./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/pr2.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 5922a5be589e27d89439744489152c928c7510f0140c8b0fb4d1faadee969752 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 22:59:06,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 22:59:06,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 22:59:06,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 22:59:06,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 22:59:06,647 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 22:59:06,649 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 22:59:06,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 22:59:06,656 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 22:59:06,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 22:59:06,662 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 22:59:06,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 22:59:06,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 22:59:06,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 22:59:06,668 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 22:59:06,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 22:59:06,672 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 22:59:06,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 22:59:06,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 22:59:06,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 22:59:06,684 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 22:59:06,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 22:59:06,686 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 22:59:06,687 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 22:59:06,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 22:59:06,692 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 22:59:06,692 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 22:59:06,694 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 22:59:06,694 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 22:59:06,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 22:59:06,695 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 22:59:06,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 22:59:06,697 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 22:59:06,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 22:59:06,699 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 22:59:06,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 22:59:06,700 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 22:59:06,700 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 22:59:06,700 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 22:59:06,701 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 22:59:06,702 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 22:59:06,703 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 22:59:06,741 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 22:59:06,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 22:59:06,742 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 22:59:06,742 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 22:59:06,743 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 22:59:06,743 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 22:59:06,743 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 22:59:06,744 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 22:59:06,744 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 22:59:06,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 22:59:06,745 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 22:59:06,745 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 22:59:06,745 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 22:59:06,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 22:59:06,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 22:59:06,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 22:59:06,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 22:59:06,746 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 22:59:06,746 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 22:59:06,747 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 22:59:06,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 22:59:06,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 22:59:06,747 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 22:59:06,747 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 22:59:06,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:59:06,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 22:59:06,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 22:59:06,750 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 22:59:06,750 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 22:59:06,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 22:59:06,750 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 22:59:06,750 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 22:59:06,751 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 22:59:06,751 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 22:59:06,751 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5922a5be589e27d89439744489152c928c7510f0140c8b0fb4d1faadee969752 [2021-12-16 22:59:06,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 22:59:06,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 22:59:06,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 22:59:06,989 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 22:59:06,989 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 22:59:06,990 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pr2.c [2021-12-16 22:59:07,041 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5623f5236/1ff1ede6d6c14a63941d2d90d83407e8/FLAG71ef413a4 [2021-12-16 22:59:07,466 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 22:59:07,467 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr2.c [2021-12-16 22:59:07,475 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5623f5236/1ff1ede6d6c14a63941d2d90d83407e8/FLAG71ef413a4 [2021-12-16 22:59:07,491 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5623f5236/1ff1ede6d6c14a63941d2d90d83407e8 [2021-12-16 22:59:07,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 22:59:07,495 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 22:59:07,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 22:59:07,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 22:59:07,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 22:59:07,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:59:07" (1/1) ... [2021-12-16 22:59:07,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eb37e46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:59:07, skipping insertion in model container [2021-12-16 22:59:07,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:59:07" (1/1) ... [2021-12-16 22:59:07,509 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 22:59:07,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 22:59:07,647 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-tiling/pr2.c[394,407] [2021-12-16 22:59:07,660 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:59:07,665 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 22:59:07,676 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-tiling/pr2.c[394,407] [2021-12-16 22:59:07,682 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:59:07,693 INFO L208 MainTranslator]: Completed translation [2021-12-16 22:59:07,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:59:07 WrapperNode [2021-12-16 22:59:07,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 22:59:07,695 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 22:59:07,695 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 22:59:07,695 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 22:59:07,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:59:07" (1/1) ... [2021-12-16 22:59:07,706 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:59:07" (1/1) ... [2021-12-16 22:59:07,722 INFO L137 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2021-12-16 22:59:07,722 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 22:59:07,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 22:59:07,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 22:59:07,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 22:59:07,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:59:07" (1/1) ... [2021-12-16 22:59:07,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:59:07" (1/1) ... [2021-12-16 22:59:07,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:59:07" (1/1) ... [2021-12-16 22:59:07,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:59:07" (1/1) ... [2021-12-16 22:59:07,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:59:07" (1/1) ... [2021-12-16 22:59:07,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:59:07" (1/1) ... [2021-12-16 22:59:07,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:59:07" (1/1) ... [2021-12-16 22:59:07,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 22:59:07,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 22:59:07,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 22:59:07,752 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 22:59:07,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:59:07" (1/1) ... [2021-12-16 22:59:07,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:59:07,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:07,788 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 22:59:07,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 22:59:07,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 22:59:07,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 22:59:07,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 22:59:07,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 22:59:07,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 22:59:07,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 22:59:07,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 22:59:07,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 22:59:07,893 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 