158 [2022-07-20 21:54:00,873 INFO L226 Difference]: Without dead ends: 156 [2022-07-20 21:54:00,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 292 SyntacticMatches, 13 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1876 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=372, Invalid=5328, Unknown=0, NotChecked=0, Total=5700 [2022-07-20 21:54:00,873 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 109 mSDsluCounter, 1293 mSDsCounter, 0 mSdLazyCounter, 2425 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 2573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 21:54:00,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1343 Invalid, 2573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2425 Invalid, 0 Unknown, 47 Unchecked, 0.8s Time] [2022-07-20 21:54:00,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-20 21:54:00,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 148. [2022-07-20 21:54:00,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 121 states have internal predecessors, (123), 14 states have call successors, (14), 12 states have call predecessors, (14), 12 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-20 21:54:00,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 151 transitions. [2022-07-20 21:54:00,897 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 151 transitions. Word has length 151 [2022-07-20 21:54:00,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:54:00,897 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 151 transitions. [2022-07-20 21:54:00,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 53 states have internal predecessors, (170), 24 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 26 states have call predecessors, (27), 24 states have call successors, (27) [2022-07-20 21:54:00,897 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 151 transitions. [2022-07-20 21:54:00,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-07-20 21:54:00,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:54:00,898 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:54:00,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-20 21:54:01,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-20 21:54:01,099 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:54:01,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:54:01,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1897314831, now seen corresponding path program 35 times [2022-07-20 21:54:01,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:54:01,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421075461] [2022-07-20 21:54:01,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:54:01,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:54:01,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:01,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:54:01,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:01,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:54:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:01,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:54:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:01,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:54:01,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:01,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:54:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:01,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:54:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:01,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:54:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:01,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:54:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:01,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:54:01,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:01,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:54:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:01,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:54:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:01,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:54:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:01,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:54:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:01,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-20 21:54:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:01,537 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 36 proven. 512 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-07-20 21:54:01,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:54:01,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421075461] [2022-07-20 21:54:01,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421075461] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:54:01,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434355800] [2022-07-20 21:54:01,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:54:01,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:54:01,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:54:01,539 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:54:01,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-20 21:54:01,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-07-20 21:54:01,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:54:01,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-20 21:54:01,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:54:02,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:54:04,347 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-20 21:54:04,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-20 21:54:04,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:54:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 82 proven. 512 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-20 21:54:04,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:54:04,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:54:04,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:54:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 36 proven. 512 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-07-20 21:54:05,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434355800] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:54:05,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:54:05,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 60 [2022-07-20 21:54:05,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407328796] [2022-07-20 21:54:05,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:54:05,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-20 21:54:05,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:54:05,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-20 21:54:05,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=3316, Unknown=1, NotChecked=0, Total=3540 [2022-07-20 21:54:05,113 INFO L87 Difference]: Start difference. First operand 148 states and 151 transitions. Second operand has 60 states, 60 states have (on average 2.9833333333333334) internal successors, (179), 56 states have internal predecessors, (179), 25 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) [2022-07-20 21:54:06,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:54:06,201 INFO L93 Difference]: Finished difference Result 209 states and 213 transitions. [2022-07-20 21:54:06,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-20 21:54:06,201 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.9833333333333334) internal successors, (179), 56 states have internal predecessors, (179), 25 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) Word has length 155 [2022-07-20 21:54:06,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:54:06,202 INFO L225 Difference]: With dead ends: 209 [2022-07-20 21:54:06,202 INFO L226 Difference]: Without dead ends: 207 [2022-07-20 21:54:06,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 310 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=390, Invalid=5929, Unknown=1, NotChecked=0, Total=6320 [2022-07-20 21:54:06,203 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 109 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 2425 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 2669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 21:54:06,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1327 Invalid, 2669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2425 Invalid, 0 Unknown, 185 Unchecked, 0.8s Time] [2022-07-20 21:54:06,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-07-20 21:54:06,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 161. [2022-07-20 21:54:06,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 132 states have (on average 1.0227272727272727) internal successors, (135), 132 states have internal predecessors, (135), 15 states have call successors, (15), 13 states have call predecessors, (15), 13 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-20 21:54:06,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 165 transitions. [2022-07-20 21:54:06,228 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 165 transitions. Word has length 155 [2022-07-20 21:54:06,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:54:06,229 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 165 transitions. [2022-07-20 21:54:06,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.9833333333333334) internal successors, (179), 56 states have internal predecessors, (179), 25 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) [2022-07-20 21:54:06,229 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 165 transitions. [2022-07-20 21:54:06,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-20 21:54:06,230 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:54:06,230 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:54:06,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-20 21:54:06,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-20 21:54:06,449 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:54:06,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:54:06,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1021269893, now seen corresponding path program 36 times [2022-07-20 21:54:06,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:54:06,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592194307] [2022-07-20 21:54:06,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:54:06,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:54:06,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:07,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:54:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:07,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:54:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:07,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:54:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:07,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:54:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:07,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:54:07,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:07,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:54:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:07,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:54:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:07,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:54:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:07,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:54:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:07,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:54:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:07,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:54:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:07,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:54:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:07,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:54:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:07,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-20 21:54:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 39 proven. 551 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-07-20 21:54:07,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:54:07,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592194307] [2022-07-20 21:54:07,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592194307] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:54:07,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912235127] [2022-07-20 21:54:07,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:54:07,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:54:07,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:54:07,091 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:54:07,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-20 21:54:07,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-07-20 21:54:07,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:54:07,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-20 21:54:07,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:54:07,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:54:09,137 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_61| Int) (|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_482| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_61| Int)) (and (< |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_482| (select (select |c_#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_61|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_61| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_482| 4) (- 4)))) (<= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_482| 12))) is different from true [2022-07-20 21:54:14,926 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:54:14,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-07-20 21:54:15,866 INFO L356 Elim1Store]: treesize reduction 50, result has 5.7 percent of original size [2022-07-20 21:54:15,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 15 [2022-07-20 21:54:15,898 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 319 proven. 317 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-20 21:54:15,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:54:22,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912235127] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:54:22,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:54:22,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 39] total 69 [2022-07-20 21:54:22,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785672335] [2022-07-20 21:54:22,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:54:22,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-07-20 21:54:22,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:54:22,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-07-20 21:54:22,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=6452, Unknown=9, NotChecked=166, Total=7310 [2022-07-20 21:54:22,751 INFO L87 Difference]: Start difference. First operand 161 states and 165 transitions. Second operand has 69 states, 67 states have (on average 2.746268656716418) internal successors, (184), 63 states have internal predecessors, (184), 26 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (27), 27 states have call predecessors, (27), 26 states have call successors, (27) [2022-07-20 21:54:27,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:54:27,402 INFO L93 Difference]: Finished difference Result 225 states and 230 transitions. [2022-07-20 21:54:27,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-07-20 21:54:27,403 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 67 states have (on average 2.746268656716418) internal successors, (184), 63 states have internal predecessors, (184), 26 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (27), 27 states have call predecessors, (27), 26 states have call successors, (27) Word has length 159 [2022-07-20 21:54:27,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:54:27,403 INFO L225 Difference]: With dead ends: 225 [2022-07-20 21:54:27,403 INFO L226 Difference]: Without dead ends: 173 [2022-07-20 21:54:27,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 210 SyntacticMatches, 2 SemanticMatches, 172 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9451 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=2493, Invalid=27258, Unknown=9, NotChecked=342, Total=30102 [2022-07-20 21:54:27,405 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 255 mSDsluCounter, 1979 mSDsCounter, 0 mSdLazyCounter, 2353 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 2053 SdHoareTripleChecker+Invalid, 3078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 2353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 442 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:54:27,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 2053 Invalid, 3078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 2353 Invalid, 0 Unknown, 442 Unchecked, 1.0s Time] [2022-07-20 21:54:27,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-20 21:54:27,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 156. [2022-07-20 21:54:27,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 15 states have call successors, (15), 13 states have call predecessors, (15), 13 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-20 21:54:27,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 159 transitions. [2022-07-20 21:54:27,433 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 159 transitions. Word has length 159 [2022-07-20 21:54:27,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:54:27,433 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 159 transitions. [2022-07-20 21:54:27,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 67 states have (on average 2.746268656716418) internal successors, (184), 63 states have internal predecessors, (184), 26 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (27), 27 states have call predecessors, (27), 26 states have call successors, (27) [2022-07-20 21:54:27,434 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 159 transitions. [2022-07-20 21:54:27,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-20 21:54:27,434 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:54:27,434 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 13, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:54:27,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-20 21:54:27,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:54:27,647 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:54:27,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:54:27,648 INFO L85 PathProgramCache]: Analyzing trace with hash -827326766, now seen corresponding path program 37 times [2022-07-20 21:54:27,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:54:27,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632347689] [2022-07-20 21:54:27,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:54:27,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:54:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:28,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:54:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:28,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:54:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:28,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:54:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:28,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:54:28,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:28,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:54:28,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:28,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:54:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:28,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:54:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:28,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:54:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:28,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:54:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:28,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:54:28,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:28,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:54:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:28,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:54:28,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:28,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:54:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:28,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-20 21:54:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:28,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-20 21:54:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:28,134 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 36 proven. 567 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-07-20 21:54:28,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:54:28,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632347689] [2022-07-20 21:54:28,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632347689] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:54:28,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310507196] [2022-07-20 21:54:28,134 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:54:28,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:54:28,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:54:28,136 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:54:28,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-20 21:54:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:28,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-20 21:54:28,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:54:28,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:54:28,855 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:54:28,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:54:28,959 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:54:28,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:54:29,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:54:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 131 proven. 564 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-07-20 21:54:29,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:54:29,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:54:29,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:54:29,773 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 36 proven. 566 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-07-20 21:54:29,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310507196] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:54:29,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:54:29,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 61 [2022-07-20 21:54:29,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102397324] [2022-07-20 21:54:29,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:54:29,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-20 21:54:29,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:54:29,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-20 21:54:29,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3430, Unknown=0, NotChecked=0, Total=3660 [2022-07-20 21:54:29,775 INFO L87 Difference]: Start difference. First operand 156 states and 159 transitions. Second operand has 61 states, 61 states have (on average 3.0163934426229506) internal successors, (184), 57 states have internal predecessors, (184), 26 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (29), 28 states have call predecessors, (29), 26 states have call successors, (29) [2022-07-20 21:54:31,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:54:31,153 INFO L93 Difference]: Finished difference Result 170 states and 173 transitions. [2022-07-20 21:54:31,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-20 21:54:31,153 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.0163934426229506) internal successors, (184), 57 states have internal predecessors, (184), 26 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (29), 28 states have call predecessors, (29), 26 states have call successors, (29) Word has length 163 [2022-07-20 21:54:31,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:54:31,164 INFO L225 Difference]: With dead ends: 170 [2022-07-20 21:54:31,164 INFO L226 Difference]: Without dead ends: 168 [2022-07-20 21:54:31,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 317 SyntacticMatches, 13 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=396, Invalid=6084, Unknown=0, NotChecked=0, Total=6480 [2022-07-20 21:54:31,164 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 127 mSDsluCounter, 1675 mSDsCounter, 0 mSdLazyCounter, 3296 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1728 SdHoareTripleChecker+Invalid, 3501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 3296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:54:31,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 1728 Invalid, 3501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 3296 Invalid, 0 Unknown, 88 Unchecked, 1.1s Time] [2022-07-20 21:54:31,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-20 21:54:31,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 160. [2022-07-20 21:54:31,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 15 states have call successors, (15), 13 states have call predecessors, (15), 13 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-20 21:54:31,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 163 transitions. [2022-07-20 21:54:31,191 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 163 transitions. Word has length 163 [2022-07-20 21:54:31,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:54:31,192 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 163 transitions. [2022-07-20 21:54:31,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.0163934426229506) internal successors, (184), 57 states have internal predecessors, (184), 26 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (29), 28 states have call predecessors, (29), 26 states have call successors, (29) [2022-07-20 21:54:31,192 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 163 transitions. [2022-07-20 21:54:31,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-07-20 21:54:31,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:54:31,193 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 13, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:54:31,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-20 21:54:31,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-07-20 21:54:31,411 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:54:31,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:54:31,411 INFO L85 PathProgramCache]: Analyzing trace with hash -286096696, now seen corresponding path program 38 times [2022-07-20 21:54:31,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:54:31,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809360604] [2022-07-20 21:54:31,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:54:31,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:54:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:32,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:54:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:32,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:54:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:32,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:54:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:32,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:54:32,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:32,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:54:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:32,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:54:32,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:32,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:54:32,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:32,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:54:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:32,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:54:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:32,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:54:32,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:32,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:54:32,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:32,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:54:32,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:32,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:54:32,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:32,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-20 21:54:32,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:32,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-20 21:54:32,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:32,138 INFO L134 CoverageAnalysis]: Checked inductivity of 987 backedges. 39 proven. 606 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-07-20 21:54:32,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:54:32,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809360604] [2022-07-20 21:54:32,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809360604] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:54:32,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474914554] [2022-07-20 21:54:32,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:54:32,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:54:32,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:54:32,140 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:54:32,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-20 21:54:32,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:54:32,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:54:32,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-20 21:54:32,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:54:32,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:54:32,826 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:54:32,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:54:33,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:54:33,260 INFO L134 CoverageAnalysis]: Checked inductivity of 987 backedges. 89 proven. 606 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-07-20 21:54:33,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:54:33,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474914554] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:54:33,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:54:33,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34] total 66 [2022-07-20 21:54:33,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542509036] [2022-07-20 21:54:33,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:54:33,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-20 21:54:33,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:54:33,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-20 21:54:33,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=5806, Unknown=0, NotChecked=0, Total=6162 [2022-07-20 21:54:33,725 INFO L87 Difference]: Start difference. First operand 160 states and 163 transitions. Second operand has 66 states, 64 states have (on average 2.96875) internal successors, (190), 62 states have internal predecessors, (190), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) [2022-07-20 21:54:36,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:54:36,005 INFO L93 Difference]: Finished difference Result 233 states and 238 transitions. [2022-07-20 21:54:36,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-20 21:54:36,005 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 64 states have (on average 2.96875) internal successors, (190), 62 states have internal predecessors, (190), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) Word has length 167 [2022-07-20 21:54:36,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:54:36,006 INFO L225 Difference]: With dead ends: 233 [2022-07-20 21:54:36,006 INFO L226 Difference]: Without dead ends: 231 [2022-07-20 21:54:36,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 215 SyntacticMatches, 4 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4609 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=756, Invalid=12584, Unknown=0, NotChecked=0, Total=13340 [2022-07-20 21:54:36,008 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 225 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 3704 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 1654 SdHoareTripleChecker+Invalid, 3893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 3704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:54:36,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 1654 Invalid, 3893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 3704 Invalid, 0 Unknown, 82 Unchecked, 1.2s Time] [2022-07-20 21:54:36,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-20 21:54:36,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 173. [2022-07-20 21:54:36,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 142 states have (on average 1.0211267605633803) internal successors, (145), 142 states have internal predecessors, (145), 16 states have call successors, (16), 14 states have call predecessors, (16), 14 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-20 21:54:36,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 177 transitions. [2022-07-20 21:54:36,042 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 177 transitions. Word has length 167 [2022-07-20 21:54:36,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:54:36,044 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 177 transitions. [2022-07-20 21:54:36,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 64 states have (on average 2.96875) internal successors, (190), 62 states have internal predecessors, (190), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) [2022-07-20 21:54:36,044 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 177 transitions. [2022-07-20 21:54:36,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-07-20 21:54:36,045 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:54:36,045 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:54:36,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-20 21:54:36,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:54:36,260 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:54:36,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:54:36,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1640373182, now seen corresponding path program 39 times [2022-07-20 21:54:36,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:54:36,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887621856] [2022-07-20 21:54:36,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:54:36,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:54:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:36,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:54:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:36,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:54:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:36,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:54:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:36,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:54:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:36,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:54:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:36,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:54:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:36,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:54:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:36,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:54:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:36,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:54:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:36,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:54:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:36,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:54:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:36,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:54:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:36,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:54:36,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:36,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-20 21:54:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:36,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-20 21:54:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:36,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 42 proven. 649 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-07-20 21:54:36,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:54:36,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887621856] [2022-07-20 21:54:36,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887621856] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:54:36,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010007790] [2022-07-20 21:54:36,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:54:36,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:54:36,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:54:36,783 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:54:36,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-20 21:54:37,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-07-20 21:54:37,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:54:37,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-20 21:54:37,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:54:37,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:54:38,669 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-07-20 21:54:38,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-07-20 21:54:38,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 42 proven. 649 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-07-20 21:54:38,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:54:39,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:54:39,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:54:39,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010007790] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:54:39,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:54:39,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36] total 66 [2022-07-20 21:54:39,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534054109] [2022-07-20 21:54:39,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:54:39,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-20 21:54:39,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:54:39,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-20 21:54:39,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=6395, Unknown=0, NotChecked=0, Total=6972 [2022-07-20 21:54:39,570 INFO L87 Difference]: Start difference. First operand 173 states and 177 transitions. Second operand has 66 states, 66 states have (on average 2.9393939393939394) internal successors, (194), 62 states have internal predecessors, (194), 27 states have call successors, (28), 1 states have call predecessors, (28), 2 states have return successors, (29), 29 states have call predecessors, (29), 27 states have call successors, (29) [2022-07-20 21:54:40,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:54:40,313 INFO L93 Difference]: Finished difference Result 223 states and 227 transitions. [2022-07-20 21:54:40,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-20 21:54:40,314 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.9393939393939394) internal successors, (194), 62 states have internal predecessors, (194), 27 states have call successors, (28), 1 states have call predecessors, (28), 2 states have return successors, (29), 29 states have call predecessors, (29), 27 states have call successors, (29) Word has length 171 [2022-07-20 21:54:40,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:54:40,315 INFO L225 Difference]: With dead ends: 223 [2022-07-20 21:54:40,315 INFO L226 Difference]: Without dead ends: 221 [2022-07-20 21:54:40,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 207 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2305 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=609, Invalid=6873, Unknown=0, NotChecked=0, Total=7482 [2022-07-20 21:54:40,316 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 109 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 1795 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 2071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:54:40,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1124 Invalid, 2071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1795 Invalid, 0 Unknown, 222 Unchecked, 0.6s Time] [2022-07-20 21:54:40,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-20 21:54:40,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 177. [2022-07-20 21:54:40,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 16 states have call successors, (16), 14 states have call predecessors, (16), 14 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-20 21:54:40,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2022-07-20 21:54:40,352 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 171 [2022-07-20 21:54:40,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:54:40,352 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2022-07-20 21:54:40,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.9393939393939394) internal successors, (194), 62 states have internal predecessors, (194), 27 states have call successors, (28), 1 states have call predecessors, (28), 2 states have return successors, (29), 29 states have call predecessors, (29), 27 states have call successors, (29) [2022-07-20 21:54:40,353 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2022-07-20 21:54:40,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-07-20 21:54:40,353 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:54:40,353 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 14, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:54:40,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-20 21:54:40,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:54:40,567 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:54:40,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:54:40,568 INFO L85 PathProgramCache]: Analyzing trace with hash 714324747, now seen corresponding path program 40 times [2022-07-20 21:54:40,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:54:40,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026247286] [2022-07-20 21:54:40,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:54:40,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:54:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:41,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:54:41,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:41,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:54:41,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:41,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:54:41,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:41,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:54:41,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:41,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:54:41,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:41,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:54:41,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:41,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:54:41,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:41,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:54:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:41,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:54:41,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:41,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:54:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:41,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:54:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:41,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:54:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:41,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:54:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:41,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-20 21:54:41,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:41,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-20 21:54:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:41,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-20 21:54:41,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 39 proven. 665 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-20 21:54:41,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:54:41,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026247286] [2022-07-20 21:54:41,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026247286] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:54:41,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381632311] [2022-07-20 21:54:41,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:54:41,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:54:41,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:54:41,239 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:54:41,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-20 21:54:41,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:54:41,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:54:41,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-20 21:54:41,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:54:41,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:54:41,987 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:54:41,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:54:42,082 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:54:42,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:54:42,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:54:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 142 proven. 