22:59:07,895 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 22:59:08,091 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 22:59:08,095 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 22:59:08,096 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 22:59:08,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:59:08 BoogieIcfgContainer [2021-12-16 22:59:08,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 22:59:08,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 22:59:08,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 22:59:08,102 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 22:59:08,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 10:59:07" (1/3) ... [2021-12-16 22:59:08,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@589f2c0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:59:08, skipping insertion in model container [2021-12-16 22:59:08,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:59:07" (2/3) ... [2021-12-16 22:59:08,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@589f2c0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:59:08, skipping insertion in model container [2021-12-16 22:59:08,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:59:08" (3/3) ... [2021-12-16 22:59:08,104 INFO L111 eAbstractionObserver]: Analyzing ICFG pr2.c [2021-12-16 22:59:08,108 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 22:59:08,109 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 22:59:08,184 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 22:59:08,190 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 22:59:08,190 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 22:59:08,208 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:08,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 22:59:08,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:08,218 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:08,218 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:08,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:08,226 INFO L85 PathProgramCache]: Analyzing trace with hash -583465863, now seen corresponding path program 1 times [2021-12-16 22:59:08,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:08,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420807188] [2021-12-16 22:59:08,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:08,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:08,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:08,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420807188] [2021-12-16 22:59:08,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420807188] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:59:08,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:59:08,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 22:59:08,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018467394] [2021-12-16 22:59:08,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:59:08,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 22:59:08,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:08,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 22:59:08,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 22:59:08,475 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:08,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:08,487 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2021-12-16 22:59:08,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 22:59:08,489 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-16 22:59:08,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:08,494 INFO L225 Difference]: With dead ends: 43 [2021-12-16 22:59:08,495 INFO L226 Difference]: Without dead ends: 19 [2021-12-16 22:59:08,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 22:59:08,500 INFO L933 BasicCegarLoop]: 30 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, 30 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:08,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:59:08,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-16 22:59:08,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-16 22:59:08,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:08,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-12-16 22:59:08,526 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2021-12-16 22:59:08,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:08,527 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-12-16 22:59:08,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:08,527 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-12-16 22:59:08,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 22:59:08,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:08,528 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:08,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 22:59:08,529 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:08,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:08,530 INFO L85 PathProgramCache]: Analyzing trace with hash 96592507, now seen corresponding path program 1 times [2021-12-16 22:59:08,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:08,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541691039] [2021-12-16 22:59:08,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:08,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:08,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:08,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:08,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541691039] [2021-12-16 22:59:08,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541691039] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:59:08,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:59:08,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 22:59:08,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675288523] [2021-12-16 22:59:08,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:59:08,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 22:59:08,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:08,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 22:59:08,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 22:59:08,600 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:08,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:08,642 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-12-16 22:59:08,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 22:59:08,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-16 22:59:08,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:08,644 INFO L225 Difference]: With dead ends: 28 [2021-12-16 22:59:08,645 INFO L226 Difference]: Without dead ends: 26 [2021-12-16 22:59:08,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:59:08,650 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:08,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 59 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:59:08,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-16 22:59:08,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2021-12-16 22:59:08,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:08,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-12-16 22:59:08,659 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2021-12-16 22:59:08,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:08,660 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-12-16 22:59:08,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:08,662 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-12-16 22:59:08,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 22:59:08,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:08,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:08,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 22:59:08,664 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:08,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:08,665 INFO L85 PathProgramCache]: Analyzing trace with hash 96652089, now seen corresponding path program 1 times [2021-12-16 22:59:08,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:08,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693760199] [2021-12-16 22:59:08,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:08,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:08,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:08,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:08,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693760199] [2021-12-16 22:59:08,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693760199] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:59:08,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:59:08,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 22:59:08,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993677221] [2021-12-16 22:59:08,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:59:08,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 22:59:08,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:08,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 22:59:08,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:59:08,867 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:08,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:08,912 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2021-12-16 22:59:08,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 22:59:08,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-16 22:59:08,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:08,913 INFO L225 Difference]: With dead ends: 36 [2021-12-16 22:59:08,913 INFO L226 Difference]: Without dead ends: 25 [2021-12-16 22:59:08,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:59:08,920 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 53 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:08,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 21 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:59:08,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-16 22:59:08,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-12-16 22:59:08,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:08,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-12-16 