662 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-07-20 21:54:42,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:54:42,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381632311] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:54:42,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:54:42,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 67 [2022-07-20 21:54:42,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377609437] [2022-07-20 21:54:42,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:54:42,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-20 21:54:42,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:54:42,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-20 21:54:42,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=5953, Unknown=0, NotChecked=0, Total=6320 [2022-07-20 21:54:42,974 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand has 67 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 63 states have internal predecessors, (196), 30 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) [2022-07-20 21:54:45,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:54:45,227 INFO L93 Difference]: Finished difference Result 233 states and 237 transitions. [2022-07-20 21:54:45,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-20 21:54:45,227 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 63 states have internal predecessors, (196), 30 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) Word has length 175 [2022-07-20 21:54:45,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:54:45,228 INFO L225 Difference]: With dead ends: 233 [2022-07-20 21:54:45,228 INFO L226 Difference]: Without dead ends: 231 [2022-07-20 21:54:45,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 212 SyntacticMatches, 6 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4758 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=731, Invalid=12609, Unknown=0, NotChecked=0, Total=13340 [2022-07-20 21:54:45,229 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 177 mSDsluCounter, 1479 mSDsCounter, 0 mSdLazyCounter, 3677 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1533 SdHoareTripleChecker+Invalid, 3917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 3677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:54:45,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 1533 Invalid, 3917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 3677 Invalid, 0 Unknown, 78 Unchecked, 1.2s Time] [2022-07-20 21:54:45,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-20 21:54:45,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 177. [2022-07-20 21:54:45,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 16 states have call successors, (16), 14 states have call predecessors, (16), 14 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-20 21:54:45,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2022-07-20 21:54:45,262 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 175 [2022-07-20 21:54:45,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:54:45,263 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2022-07-20 21:54:45,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 63 states have internal predecessors, (196), 30 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) [2022-07-20 21:54:45,263 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2022-07-20 21:54:45,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-07-20 21:54:45,264 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:54:45,264 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:54:45,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-20 21:54:45,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-20 21:54:45,475 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:54:45,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:54:45,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1634186828, now seen corresponding path program 41 times [2022-07-20 21:54:45,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:54:45,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005961978] [2022-07-20 21:54:45,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:54:45,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:54:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:45,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:54:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:45,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:54:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:45,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:54:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:45,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:54:45,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:45,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:54:45,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:45,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:54:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:45,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:54:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:45,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:54:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:45,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:54:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:45,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:54:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:45,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:54:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:45,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:54:45,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:45,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:54:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:45,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-20 21:54:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:45,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-20 21:54:45,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:45,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 289 proven. 374 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-07-20 21:54:45,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:54:45,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005961978] [2022-07-20 21:54:45,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005961978] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:54:45,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157723039] [2022-07-20 21:54:45,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:54:45,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:54:45,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:54:45,753 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:54:45,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-20 21:54:45,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-07-20 21:54:45,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:54:45,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-20 21:54:45,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:54:46,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 338 proven. 325 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-07-20 21:54:46,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:54:46,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 338 proven. 325 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-07-20 21:54:46,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157723039] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:54:46,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:54:46,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2022-07-20 21:54:46,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310464956] [2022-07-20 21:54:46,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:54:46,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-20 21:54:46,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:54:46,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-20 21:54:46,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2022-07-20 21:54:46,503 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand has 47 states, 47 states have (on average 3.5319148936170213) internal successors, (166), 47 states have internal predecessors, (166), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-07-20 21:54:46,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:54:46,884 INFO L93 Difference]: Finished difference Result 249 states and 254 transitions. [2022-07-20 21:54:46,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-20 21:54:46,884 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.5319148936170213) internal successors, (166), 47 states have internal predecessors, (166), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 175 [2022-07-20 21:54:46,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:54:46,887 INFO L225 Difference]: With dead ends: 249 [2022-07-20 21:54:46,887 INFO L226 Difference]: Without dead ends: 189 [2022-07-20 21:54:46,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 363 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=872, Invalid=2788, Unknown=0, NotChecked=0, Total=3660 [2022-07-20 21:54:46,888 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 324 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:54:46,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 353 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:54:46,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-07-20 21:54:46,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 172. [2022-07-20 21:54:46,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 16 states have call successors, (16), 14 states have call predecessors, (16), 14 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-20 21:54:46,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 175 transitions. [2022-07-20 21:54:46,921 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 175 transitions. Word has length 175 [2022-07-20 21:54:46,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:54:46,921 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 175 transitions. [2022-07-20 21:54:46,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.5319148936170213) internal successors, (166), 47 states have internal predecessors, (166), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-07-20 21:54:46,921 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 175 transitions. [2022-07-20 21:54:46,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-20 21:54:46,922 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:54:46,922 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 14, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:54:46,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-20 21:54:47,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-20 21:54:47,138 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:54:47,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:54:47,139 INFO L85 PathProgramCache]: Analyzing trace with hash -38045055, now seen corresponding path program 42 times [2022-07-20 21:54:47,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:54:47,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135868154] [2022-07-20 21:54:47,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:54:47,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:54:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:47,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:54:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:47,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:54:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:47,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:54:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:47,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:54:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:47,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:54:47,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:47,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:54:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:47,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:54:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:47,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:54:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:47,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:54:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:47,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:54:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:47,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:54:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:47,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:54:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:47,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:54:47,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:47,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-20 21:54:47,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:47,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-20 21:54:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:47,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-20 21:54:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:47,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1146 backedges. 42 proven. 708 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-20 21:54:47,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:54:47,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135868154] [2022-07-20 21:54:47,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135868154] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:54:47,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764618087] [2022-07-20 21:54:47,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:54:47,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:54:47,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:54:47,690 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:54:47,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-20 21:54:48,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-07-20 21:54:48,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:54:48,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-20 21:54:48,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:54:48,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:54:48,891 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-20 21:54:48,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-20 21:54:49,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:54:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1146 backedges. 96 proven. 708 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-07-20 21:54:49,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:54:49,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:54:49,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:54:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1146 backedges. 42 proven. 708 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-20 21:54:49,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764618087] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:54:49,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:54:49,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 68 [2022-07-20 21:54:49,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051767558] [2022-07-20 21:54:49,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:54:49,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-20 21:54:49,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:54:49,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-20 21:54:49,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=4301, Unknown=0, NotChecked=0, Total=4556 [2022-07-20 21:54:49,847 INFO L87 Difference]: Start difference. First operand 172 states and 175 transitions. Second operand has 68 states, 68 states have (on average 3.0441176470588234) internal successors, (207), 64 states have internal predecessors, (207), 29 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) [2022-07-20 21:54:51,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:54:51,374 INFO L93 Difference]: Finished difference Result 241 states and 245 transitions. [2022-07-20 21:54:51,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-20 21:54:51,374 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.0441176470588234) internal successors, (207), 64 states have internal predecessors, (207), 29 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) Word has length 179 [2022-07-20 21:54:51,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:54:51,375 INFO L225 Difference]: With dead ends: 241 [2022-07-20 21:54:51,375 INFO L226 Difference]: Without dead ends: 239 [2022-07-20 21:54:51,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 349 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2441 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=438, Invalid=7572, Unknown=0, NotChecked=0, Total=8010 [2022-07-20 21:54:51,376 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 107 mSDsluCounter, 1787 mSDsCounter, 0 mSdLazyCounter, 3492 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1842 SdHoareTripleChecker+Invalid, 3665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 3492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:54:51,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 1842 Invalid, 3665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 3492 Invalid, 0 Unknown, 82 Unchecked, 1.1s Time] [2022-07-20 21:54:51,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-07-20 21:54:51,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 185. [2022-07-20 21:54:51,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 152 states have (on average 1.019736842105263) internal successors, (155), 152 states have internal predecessors, (155), 17 states have call successors, (17), 15 states have call predecessors, (17), 15 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-20 21:54:51,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 189 transitions. [2022-07-20 21:54:51,412 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 189 transitions. Word has length 179 [2022-07-20 21:54:51,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:54:51,412 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 189 transitions. [2022-07-20 21:54:51,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.0441176470588234) internal successors, (207), 64 states have internal predecessors, (207), 29 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) [2022-07-20 21:54:51,413 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 189 transitions. [2022-07-20 21:54:51,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-20 21:54:51,413 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:54:51,414 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:54:51,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-07-20 21:54:51,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-07-20 21:54:51,632 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:54:51,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:54:51,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1869254391, now seen corresponding path program 43 times [2022-07-20 21:54:51,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:54:51,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666299652] [2022-07-20 21:54:51,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:54:51,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:54:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:52,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:54:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:52,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:54:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:52,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:54:52,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:52,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:54:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:52,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:54:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:52,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:54:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:52,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:54:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:52,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:54:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:52,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:54:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:52,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:54:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:52,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:54:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:52,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:54:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:52,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:54:52,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:52,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-20 21:54:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:52,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-20 21:54:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:52,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-20 21:54:52,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 45 proven. 755 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-20 21:54:52,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:54:52,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666299652] [2022-07-20 21:54:52,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666299652] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:54:52,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270979254] [2022-07-20 21:54:52,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:54:52,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:54:52,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:54:52,235 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:54:52,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-20 21:54:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:52,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-20 21:54:52,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:54:53,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 21:54:53,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:54:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 45 proven. 755 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-20 21:54:53,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:54:53,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:54:53,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:54:54,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 45 proven. 755 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-20 21:54:54,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270979254] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:54:54,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:54:54,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 68 [2022-07-20 21:54:54,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266327653] [2022-07-20 21:54:54,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:54:54,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-20 21:54:54,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:54:54,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-20 21:54:54,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=4330, Unknown=0, NotChecked=0, Total=4556 [2022-07-20 21:54:54,008 INFO L87 Difference]: Start difference. First operand 185 states and 189 transitions. Second operand has 68 states, 68 states have (on average 3.1176470588235294) internal successors, (212), 64 states have internal predecessors, (212), 29 states have call successors, (30), 1 states have call predecessors, (30), 2 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) [2022-07-20 21:54:56,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:54:56,670 INFO L93 Difference]: Finished difference Result 262 states and 267 transitions. [2022-07-20 21:54:56,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-20 21:54:56,670 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.1176470588235294) internal successors, (212), 64 states have internal predecessors, (212), 29 states have call successors, (30), 1 states have call predecessors, (30), 2 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) Word has length 183 [2022-07-20 21:54:56,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:54:56,671 INFO L225 Difference]: With dead ends: 262 [2022-07-20 21:54:56,671 INFO L226 Difference]: Without dead ends: 260 [2022-07-20 21:54:56,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 361 SyntacticMatches, 6 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3601 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=739, Invalid=12601, Unknown=0, NotChecked=0, Total=13340 [2022-07-20 21:54:56,672 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 232 mSDsluCounter, 2381 mSDsCounter, 0 mSdLazyCounter, 4685 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 2440 SdHoareTripleChecker+Invalid, 4907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 4685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:54:56,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 2440 Invalid, 4907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 4685 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-20 21:54:56,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-07-20 21:54:56,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 189. [2022-07-20 21:54:56,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 156 states have (on average 1.0192307692307692) internal successors, (159), 156 states have internal predecessors, (159), 17 states have call successors, (17), 15 states have call predecessors, (17), 15 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-20 21:54:56,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 193 transitions. [2022-07-20 21:54:56,718 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 193 transitions. Word has length 183 [2022-07-20 21:54:56,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:54:56,718 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 193 transitions. [2022-07-20 21:54:56,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.1176470588235294) internal successors, (212), 64 states have internal predecessors, (212), 29 states have call successors, (30), 1 states have call predecessors, (30), 2 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) [2022-07-20 21:54:56,718 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 193 transitions. [2022-07-20 21:54:56,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-07-20 21:54:56,719 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:54:56,719 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 15, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:54:56,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-07-20 21:54:56,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:54:56,923 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:54:56,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:54:56,924 INFO L85 PathProgramCache]: Analyzing trace with hash -443324860, now seen corresponding path program 44 times [2022-07-20 21:54:56,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:54:56,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3374508] [2022-07-20 21:54:56,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:54:56,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:54:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:57,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:54:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:57,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:54:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:57,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:54:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:57,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:54:57,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:57,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:54:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:57,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:54:57,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:57,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:54:57,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:57,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:54:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:57,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:54:57,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:57,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:54:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:57,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:54:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:57,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:54:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:57,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:54:57,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:57,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-20 21:54:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:57,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-20 21:54:57,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:57,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-20 21:54:57,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:57,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-20 21:54:57,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:54:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 42 proven. 771 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-20 21:54:57,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:54:57,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3374508] [2022-07-20 21:54:57,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3374508] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:54:57,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682195080] [2022-07-20 21:54:57,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:54:57,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:54:57,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:54:57,506 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:54:57,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-20 21:54:57,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:54:57,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:54:57,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-20 21:54:57,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:54:58,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:54:58,355 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:54:58,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:54:58,482 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:54:58,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:54:58,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:54:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 153 proven. 768 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-07-20 21:54:58,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:54:59,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:54:59,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:54:59,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 42 proven. 770 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2022-07-20 21:54:59,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682195080] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:54:59,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:54:59,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 71 [2022-07-20 21:54:59,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032595099] [2022-07-20 21:54:59,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:54:59,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-20 21:54:59,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:54:59,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-20 21:54:59,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=4699, Unknown=0, NotChecked=0, Total=4970 [2022-07-20 21:54:59,548 INFO L87 Difference]: Start difference. First operand 189 states and 193 transitions. Second operand has 71 states, 70 states have (on average 3.0428571428571427) internal successors, (213), 66 states have internal predecessors, (213), 31 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (34), 33 states have call predecessors, (34), 31 states have call successors, (34) [2022-07-20 21:55:01,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:55:01,296 INFO L93 Difference]: Finished difference Result 249 states and 253 transitions. [2022-07-20 21:55:01,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-20 21:55:01,297 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 3.0428571428571427) internal successors, (213), 66 states have internal predecessors, (213), 31 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (34), 33 states have call predecessors, (34), 31 states have call successors, (34) Word has length 187 [2022-07-20 21:55:01,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:55:01,297 INFO L225 Difference]: With dead ends: 249 [2022-07-20 21:55:01,298 INFO L226 Difference]: Without dead ends: 247 [2022-07-20 21:55:01,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 374 SyntacticMatches, 13 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2794 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=455, Invalid=8101, Unknown=0, NotChecked=0, Total=8556 [2022-07-20 21:55:01,298 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 183 mSDsluCounter, 1737 mSDsCounter, 0 mSdLazyCounter, 4013 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1794 SdHoareTripleChecker+Invalid, 4228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 4013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:55:01,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1794 Invalid, 4228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 4013 Invalid, 0 Unknown, 117 Unchecked, 1.3s Time] [2022-07-20 21:55:01,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-07-20 21:55:01,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 189. [2022-07-20 21:55:01,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 156 states have (on average 1.0192307692307692) internal successors, (159), 156 states have internal predecessors, (159), 17 states have call successors, (17), 15 states have call predecessors, (17), 15 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-20 21:55:01,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 193 transitions. [2022-07-20 21:55:01,339 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 193 transitions. Word has length 187 [2022-07-20 21:55:01,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:55:01,340 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 193 transitions. [2022-07-20 21:55:01,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 3.0428571428571427) internal successors, (213), 66 states have internal predecessors, (213), 31 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (34), 33 states have call predecessors, (34), 31 states have call successors, (34) [2022-07-20 21:55:01,340 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 193 transitions. [2022-07-20 21:55:01,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-07-20 21:55:01,340 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:55:01,341 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:55:01,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-07-20 21:55:01,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-20 21:55:01,547 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:55:01,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:55:01,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1846642579, now seen corresponding path program 45 times [2022-07-20 21:55:01,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:55:01,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52746358] [2022-07-20 21:55:01,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:55:01,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:55:01,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:01,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:55:01,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:01,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:55:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:01,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:55:01,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:01,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:55:01,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:01,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:55:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:01,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:55:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:01,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:55:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:01,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:55:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:01,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:55:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:01,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:55:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:01,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:55:01,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:01,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:55:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:01,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:55:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:01,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-20 21:55:01,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:01,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-20 21:55:01,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:01,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-20 21:55:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 339 proven. 431 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-20 21:55:01,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:55:01,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52746358] [2022-07-20 21:55:01,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52746358] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:55:01,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697636217] [2022-07-20 21:55:01,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:55:01,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:55:01,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:55:01,864 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:55:01,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-20 21:55:02,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-07-20 21:55:02,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:55:02,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-20 21:55:02,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:55:02,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 392 proven. 378 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-20 21:55:02,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:55:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 392 proven. 378 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-20 21:55:03,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697636217] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:55:03,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:55:03,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2022-07-20 21:55:03,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604734026] [2022-07-20 21:55:03,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:55:03,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-20 21:55:03,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:55:03,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-20 21:55:03,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2022-07-20 21:55:03,024 INFO L87 Difference]: Start difference. First operand 189 states and 193 transitions. Second operand has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 16 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-07-20 21:55:03,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:55:03,407 INFO L93 Difference]: Finished difference Result 265 states and 270 transitions. [2022-07-20 21:55:03,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-20 21:55:03,407 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 16 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) Word has length 187 [2022-07-20 21:55:03,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:55:03,408 INFO L225 Difference]: With dead ends: 265 [2022-07-20 21:55:03,408 INFO L226 Difference]: Without dead ends: 201 [2022-07-20 21:55:03,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 388 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2022-07-20 21:55:03,408 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 375 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:55:03,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 319 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:55:03,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-20 21:55:03,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 184. [2022-07-20 21:55:03,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 17 states have call successors, (17), 15 states have call predecessors, (17), 15 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-20 21:55:03,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 187 transitions. [2022-07-20 21:55:03,448 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 187 transitions. Word has length 187 [2022-07-20 21:55:03,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:55:03,448 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 187 transitions. [2022-07-20 21:55:03,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 16 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-07-20 21:55:03,449 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 187 transitions. [2022-07-20 21:55:03,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-07-20 21:55:03,449 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:55:03,450 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 15, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:55:03,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-07-20 21:55:03,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-20 21:55:03,656 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:55:03,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:55:03,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1911496390, now seen corresponding path program 46 times [2022-07-20 21:55:03,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:55:03,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033476550] [2022-07-20 21:55:03,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:55:03,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:55:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:04,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:55:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:04,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:55:04,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:04,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:55:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:04,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:55:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:04,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:55:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:04,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:55:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:04,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:55:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:04,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:55:04,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:04,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:55:04,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:04,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:55:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:04,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:55:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:04,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:55:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:04,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:55:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:04,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-20 21:55:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:04,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-20 21:55:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:04,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-20 21:55:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:04,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-20 21:55:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:04,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 45 proven. 818 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-20 21:55:04,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:55:04,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033476550] [2022-07-20 21:55:04,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033476550] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:55:04,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062706664] [2022-07-20 21:55:04,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:55:04,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:55:04,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:55:04,269 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:55:04,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-20 21:55:04,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:55:04,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:55:04,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-20 21:55:04,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:55:05,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:55:05,374 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-20 21:55:05,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-20 21:55:05,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:55:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 103 proven. 818 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-20 21:55:05,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:55:06,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:55:06,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:55:06,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 45 proven. 