22:59:08,925 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2021-12-16 22:59:08,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:08,926 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-12-16 22:59:08,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:08,926 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-12-16 22:59:08,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 22:59:08,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:08,927 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:08,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 22:59:08,928 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:08,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:08,928 INFO L85 PathProgramCache]: Analyzing trace with hash 37256114, now seen corresponding path program 1 times [2021-12-16 22:59:08,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:08,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734810745] [2021-12-16 22:59:08,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:08,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:09,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:09,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734810745] [2021-12-16 22:59:09,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734810745] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:09,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042430952] [2021-12-16 22:59:09,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:09,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:09,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:09,187 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:59:09,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 22:59:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:09,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-16 22:59:09,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:09,346 INFO L388 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 16 treesize of output 12 [2021-12-16 22:59:09,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:09,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-16 22:59:09,443 INFO L388 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 15 treesize of output 7 [2021-12-16 22:59:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:09,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:59:09,538 INFO L388 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 15 treesize of output 13 [2021-12-16 22:59:09,541 INFO L388 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 24 treesize of output 22 [2021-12-16 22:59:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:09,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042430952] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:59:09,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:59:09,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 18 [2021-12-16 22:59:09,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672093951] [2021-12-16 22:59:09,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:59:09,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 22:59:09,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:09,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 22:59:09,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-12-16 22:59:09,571 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:10,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:10,154 INFO L93 Difference]: Finished difference Result 104 states and 123 transitions. [2021-12-16 22:59:10,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 22:59:10,155 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-16 22:59:10,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:10,157 INFO L225 Difference]: With dead ends: 104 [2021-12-16 22:59:10,157 INFO L226 Difference]: Without dead ends: 94 [2021-12-16 22:59:10,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=272, Invalid=850, Unknown=0, NotChecked=0, Total=1122 [2021-12-16 22:59:10,158 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 255 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:10,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 130 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:59:10,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-16 22:59:10,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 29. [2021-12-16 22:59:10,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:10,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-12-16 22:59:10,164 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2021-12-16 22:59:10,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:10,165 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-12-16 22:59:10,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:10,165 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-12-16 22:59:10,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 22:59:10,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:10,166 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:10,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 22:59:10,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:10,387 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:10,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:10,388 INFO L85 PathProgramCache]: Analyzing trace with hash -355770896, now seen corresponding path program 1 times [2021-12-16 22:59:10,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:10,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703940624] [2021-12-16 22:59:10,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:10,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:10,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:10,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:10,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703940624] [2021-12-16 22:59:10,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703940624] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:59:10,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:59:10,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 22:59:10,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209233061] [2021-12-16 22:59:10,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:59:10,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 22:59:10,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:10,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 22:59:10,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 22:59:10,443 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:10,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:10,465 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2021-12-16 22:59:10,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 22:59:10,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-16 22:59:10,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:10,467 INFO L225 Difference]: With dead ends: 54 [2021-12-16 22:59:10,468 INFO L226 Difference]: Without dead ends: 39 [2021-12-16 22:59:10,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:59:10,469 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:10,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 45 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:59:10,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-16 22:59:10,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2021-12-16 22:59:10,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:10,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-12-16 22:59:10,474 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 17 [2021-12-16 22:59:10,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:10,474 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-12-16 22:59:10,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-12-16 22:59:10,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 22:59:10,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:10,476 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:10,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 22:59:10,476 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:10,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:10,477 INFO L85 PathProgramCache]: Analyzing trace with hash 324287474, now seen corresponding path program 1 times [2021-12-16 22:59:10,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:10,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273491239] [2021-12-16 22:59:10,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:10,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:10,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:10,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:10,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273491239] [2021-12-16 22:59:10,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273491239] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:10,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704235928] [2021-12-16 22:59:10,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:10,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:10,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:10,591 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:59:10,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 22:59:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:10,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 22:59:10,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:10,687 INFO L388 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 16 treesize of output 12 [2021-12-16 22:59:10,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:10,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2021-12-16 22:59:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:10,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:59:10,845 INFO L388 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 15 treesize of output 13 [2021-12-16 22:59:10,847 INFO L388 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 24 treesize of output 22 [2021-12-16 22:59:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:10,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704235928] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:59:10,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:59:10,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 13 [2021-12-16 22:59:10,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311241359] [2021-12-16 22:59:10,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:59:10,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 22:59:10,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:10,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 22:59:10,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-16 22:59:10,865 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:11,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:11,202 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2021-12-16 22:59:11,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-16 22:59:11,203 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-16 22:59:11,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:11,203 INFO L225 Difference]: With dead ends: 88 [2021-12-16 22:59:11,204 INFO L226 Difference]: Without dead ends: 86 [2021-12-16 22:59:11,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2021-12-16 22:59:11,205 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 99 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:11,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 139 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:59:11,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-16 22:59:11,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 37. [2021-12-16 22:59:11,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:11,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-12-16 22:59:11,212 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 17 [2021-12-16 22:59:11,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:11,212 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-12-16 22:59:11,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:11,212 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-12-16 22:59:11,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-16 22:59:11,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:11,213 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:11,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 22:59:11,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-16 22:59:11,436 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:11,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:11,436 INFO L85 PathProgramCache]: Analyzing trace with hash -2078603285, now seen corresponding path program 1 times [2021-12-16 22:59:11,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:11,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175108714] [2021-12-16 22:59:11,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:11,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:11,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:11,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:11,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175108714] [2021-12-16 22:59:11,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175108714] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:59:11,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:59:11,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 22:59:11,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473094713] [2021-12-16 22:59:11,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:59:11,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:59:11,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:11,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:59:11,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 22:59:11,470 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:11,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:11,480 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-12-16 22:59:11,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:59:11,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-16 22:59:11,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:11,482 INFO L225 Difference]: With dead ends: 57 [2021-12-16 22:59:11,482 INFO L226 Difference]: Without dead ends: 42 [2021-12-16 22:59:11,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 22:59:11,483 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:11,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 38 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:59:11,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-16 22:59:11,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2021-12-16 22:59:11,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:11,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-12-16 22:59:11,487 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 21 [2021-12-16 22:59:11,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:11,488 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-12-16 22:59:11,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:11,488 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-12-16 22:59:11,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-16 22:59:11,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:11,489 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:11,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 22:59:11,489 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:11,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:11,489 INFO L85 PathProgramCache]: Analyzing trace with hash 2125491333, now seen corresponding path program 1 times [2021-12-16 22:59:11,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:11,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829067609] [2021-12-16 22:59:11,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:11,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:11,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:11,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829067609] [2021-12-16 22:59:11,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829067609] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:11,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668758508] [2021-12-16 22:59:11,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:11,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:11,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:11,630 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:59:11,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 22:59:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:11,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-16 22:59:11,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:11,731 INFO L388 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 [2021-12-16 22:59:11,858 INFO L388 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 15 treesize of output 7 [2021-12-16 22:59:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:11,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:59:11,953 INFO L388 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 17 treesize of output 15 [2021-12-16 22:59:11,963 INFO L388 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 30 treesize of output 26 [2021-12-16 22:59:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:11,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668758508] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:59:11,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:59:11,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2021-12-16 22:59:11,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699658939] [2021-12-16 22:59:11,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:59:11,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 22:59:11,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:11,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 22:59:11,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-12-16 22:59:11,984 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:12,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:12,180 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2021-12-16 22:59:12,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 22:59:12,180 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-16 22:59:12,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:12,181 INFO L225 Difference]: With dead ends: 85 [2021-12-16 22:59:12,181 INFO L226 Difference]: Without dead ends: 68 [2021-12-16 22:59:12,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2021-12-16 22:59:12,182 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 131 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:12,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 110 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:59:12,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-16 22:59:12,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 44. [2021-12-16 22:59:12,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:12,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2021-12-16 22:59:12,188 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 23 [2021-12-16 22:59:12,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:12,189 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2021-12-16 22:59:12,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:12,189 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2021-12-16 22:59:12,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-16 22:59:12,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:12,190 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:12,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 22:59:12,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:12,391 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:12,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:12,391 INFO L85 PathProgramCache]: Analyzing trace with hash 845627655, now seen corresponding path program 1 times [2021-12-16 22:59:12,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:12,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690493635] [2021-12-16 22:59:12,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:12,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:12,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:12,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690493635] [2021-12-16 