818 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-20 21:55:06,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062706664] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:55:06,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:55:06,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 72 [2022-07-20 21:55:06,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115196076] [2022-07-20 21:55:06,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:55:06,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-20 21:55:06,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:55:06,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-20 21:55:06,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=4841, Unknown=0, NotChecked=0, Total=5112 [2022-07-20 21:55:06,435 INFO L87 Difference]: Start difference. First operand 184 states and 187 transitions. Second operand has 72 states, 72 states have (on average 3.0694444444444446) internal successors, (221), 68 states have internal predecessors, (221), 31 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-07-20 21:55:08,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:55:08,260 INFO L93 Difference]: Finished difference Result 257 states and 261 transitions. [2022-07-20 21:55:08,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-20 21:55:08,261 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.0694444444444446) internal successors, (221), 68 states have internal predecessors, (221), 31 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) Word has length 191 [2022-07-20 21:55:08,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:55:08,262 INFO L225 Difference]: With dead ends: 257 [2022-07-20 21:55:08,262 INFO L226 Difference]: Without dead ends: 255 [2022-07-20 21:55:08,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 373 SyntacticMatches, 9 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2723 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=462, Invalid=8468, Unknown=0, NotChecked=0, Total=8930 [2022-07-20 21:55:08,263 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 111 mSDsluCounter, 2190 mSDsCounter, 0 mSdLazyCounter, 4302 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 2248 SdHoareTripleChecker+Invalid, 4533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 4302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:55:08,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 2248 Invalid, 4533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 4302 Invalid, 0 Unknown, 132 Unchecked, 1.4s Time] [2022-07-20 21:55:08,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-07-20 21:55:08,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 197. [2022-07-20 21:55:08,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 162 states have (on average 1.0185185185185186) internal successors, (165), 162 states have internal predecessors, (165), 18 states have call successors, (18), 16 states have call predecessors, (18), 16 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-20 21:55:08,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 201 transitions. [2022-07-20 21:55:08,313 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 201 transitions. Word has length 191 [2022-07-20 21:55:08,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:55:08,314 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 201 transitions. [2022-07-20 21:55:08,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.0694444444444446) internal successors, (221), 68 states have internal predecessors, (221), 31 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-07-20 21:55:08,314 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 201 transitions. [2022-07-20 21:55:08,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-07-20 21:55:08,315 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:55:08,315 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:55:08,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-20 21:55:08,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:55:08,536 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:55:08,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:55:08,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1959522608, now seen corresponding path program 47 times [2022-07-20 21:55:08,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:55:08,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116612332] [2022-07-20 21:55:08,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:55:08,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:55:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:09,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:55:09,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:09,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:55:09,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:09,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:55:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:09,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:55:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:09,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:55:09,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:09,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:55:09,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:09,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:55:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:09,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:55:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:09,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:55:09,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:09,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:55:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:09,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:55:09,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:09,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:55:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:09,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:55:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:09,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-20 21:55:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:09,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-20 21:55:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:09,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-20 21:55:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:09,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-20 21:55:09,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 48 proven. 869 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-20 21:55:09,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:55:09,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116612332] [2022-07-20 21:55:09,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116612332] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:55:09,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162881730] [2022-07-20 21:55:09,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:55:09,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:55:09,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:55:09,126 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:55:09,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-20 21:55:09,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-07-20 21:55:09,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:55:09,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-20 21:55:09,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:55:10,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 21:55:10,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:55:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 48 proven. 869 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-20 21:55:10,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:55:10,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:55:10,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:55:11,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 48 proven. 869 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-20 21:55:11,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162881730] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:55:11,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:55:11,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 72 [2022-07-20 21:55:11,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507270409] [2022-07-20 21:55:11,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:55:11,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-20 21:55:11,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:55:11,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-20 21:55:11,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=4872, Unknown=0, NotChecked=0, Total=5112 [2022-07-20 21:55:11,255 INFO L87 Difference]: Start difference. First operand 197 states and 201 transitions. Second operand has 72 states, 72 states have (on average 3.138888888888889) internal successors, (226), 68 states have internal predecessors, (226), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-07-20 21:55:14,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:55:14,156 INFO L93 Difference]: Finished difference Result 278 states and 283 transitions. [2022-07-20 21:55:14,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-20 21:55:14,156 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.138888888888889) internal successors, (226), 68 states have internal predecessors, (226), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) Word has length 195 [2022-07-20 21:55:14,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:55:14,157 INFO L225 Difference]: With dead ends: 278 [2022-07-20 21:55:14,157 INFO L226 Difference]: Without dead ends: 276 [2022-07-20 21:55:14,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 385 SyntacticMatches, 6 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4072 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=786, Invalid=14220, Unknown=0, NotChecked=0, Total=15006 [2022-07-20 21:55:14,159 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 359 mSDsluCounter, 2022 mSDsCounter, 0 mSdLazyCounter, 4674 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 2084 SdHoareTripleChecker+Invalid, 4994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 4674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:55:14,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 2084 Invalid, 4994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 4674 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-20 21:55:14,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-07-20 21:55:14,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 201. [2022-07-20 21:55:14,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 166 states have (on average 1.0180722891566265) internal successors, (169), 166 states have internal predecessors, (169), 18 states have call successors, (18), 16 states have call predecessors, (18), 16 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-20 21:55:14,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 205 transitions. [2022-07-20 21:55:14,212 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 205 transitions. Word has length 195 [2022-07-20 21:55:14,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:55:14,212 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 205 transitions. [2022-07-20 21:55:14,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.138888888888889) internal successors, (226), 68 states have internal predecessors, (226), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-07-20 21:55:14,213 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 205 transitions. [2022-07-20 21:55:14,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-20 21:55:14,213 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:55:14,214 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 16, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:55:14,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-07-20 21:55:14,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-07-20 21:55:14,431 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:55:14,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:55:14,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1613643901, now seen corresponding path program 48 times [2022-07-20 21:55:14,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:55:14,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455751399] [2022-07-20 21:55:14,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:55:14,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:55:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:14,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:55:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:14,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:55:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:15,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:55:15,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:15,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:55:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:15,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:55:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:15,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:55:15,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:15,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:55:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:15,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:55:15,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:15,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:55:15,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:15,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:55:15,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:15,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:55:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:15,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:55:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:15,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:55:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:15,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-20 21:55:15,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:15,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-20 21:55:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:15,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-20 21:55:15,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:15,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-20 21:55:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:15,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-20 21:55:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:15,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 45 proven. 885 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-20 21:55:15,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:55:15,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455751399] [2022-07-20 21:55:15,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455751399] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:55:15,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872207435] [2022-07-20 21:55:15,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:55:15,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:55:15,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:55:15,053 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:55:15,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-20 21:55:15,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-07-20 21:55:15,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:55:15,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-20 21:55:15,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:55:16,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:55:16,224 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:55:16,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:55:16,350 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:55:16,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:55:16,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:55:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 164 proven. 882 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-07-20 21:55:16,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:55:17,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:55:17,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:55:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 45 proven. 884 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2022-07-20 21:55:17,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872207435] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:55:17,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:55:17,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 73 [2022-07-20 21:55:17,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253483198] [2022-07-20 21:55:17,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:55:17,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-20 21:55:17,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:55:17,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-20 21:55:17,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=4978, Unknown=0, NotChecked=0, Total=5256 [2022-07-20 21:55:17,481 INFO L87 Difference]: Start difference. First operand 201 states and 205 transitions. Second operand has 73 states, 73 states have (on average 3.095890410958904) internal successors, (226), 69 states have internal predecessors, (226), 32 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 34 states have call predecessors, (35), 32 states have call successors, (35) [2022-07-20 21:55:19,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:55:19,269 INFO L93 Difference]: Finished difference Result 265 states and 269 transitions. [2022-07-20 21:55:19,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-20 21:55:19,270 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.095890410958904) internal successors, (226), 69 states have internal predecessors, (226), 32 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 34 states have call predecessors, (35), 32 states have call successors, (35) Word has length 199 [2022-07-20 21:55:19,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:55:19,271 INFO L225 Difference]: With dead ends: 265 [2022-07-20 21:55:19,271 INFO L226 Difference]: Without dead ends: 263 [2022-07-20 21:55:19,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 389 SyntacticMatches, 13 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2974 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=468, Invalid=8652, Unknown=0, NotChecked=0, Total=9120 [2022-07-20 21:55:19,272 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 173 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 4163 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1588 SdHoareTripleChecker+Invalid, 4383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 4163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:55:19,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 1588 Invalid, 4383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 4163 Invalid, 0 Unknown, 66 Unchecked, 1.4s Time] [2022-07-20 21:55:19,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-07-20 21:55:19,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 201. [2022-07-20 21:55:19,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 166 states have (on average 1.0180722891566265) internal successors, (169), 166 states have internal predecessors, (169), 18 states have call successors, (18), 16 states have call predecessors, (18), 16 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-20 21:55:19,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 205 transitions. [2022-07-20 21:55:19,322 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 205 transitions. Word has length 199 [2022-07-20 21:55:19,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:55:19,322 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 205 transitions. [2022-07-20 21:55:19,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.095890410958904) internal successors, (226), 69 states have internal predecessors, (226), 32 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 34 states have call predecessors, (35), 32 states have call successors, (35) [2022-07-20 21:55:19,322 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 205 transitions. [2022-07-20 21:55:19,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-20 21:55:19,323 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:55:19,323 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:55:19,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-07-20 21:55:19,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:55:19,531 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:55:19,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:55:19,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1727141414, now seen corresponding path program 49 times [2022-07-20 21:55:19,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:55:19,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137365113] [2022-07-20 21:55:19,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:55:19,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:55:19,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:19,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:55:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:19,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:55:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:19,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:55:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:19,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:55:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:19,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:55:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:19,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:55:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:19,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:55:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:19,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:55:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:19,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:55:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:19,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:55:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:19,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:55:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:19,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:55:19,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:19,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:55:19,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:19,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-20 21:55:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:19,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-20 21:55:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:19,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-20 21:55:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:19,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-20 21:55:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:19,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 393 proven. 492 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-07-20 21:55:19,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:55:19,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137365113] [2022-07-20 21:55:19,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137365113] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:55:19,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672074451] [2022-07-20 21:55:19,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:55:19,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:55:19,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:55:19,889 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:55:19,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-20 21:55:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:20,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-20 21:55:20,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:55:20,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 450 proven. 435 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-07-20 21:55:20,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:55:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 450 proven. 435 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-07-20 21:55:20,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672074451] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:55:20,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:55:20,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2022-07-20 21:55:20,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154473174] [2022-07-20 21:55:20,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:55:20,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-20 21:55:20,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:55:20,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-20 21:55:20,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2022-07-20 21:55:20,715 INFO L87 Difference]: Start difference. First operand 201 states and 205 transitions. Second operand has 53 states, 53 states have (on average 3.547169811320755) internal successors, (188), 53 states have internal predecessors, (188), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-07-20 21:55:21,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:55:21,116 INFO L93 Difference]: Finished difference Result 281 states and 286 transitions. [2022-07-20 21:55:21,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-20 21:55:21,116 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.547169811320755) internal successors, (188), 53 states have internal predecessors, (188), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 199 [2022-07-20 21:55:21,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:55:21,117 INFO L225 Difference]: With dead ends: 281 [2022-07-20 21:55:21,117 INFO L226 Difference]: Without dead ends: 213 [2022-07-20 21:55:21,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 413 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1107, Invalid=3585, Unknown=0, NotChecked=0, Total=4692 [2022-07-20 21:55:21,118 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 316 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:55:21,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 326 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:55:21,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-07-20 21:55:21,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 196. [2022-07-20 21:55:21,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 161 states have (on average 1.0124223602484472) internal successors, (163), 161 states have internal predecessors, (163), 18 states have call successors, (18), 16 states have call predecessors, (18), 16 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-20 21:55:21,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 199 transitions. [2022-07-20 21:55:21,170 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 199 transitions. Word has length 199 [2022-07-20 21:55:21,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:55:21,170 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 199 transitions. [2022-07-20 21:55:21,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.547169811320755) internal successors, (188), 53 states have internal predecessors, (188), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-07-20 21:55:21,170 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 199 transitions. [2022-07-20 21:55:21,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-07-20 21:55:21,171 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:55:21,171 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 16, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:55:21,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-07-20 21:55:21,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-07-20 21:55:21,372 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:55:21,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:55:21,372 INFO L85 PathProgramCache]: Analyzing trace with hash 785512179, now seen corresponding path program 50 times [2022-07-20 21:55:21,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:55:21,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659185849] [2022-07-20 21:55:21,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:55:21,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:55:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:21,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:55:21,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:21,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:55:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:21,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:55:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:21,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:55:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:21,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:55:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:21,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:55:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:21,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:55:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:21,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:55:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:21,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:55:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:21,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:55:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:21,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:55:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:21,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:55:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:22,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:55:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:22,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-20 21:55:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:22,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-20 21:55:22,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:22,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-20 21:55:22,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:22,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-20 21:55:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:22,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-20 21:55:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:22,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 48 proven. 936 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-20 21:55:22,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:55:22,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659185849] [2022-07-20 21:55:22,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659185849] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:55:22,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266747332] [2022-07-20 21:55:22,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:55:22,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:55:22,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:55:22,013 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:55:22,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-20 21:55:22,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:55:22,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:55:22,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-20 21:55:22,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:55:22,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:55:25,158 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-20 21:55:25,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-20 21:55:25,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:55:25,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 110 proven. 936 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-20 21:55:25,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:55:26,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:55:26,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:55:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 48 proven. 936 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-20 21:55:26,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266747332] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:55:26,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:55:26,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 76 [2022-07-20 21:55:26,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125377197] [2022-07-20 21:55:26,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:55:26,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-07-20 21:55:26,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:55:26,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-07-20 21:55:26,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=5412, Unknown=1, NotChecked=0, Total=5700 [2022-07-20 21:55:26,316 INFO L87 Difference]: Start difference. First operand 196 states and 199 transitions. Second operand has 76 states, 76 states have (on average 3.0921052631578947) internal successors, (235), 72 states have internal predecessors, (235), 33 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 35 states have call predecessors, (35), 33 states have call successors, (35) [2022-07-20 21:55:28,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:55:28,052 INFO L93 Difference]: Finished difference Result 268 states and 272 transitions. [2022-07-20 21:55:28,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-20 21:55:28,053 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.0921052631578947) internal successors, (235), 72 states have internal predecessors, (235), 33 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 35 states have call predecessors, (35), 33 states have call successors, (35) Word has length 203 [2022-07-20 21:55:28,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:55:28,063 INFO L225 Difference]: With dead ends: 268 [2022-07-20 21:55:28,063 INFO L226 Difference]: Without dead ends: 266 [2022-07-20 21:55:28,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 410 SyntacticMatches, 9 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2819 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=452, Invalid=8859, Unknown=1, NotChecked=0, Total=9312 [2022-07-20 21:55:28,065 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 136 mSDsluCounter, 1767 mSDsCounter, 0 mSdLazyCounter, 3970 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1827 SdHoareTripleChecker+Invalid, 4155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 3970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:55:28,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 1827 Invalid, 4155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 3970 Invalid, 0 Unknown, 116 Unchecked, 1.3s Time] [2022-07-20 21:55:28,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-20 21:55:28,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 209. [2022-07-20 21:55:28,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 172 states have (on average 1.0174418604651163) internal successors, (175), 172 states have internal predecessors, (175), 19 states have call successors, (19), 17 states have call predecessors, (19), 17 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-20 21:55:28,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 213 transitions. [2022-07-20 21:55:28,117 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 213 transitions. Word has length 203 [2022-07-20 21:55:28,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:55:28,118 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 213 transitions. [2022-07-20 21:55:28,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.0921052631578947) internal successors, (235), 72 states have internal predecessors, (235), 33 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 35 states have call predecessors, (35), 33 states have call successors, (35) [2022-07-20 21:55:28,118 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 213 transitions. [2022-07-20 21:55:28,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-07-20 21:55:28,122 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:55:28,122 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:55:28,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-07-20 21:55:28,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-07-20 21:55:28,335 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:55:28,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:55:28,336 INFO L85 PathProgramCache]: Analyzing trace with hash -14056855, now seen corresponding path program 51 times [2022-07-20 21:55:28,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:55:28,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086036690] [2022-07-20 21:55:28,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:55:28,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:55:28,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:28,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:55:28,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:28,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:55:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:28,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:55:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:28,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:55:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:28,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:55:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:28,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:55:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:28,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:55:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:28,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:55:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:28,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:55:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:28,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:55:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:28,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:55:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:28,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:55:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:28,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:55:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:28,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-20 21:55:28,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:28,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-20 21:55:28,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:28,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-20 21:55:28,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:28,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-20 21:55:28,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:28,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-20 21:55:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 51 proven. 991 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-20 21:55:28,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:55:28,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086036690] [2022-07-20 21:55:28,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086036690] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:55:28,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996179810] [2022-07-20 21:55:28,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:55:28,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:55:28,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:55:28,974 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:55:28,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-20 21:55:29,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-07-20 21:55:29,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:55:29,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-20 21:55:29,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:55:30,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:55:31,930 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-20 21:55:31,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-07-20 21:55:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 486 proven. 556 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-20 21:55:31,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:55:33,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-20 21:55:33,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-07-20 21:55:34,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 471 proven. 571 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-20 21:55:34,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996179810] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:55:34,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:55:34,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 42] total 116 [2022-07-20 21:55:34,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655561640] [2022-07-20 21:55:34,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:55:34,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-07-20 21:55:34,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:55:34,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-07-20 21:55:34,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1369, Invalid=11971, Unknown=0, NotChecked=0, Total=13340 [2022-07-20 21:55:34,552 INFO L87 Difference]: Start difference. First operand 209 states and 213 transitions. Second operand has 116 states, 116 states have (on average 3.0172413793103448) internal successors, (350), 111 states have internal predecessors, (350), 49 states have call successors, (50), 1 states have call predecessors, (50), 2 states have return successors, (51), 51 states have call predecessors, (51), 49 states have call successors, (51) [2022-07-20 21:55:38,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:55:38,884 INFO L93 Difference]: Finished difference Result 272 states and 276 transitions. [2022-07-20 21:55:38,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-07-20 21:55:38,885 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 3.0172413793103448) internal successors, (350), 111 states have internal predecessors, (350), 49 states have call successors, (50), 1 states have call predecessors, (50), 2 states have return successors, (51), 51 states have call predecessors, (51), 49 states have call successors, (51) Word has length 207 [2022-07-20 21:55:38,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:55:38,885 INFO L225 Difference]: With dead ends: 272 [2022-07-20 21:55:38,885 INFO L226 Difference]: Without dead ends: 204 [2022-07-20 21:55:38,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 407 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10978 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=3576, Invalid=35826, Unknown=0, NotChecked=0, Total=39402 [2022-07-20 21:55:38,888 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 153 mSDsluCounter, 1453 mSDsCounter, 0 mSdLazyCounter, 1903 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 382 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 21:55:38,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 1511 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1903 Invalid, 0 Unknown, 382 Unchecked, 0.7s Time] [2022-07-20 21:55:38,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-07-20 21:55:38,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2022-07-20 21:55:38,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 167 states have (on average 1.0119760479041917) internal successors, (169), 167 states have internal predecessors, (169), 19 states have call successors, (19), 17 states have call predecessors, (19), 17 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-20 21:55:38,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 207 transitions. [2022-07-20 21:55:38,945 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 207 transitions. Word has length 207 [2022-07-20 21:55:38,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:55:38,946 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 207 transitions. [2022-07-20 21:55:38,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 3.0172413793103448) internal successors, (350), 111 states have internal predecessors, (350), 49 states have call successors, (50), 1 states have call predecessors, (50), 2 states have return successors, (51), 51 states have call predecessors, (51), 49 states have call successors, (51) [2022-07-20 21:55:38,946 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 207 transitions. [2022-07-20 21:55:38,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-07-20 21:55:38,947 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:55:38,947 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:55:38,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-07-20 21:55:39,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:55:39,167 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:55:39,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:55:39,167 INFO L85 PathProgramCache]: Analyzing trace with hash -920417866, now seen corresponding path program 52 times [2022-07-20 21:55:39,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:55:39,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462010454] [2022-07-20 21:55:39,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:55:39,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:55:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:39,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:55:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:39,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:55:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:39,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:55:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:39,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:55:39,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:39,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:55:39,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:39,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:55:39,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:39,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:55:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:39,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:55:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:39,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:55:39,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:39,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:55:39,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:39,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:55:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:39,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:55:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:39,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:55:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:39,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-20 21:55:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:39,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-20 21:55:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:39,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-20 21:55:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:39,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-20 21:55:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:39,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-20 21:55:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:39,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-20 21:55:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1637 backedges. 48 proven. 