22:59:12,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690493635] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:12,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267064620] [2021-12-16 22:59:12,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:12,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:12,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:12,544 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:59:12,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 22:59:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:12,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 22:59:12,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:12,629 INFO L388 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 20 treesize of output 16 [2021-12-16 22:59:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:12,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:59:12,775 INFO L388 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 17 treesize of output 15 [2021-12-16 22:59:12,777 INFO L388 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 30 treesize of output 26 [2021-12-16 22:59:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:12,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267064620] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:59:12,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:59:12,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2021-12-16 22:59:12,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429651701] [2021-12-16 22:59:12,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:59:12,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 22:59:12,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:12,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 22:59:12,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-16 22:59:12,797 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:13,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:13,140 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2021-12-16 22:59:13,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-16 22:59:13,141 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-16 22:59:13,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:13,142 INFO L225 Difference]: With dead ends: 102 [2021-12-16 22:59:13,142 INFO L226 Difference]: Without dead ends: 100 [2021-12-16 22:59:13,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=691, Unknown=0, NotChecked=0, Total=930 [2021-12-16 22:59:13,143 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 95 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:13,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 138 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:59:13,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-16 22:59:13,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 57. [2021-12-16 22:59:13,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 56 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:13,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2021-12-16 22:59:13,151 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 23 [2021-12-16 22:59:13,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:13,151 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2021-12-16 22:59:13,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:13,151 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2021-12-16 22:59:13,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 22:59:13,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:13,152 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:13,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 22:59:13,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:13,367 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:13,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:13,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1664572736, now seen corresponding path program 1 times [2021-12-16 22:59:13,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:13,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463065789] [2021-12-16 22:59:13,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:13,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 22:59:13,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:13,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463065789] [2021-12-16 22:59:13,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463065789] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:59:13,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:59:13,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 22:59:13,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14327233] [2021-12-16 22:59:13,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:59:13,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:59:13,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:13,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:59:13,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 22:59:13,397 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:13,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:13,413 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2021-12-16 22:59:13,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:59:13,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-16 22:59:13,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:13,414 INFO L225 Difference]: With dead ends: 80 [2021-12-16 22:59:13,414 INFO L226 Difference]: Without dead ends: 63 [2021-12-16 22:59:13,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 22:59:13,415 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:13,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 50 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:59:13,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-16 22:59:13,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2021-12-16 22:59:13,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:13,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2021-12-16 22:59:13,421 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 27 [2021-12-16 22:59:13,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:13,421 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2021-12-16 22:59:13,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:13,421 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2021-12-16 22:59:13,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-16 22:59:13,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:13,422 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:13,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 22:59:13,423 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:13,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:13,423 INFO L85 PathProgramCache]: Analyzing trace with hash -147377384, now seen corresponding path program 2 times [2021-12-16 22:59:13,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:13,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002350593] [2021-12-16 22:59:13,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:13,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:13,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:13,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002350593] [2021-12-16 22:59:13,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002350593] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:13,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292563378] [2021-12-16 22:59:13,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:59:13,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:13,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:13,602 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:59:13,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 22:59:13,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:59:13,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:59:13,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 22:59:13,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:13,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:59:14,114 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:14,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292563378] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:59:14,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:59:14,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2021-12-16 22:59:14,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070881208] [2021-12-16 22:59:14,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:59:14,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-16 22:59:14,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:14,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-16 22:59:14,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-12-16 22:59:14,119 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:14,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:14,316 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2021-12-16 22:59:14,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 22:59:14,316 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-16 22:59:14,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:14,317 INFO L225 Difference]: With dead ends: 108 [2021-12-16 22:59:14,317 INFO L226 Difference]: Without dead ends: 72 [2021-12-16 22:59:14,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2021-12-16 22:59:14,318 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 157 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:14,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 108 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:59:14,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-16 22:59:14,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2021-12-16 22:59:14,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:14,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2021-12-16 22:59:14,324 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 29 [2021-12-16 22:59:14,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:14,325 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2021-12-16 22:59:14,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:14,325 