1007 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-20 21:55:39,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:55:39,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462010454] [2022-07-20 21:55:39,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462010454] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:55:39,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601497296] [2022-07-20 21:55:39,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:55:39,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:55:39,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:55:39,821 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:55:39,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-20 21:55:40,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:55:40,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:55:40,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-20 21:55:40,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:55:40,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:55:41,053 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:55:41,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:55:41,216 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:55:41,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:55:41,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:55:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1637 backedges. 175 proven. 1004 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2022-07-20 21:55:41,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:55:42,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:55:42,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:55:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1637 backedges. 48 proven. 1006 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2022-07-20 21:55:42,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601497296] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:55:42,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:55:42,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 77 [2022-07-20 21:55:42,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824357529] [2022-07-20 21:55:42,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:55:42,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-07-20 21:55:42,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:55:42,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-07-20 21:55:42,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=5558, Unknown=0, NotChecked=0, Total=5852 [2022-07-20 21:55:42,414 INFO L87 Difference]: Start difference. First operand 204 states and 207 transitions. Second operand has 77 states, 77 states have (on average 3.116883116883117) internal successors, (240), 73 states have internal predecessors, (240), 34 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 36 states have call predecessors, (37), 34 states have call successors, (37) [2022-07-20 21:55:44,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:55:44,357 INFO L93 Difference]: Finished difference Result 218 states and 221 transitions. [2022-07-20 21:55:44,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-20 21:55:44,357 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.116883116883117) internal successors, (240), 73 states have internal predecessors, (240), 34 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 36 states have call predecessors, (37), 34 states have call successors, (37) Word has length 211 [2022-07-20 21:55:44,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:55:44,358 INFO L225 Difference]: With dead ends: 218 [2022-07-20 21:55:44,358 INFO L226 Difference]: Without dead ends: 216 [2022-07-20 21:55:44,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 413 SyntacticMatches, 13 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3286 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=492, Invalid=9608, Unknown=0, NotChecked=0, Total=10100 [2022-07-20 21:55:44,359 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 181 mSDsluCounter, 2294 mSDsCounter, 0 mSdLazyCounter, 4362 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 2359 SdHoareTripleChecker+Invalid, 4633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 4362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:55:44,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 2359 Invalid, 4633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 4362 Invalid, 0 Unknown, 103 Unchecked, 1.5s Time] [2022-07-20 21:55:44,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-20 21:55:44,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 208. [2022-07-20 21:55:44,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 171 states have (on average 1.0116959064327486) internal successors, (173), 171 states have internal predecessors, (173), 19 states have call successors, (19), 17 states have call predecessors, (19), 17 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-20 21:55:44,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 211 transitions. [2022-07-20 21:55:44,412 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 211 transitions. Word has length 211 [2022-07-20 21:55:44,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:55:44,412 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 211 transitions. [2022-07-20 21:55:44,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.116883116883117) internal successors, (240), 73 states have internal predecessors, (240), 34 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 36 states have call predecessors, (37), 34 states have call successors, (37) [2022-07-20 21:55:44,413 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 211 transitions. [2022-07-20 21:55:44,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-07-20 21:55:44,414 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:55:44,414 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:55:44,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-07-20 21:55:44,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:55:44,623 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:55:44,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:55:44,624 INFO L85 PathProgramCache]: Analyzing trace with hash 488504236, now seen corresponding path program 53 times [2022-07-20 21:55:44,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:55:44,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611748468] [2022-07-20 21:55:44,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:55:44,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:55:44,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:45,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:55:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:45,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:55:45,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:45,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:55:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:45,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:55:45,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:45,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:55:45,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:45,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:55:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:45,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:55:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:45,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:55:45,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:45,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:55:45,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:45,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:55:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:45,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:55:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:45,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:55:45,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:45,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:55:45,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:45,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-20 21:55:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:45,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-20 21:55:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:45,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-20 21:55:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:45,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-20 21:55:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:45,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-20 21:55:45,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:45,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-20 21:55:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1695 backedges. 51 proven. 1062 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-20 21:55:45,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:55:45,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611748468] [2022-07-20 21:55:45,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611748468] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:55:45,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882078976] [2022-07-20 21:55:45,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:55:45,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:55:45,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:55:45,321 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:55:45,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-20 21:55:45,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2022-07-20 21:55:45,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:55:45,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-20 21:55:45,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:55:46,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:55:48,659 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-20 21:55:48,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-20 21:55:49,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:55:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1695 backedges. 117 proven. 1062 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-20 21:55:49,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:55:49,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:55:49,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:55:49,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1695 backedges. 51 proven. 1062 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-20 21:55:49,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882078976] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:55:49,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:55:49,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 80 [2022-07-20 21:55:49,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553237057] [2022-07-20 21:55:49,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:55:49,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-20 21:55:49,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:55:49,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-20 21:55:49,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=6016, Unknown=1, NotChecked=0, Total=6320 [2022-07-20 21:55:49,916 INFO L87 Difference]: Start difference. First operand 208 states and 211 transitions. Second operand has 80 states, 80 states have (on average 3.1125) internal successors, (249), 76 states have internal predecessors, (249), 35 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 37 states have call predecessors, (37), 35 states have call successors, (37) [2022-07-20 21:55:52,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:55:52,187 INFO L93 Difference]: Finished difference Result 295 states and 299 transitions. [2022-07-20 21:55:52,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-20 21:55:52,188 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.1125) internal successors, (249), 76 states have internal predecessors, (249), 35 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 37 states have call predecessors, (37), 35 states have call successors, (37) Word has length 215 [2022-07-20 21:55:52,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:55:52,189 INFO L225 Difference]: With dead ends: 295 [2022-07-20 21:55:52,189 INFO L226 Difference]: Without dead ends: 293 [2022-07-20 21:55:52,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 422 SyntacticMatches, 9 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3333 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=534, Invalid=10385, Unknown=1, NotChecked=0, Total=10920 [2022-07-20 21:55:52,190 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 131 mSDsluCounter, 2773 mSDsCounter, 0 mSdLazyCounter, 5126 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 2835 SdHoareTripleChecker+Invalid, 5360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 5126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-20 21:55:52,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 2835 Invalid, 5360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 5126 Invalid, 0 Unknown, 123 Unchecked, 1.7s Time] [2022-07-20 21:55:52,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-07-20 21:55:52,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 221. [2022-07-20 21:55:52,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 182 states have (on average 1.0164835164835164) internal successors, (185), 182 states have internal predecessors, (185), 20 states have call successors, (20), 18 states have call predecessors, (20), 18 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-20 21:55:52,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 225 transitions. [2022-07-20 21:55:52,267 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 225 transitions. Word has length 215 [2022-07-20 21:55:52,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:55:52,267 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 225 transitions. [2022-07-20 21:55:52,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.1125) internal successors, (249), 76 states have internal predecessors, (249), 35 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 37 states have call predecessors, (37), 35 states have call successors, (37) [2022-07-20 21:55:52,267 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 225 transitions. [2022-07-20 21:55:52,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-07-20 21:55:52,268 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:55:52,268 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:55:52,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-07-20 21:55:52,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:55:52,486 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:55:52,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:55:52,486 INFO L85 PathProgramCache]: Analyzing trace with hash 704807586, now seen corresponding path program 54 times [2022-07-20 21:55:52,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:55:52,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308979022] [2022-07-20 21:55:52,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:55:52,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:55:52,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:53,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:55:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:53,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:55:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:53,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:55:53,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:53,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:55:53,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:53,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:55:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:53,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:55:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:53,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:55:53,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:53,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:55:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:53,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:55:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:53,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:55:53,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:53,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:55:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:53,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:55:53,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:53,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:55:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:53,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-20 21:55:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:53,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-20 21:55:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:53,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-20 21:55:53,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:53,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-20 21:55:53,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:53,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-20 21:55:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:53,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-20 21:55:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:55:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 54 proven. 1121 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-20 21:55:53,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:55:53,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308979022] [2022-07-20 21:55:53,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308979022] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:55:53,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224448709] [2022-07-20 21:55:53,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:55:53,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:55:53,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:55:53,214 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:55:53,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-07-20 21:55:53,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-07-20 21:55:53,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:55:53,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-20 21:55:53,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:55:54,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:55:56,097 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-20 21:55:56,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-07-20 21:55:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 550 proven. 625 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-20 21:55:56,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:55:57,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-20 21:55:57,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-07-20 21:55:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 534 proven. 641 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-20 21:55:58,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224448709] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:55:58,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:55:58,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 122 [2022-07-20 21:55:58,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763677965] [2022-07-20 21:55:58,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:55:58,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-07-20 21:55:58,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:55:58,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-07-20 21:55:58,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1510, Invalid=13252, Unknown=0, NotChecked=0, Total=14762 [2022-07-20 21:55:58,926 INFO L87 Difference]: Start difference. First operand 221 states and 225 transitions. Second operand has 122 states, 122 states have (on average 3.040983606557377) internal successors, (371), 117 states have internal predecessors, (371), 52 states have call successors, (53), 1 states have call predecessors, (53), 2 states have return successors, (54), 54 states have call predecessors, (54), 52 states have call successors, (54) [2022-07-20 21:56:03,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:56:03,731 INFO L93 Difference]: Finished difference Result 288 states and 292 transitions. [2022-07-20 21:56:03,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-20 21:56:03,731 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 3.040983606557377) internal successors, (371), 117 states have internal predecessors, (371), 52 states have call successors, (53), 1 states have call predecessors, (53), 2 states have return successors, (54), 54 states have call predecessors, (54), 52 states have call successors, (54) Word has length 219 [2022-07-20 21:56:03,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:56:03,732 INFO L225 Difference]: With dead ends: 288 [2022-07-20 21:56:03,732 INFO L226 Difference]: Without dead ends: 216 [2022-07-20 21:56:03,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 429 SyntacticMatches, 1 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12261 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=3939, Invalid=39951, Unknown=0, NotChecked=0, Total=43890 [2022-07-20 21:56:03,734 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 64 mSDsluCounter, 2279 mSDsCounter, 0 mSdLazyCounter, 2345 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 2339 SdHoareTripleChecker+Invalid, 2660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 21:56:03,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 2339 Invalid, 2660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2345 Invalid, 0 Unknown, 226 Unchecked, 0.8s Time] [2022-07-20 21:56:03,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-20 21:56:03,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2022-07-20 21:56:03,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 177 states have (on average 1.0112994350282485) internal successors, (179), 177 states have internal predecessors, (179), 20 states have call successors, (20), 18 states have call predecessors, (20), 18 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-20 21:56:03,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 219 transitions. [2022-07-20 21:56:03,791 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 219 transitions. Word has length 219 [2022-07-20 21:56:03,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:56:03,791 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 219 transitions. [2022-07-20 21:56:03,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 3.040983606557377) internal successors, (371), 117 states have internal predecessors, (371), 52 states have call successors, (53), 1 states have call predecessors, (53), 2 states have return successors, (54), 54 states have call predecessors, (54), 52 states have call successors, (54) [2022-07-20 21:56:03,791 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 219 transitions. [2022-07-20 21:56:03,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-07-20 21:56:03,792 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:56:03,792 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 18, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:56:03,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-07-20 21:56:03,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-20 21:56:03,995 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:56:03,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:56:03,996 INFO L85 PathProgramCache]: Analyzing trace with hash 762479087, now seen corresponding path program 55 times [2022-07-20 21:56:03,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:56:03,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638327314] [2022-07-20 21:56:03,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:56:03,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:56:04,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:04,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:56:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:04,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:56:04,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:04,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:56:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:04,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:56:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:04,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:56:04,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:04,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:56:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:04,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:56:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:04,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:56:04,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:04,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:56:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:04,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:56:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:04,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:56:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:04,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:56:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:04,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:56:04,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:04,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-20 21:56:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:04,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-20 21:56:04,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:04,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-20 21:56:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:04,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-20 21:56:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:04,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-20 21:56:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:04,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-20 21:56:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:04,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-07-20 21:56:04,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 51 proven. 1137 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-07-20 21:56:04,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:56:04,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638327314] [2022-07-20 21:56:04,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638327314] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:56:04,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620984665] [2022-07-20 21:56:04,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:56:04,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:56:04,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:56:04,711 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:56:04,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-07-20 21:56:04,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:04,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 87 conjunts are in the unsatisfiable core [2022-07-20 21:56:04,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:56:05,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:56:05,871 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:56:05,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:56:06,012 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:56:06,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:56:06,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:56:06,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 186 proven. 1134 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2022-07-20 21:56:06,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:56:06,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:56:06,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:56:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 51 proven. 1136 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2022-07-20 21:56:07,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620984665] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:56:07,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:56:07,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 81 [2022-07-20 21:56:07,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057239367] [2022-07-20 21:56:07,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:56:07,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-07-20 21:56:07,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:56:07,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-07-20 21:56:07,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=6170, Unknown=0, NotChecked=0, Total=6480 [2022-07-20 21:56:07,285 INFO L87 Difference]: Start difference. First operand 216 states and 219 transitions. Second operand has 81 states, 81 states have (on average 3.1358024691358026) internal successors, (254), 77 states have internal predecessors, (254), 36 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (39), 38 states have call predecessors, (39), 36 states have call successors, (39) [2022-07-20 21:56:09,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:56:09,484 INFO L93 Difference]: Finished difference Result 230 states and 233 transitions. [2022-07-20 21:56:09,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-20 21:56:09,485 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.1358024691358026) internal successors, (254), 77 states have internal predecessors, (254), 36 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (39), 38 states have call predecessors, (39), 36 states have call successors, (39) Word has length 223 [2022-07-20 21:56:09,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:56:09,485 INFO L225 Difference]: With dead ends: 230 [2022-07-20 21:56:09,485 INFO L226 Difference]: Without dead ends: 228 [2022-07-20 21:56:09,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 436 SyntacticMatches, 13 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3613 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=516, Invalid=10614, Unknown=0, NotChecked=0, Total=11130 [2022-07-20 21:56:09,486 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 140 mSDsluCounter, 2516 mSDsCounter, 0 mSdLazyCounter, 5337 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 2584 SdHoareTripleChecker+Invalid, 5544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 5337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-20 21:56:09,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 2584 Invalid, 5544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 5337 Invalid, 0 Unknown, 70 Unchecked, 1.7s Time] [2022-07-20 21:56:09,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-07-20 21:56:09,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 220. [2022-07-20 21:56:09,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 181 states have (on average 1.011049723756906) internal successors, (183), 181 states have internal predecessors, (183), 20 states have call successors, (20), 18 states have call predecessors, (20), 18 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-20 21:56:09,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 223 transitions. [2022-07-20 21:56:09,550 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 223 transitions. Word has length 223 [2022-07-20 21:56:09,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:56:09,551 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 223 transitions. [2022-07-20 21:56:09,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.1358024691358026) internal successors, (254), 77 states have internal predecessors, (254), 36 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (39), 38 states have call predecessors, (39), 36 states have call successors, (39) [2022-07-20 21:56:09,551 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 223 transitions. [2022-07-20 21:56:09,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-07-20 21:56:09,552 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:56:09,552 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 18, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:56:09,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-07-20 21:56:09,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-20 21:56:09,770 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:56:09,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:56:09,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1414803301, now seen corresponding path program 56 times [2022-07-20 21:56:09,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:56:09,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694560567] [2022-07-20 21:56:09,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:56:09,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:56:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:10,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:56:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:10,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:56:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:10,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:56:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:10,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:56:10,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:10,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:56:10,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:10,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:56:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:10,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:56:10,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:10,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:56:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:10,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:56:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:10,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:56:10,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:10,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:56:10,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:10,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:56:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:10,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:56:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:10,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-20 21:56:10,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:10,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-20 21:56:10,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:10,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-20 21:56:10,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:10,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-20 21:56:10,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:10,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-20 21:56:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:10,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-20 21:56:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:10,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-07-20 21:56:10,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:10,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1902 backedges. 54 proven. 1196 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-07-20 21:56:10,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:56:10,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694560567] [2022-07-20 21:56:10,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694560567] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:56:10,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560526689] [2022-07-20 21:56:10,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:56:10,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:56:10,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:56:10,535 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:56:10,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-07-20 21:56:10,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:56:10,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:56:10,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-20 21:56:10,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:56:11,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:56:11,872 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-20 21:56:11,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-20 21:56:12,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:56:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1902 backedges. 124 proven. 1196 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-20 21:56:12,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:56:12,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:56:12,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:56:13,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1902 backedges. 54 proven. 1196 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-07-20 21:56:13,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560526689] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:56:13,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:56:13,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 84 [2022-07-20 21:56:13,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959200300] [2022-07-20 21:56:13,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:56:13,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-07-20 21:56:13,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:56:13,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-07-20 21:56:13,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=6653, Unknown=0, NotChecked=0, Total=6972 [2022-07-20 21:56:13,204 INFO L87 Difference]: Start difference. First operand 220 states and 223 transitions. Second operand has 84 states, 84 states have (on average 3.130952380952381) internal successors, (263), 80 states have internal predecessors, (263), 37 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (39), 39 states have call predecessors, (39), 37 states have call successors, (39) [2022-07-20 21:56:15,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:56:15,673 INFO L93 Difference]: Finished difference Result 305 states and 309 transitions. [2022-07-20 21:56:15,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-20 21:56:15,674 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.130952380952381) internal successors, (263), 80 states have internal predecessors, (263), 37 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (39), 39 states have call predecessors, (39), 37 states have call successors, (39) Word has length 227 [2022-07-20 21:56:15,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:56:15,675 INFO L225 Difference]: With dead ends: 305 [2022-07-20 21:56:15,675 INFO L226 Difference]: Without dead ends: 303 [2022-07-20 21:56:15,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 445 SyntacticMatches, 9 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3659 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=534, Invalid=11456, Unknown=0, NotChecked=0, Total=11990 [2022-07-20 21:56:15,676 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 97 mSDsluCounter, 3295 mSDsCounter, 0 mSdLazyCounter, 5939 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 3362 SdHoareTripleChecker+Invalid, 6169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 5939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-20 21:56:15,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 3362 Invalid, 6169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 5939 Invalid, 0 Unknown, 149 Unchecked, 1.9s Time] [2022-07-20 21:56:15,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-07-20 21:56:15,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 233. [2022-07-20 21:56:15,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 192 states have (on average 1.015625) internal successors, (195), 192 states have internal predecessors, (195), 21 states have call successors, (21), 19 states have call predecessors, (21), 19 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-20 21:56:15,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 237 transitions. [2022-07-20 21:56:15,746 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 237 transitions. Word has length 227 [2022-07-20 21:56:15,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:56:15,746 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 237 transitions. [2022-07-20 21:56:15,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.130952380952381) internal successors, (263), 80 states have internal predecessors, (263), 37 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (39), 39 states have call predecessors, (39), 37 states have call successors, (39) [2022-07-20 21:56:15,746 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 237 transitions. [2022-07-20 21:56:15,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-07-20 21:56:15,747 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:56:15,747 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:56:15,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-07-20 21:56:15,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:56:15,947 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:56:15,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:56:15,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1357499941, now seen corresponding path program 57 times [2022-07-20 21:56:15,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:56:15,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882527420] [2022-07-20 21:56:15,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:56:15,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:56:15,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:16,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 21:56:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:16,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-20 21:56:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:16,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-20 21:56:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:16,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:56:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:16,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:56:16,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:16,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-20 21:56:16,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:16,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:56:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:16,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-20 21:56:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:16,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-20 21:56:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:16,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-20 21:56:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:16,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-20 21:56:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:16,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-20 21:56:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:16,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-20 21:56:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:16,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-20 21:56:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:16,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-20 21:56:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:16,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-20 21:56:16,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:16,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-20 21:56:16,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:16,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-20 21:56:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:16,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-20 21:56:16,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:16,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-07-20 21:56:16,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:56:16,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1968 backedges. 57 proven. 1259 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-07-20 21:56:16,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:56:16,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882527420] [2022-07-20 21:56:16,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882527420] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:56:16,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590134153] [2022-07-20 21:56:16,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:56:16,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:56:16,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:56:16,709 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:56:16,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-07-20 21:56:17,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-07-20 21:56:17,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:56:17,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-20 21:56:17,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:56:18,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:56:20,329 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-20 21:56:20,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-07-20 21:56:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1968 backedges. 618 proven. 698 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-07-20 21:56:20,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:56:21,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-20 21:56:21,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-07-20 21:56:23,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1968 backedges. 601 proven. 715 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-07-20 21:56:23,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590134153] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:56:23,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:56:23,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46, 46] total 128 [2022-07-20 21:56:23,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47347698] [2022-07-20 21:56:23,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:56:23,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-07-20 21:56:23,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:56:23,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-07-20 21:56:23,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1658, Invalid=14598, Unknown=0, NotChecked=0, Total=16256 [2022-07-20 21:56:23,430 INFO L87 Difference]: Start difference. First operand 233 states and 237 transitions. Second operand has 128 states, 128 states have (on average 3.0625) internal successors, (392), 123 states have internal predecessors, (392), 55 states have call successors, (56), 1 states have call predecessors, (56), 2 states have return successors, (57), 57 states have call predecessors, (57), 55 states have call successors, (57)