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2021-12-16 22:59:14,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-16 22:59:14,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:14,326 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:14,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 22:59:14,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-16 22:59:14,539 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:14,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:14,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1385615761, now seen corresponding path program 3 times [2021-12-16 22:59:14,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:14,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699487119] [2021-12-16 22:59:14,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:14,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:14,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:14,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699487119] [2021-12-16 22:59:14,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699487119] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:14,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838760568] [2021-12-16 22:59:14,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:59:14,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:14,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:14,745 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:59:14,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 22:59:14,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 22:59:14,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:59:14,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-16 22:59:14,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:14,914 INFO L388 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 16 treesize of output 12 [2021-12-16 22:59:14,949 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 22:59:14,949 INFO L388 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 23 treesize of output 22 [2021-12-16 22:59:15,170 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:15,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:59:15,326 INFO L388 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 25 treesize of output 23 [2021-12-16 22:59:15,333 INFO L388 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 88 treesize of output 84 [2021-12-16 22:59:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:15,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838760568] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:59:15,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:59:15,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 30 [2021-12-16 22:59:15,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55490559] [2021-12-16 22:59:15,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:59:15,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-16 22:59:15,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:15,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-16 22:59:15,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2021-12-16 22:59:15,463 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 30 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:16,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:16,302 INFO L93 Difference]: Finished difference Result 140 states and 155 transitions. [2021-12-16 22:59:16,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-16 22:59:16,303 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 30 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-16 22:59:16,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:16,304 INFO L225 Difference]: With dead ends: 140 [2021-12-16 22:59:16,304 INFO L226 Difference]: Without dead ends: 130 [2021-12-16 22:59:16,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=447, Invalid=2309, Unknown=0, NotChecked=0, Total=2756 [2021-12-16 22:59:16,305 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 275 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:16,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 220 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 410 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2021-12-16 22:59:16,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-16 22:59:16,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 71. [2021-12-16 22:59:16,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 70 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:16,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2021-12-16 22:59:16,312 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 33 [2021-12-16 22:59:16,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:16,312 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2021-12-16 22:59:16,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 30 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:16,313 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2021-12-16 22:59:16,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-16 22:59:16,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:16,313 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:16,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 22:59:16,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:16,514 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:16,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:16,515 INFO L85 PathProgramCache]: Analyzing trace with hash -2065206767, now seen corresponding path program 1 times [2021-12-16 22:59:16,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:16,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803099388] [2021-12-16 22:59:16,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:16,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:16,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:16,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:16,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803099388] [2021-12-16 22:59:16,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803099388] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:16,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409619359] [2021-12-16 22:59:16,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:16,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:16,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:16,617 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:59:16,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 22:59:16,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:16,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-16 22:59:16,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:16,740 INFO L388 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 16 treesize of output 12 [2021-12-16 22:59:16,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:16,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:59:16,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:16,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:59:16,949 INFO L388 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 15 treesize of output 7 [2021-12-16 22:59:16,987 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 22:59:16,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:59:19,152 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_58| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_58| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_153 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_58| 8) (- 4)) v_ArrVal_153) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) |c_ULTIMATE.start_main_~MINVAL~0#1|)))) is different from false [2021-12-16 22:59:19,197 INFO L388 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 25 treesize of output 23 [2021-12-16 22:59:19,200 INFO L388 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 200 treesize of output 192 [2021-12-16 22:59:19,393 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 1 not checked. [2021-12-16 22:59:19,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409619359] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:59:19,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:59:19,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 27 [2021-12-16 22:59:19,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321768935] [2021-12-16 22:59:19,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:59:19,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-16 22:59:19,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:19,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-16 22:59:19,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=573, Unknown=1, NotChecked=48, Total=702 [2021-12-16 22:59:19,396 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:21,481 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|))) (and (forall ((|v_ULTIMATE.start_main_~i~0#1_58| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_58| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_153 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_58| 8) (- 4)) v_ArrVal_153) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) |c_ULTIMATE.start_main_~MINVAL~0#1|)))) (<= (select .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 8) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4))) 0) (< 3 |c_ULTIMATE.start_main_~MINVAL~0#1|) (<= 3 |c_ULTIMATE.start_main_~CCCELVOL2~0#1|) (= (select .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset|)) 0) (= 0 |c_ULTIMATE.start_main_~#volArray~0#1.offset|) (= |c_ULTIMATE.start_main_~i~0#1| 1))) is different from false [2021-12-16 22:59:22,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:22,181 INFO L93 Difference]: Finished difference Result 126 states and 141 transitions. [2021-12-16 22:59:22,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-16 22:59:22,181 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-16 22:59:22,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:22,182 INFO L225 Difference]: With dead ends: 126 [2021-12-16 22:59:22,182 INFO L226 Difference]: Without dead ends: 116 [2021-12-16 22:59:22,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=357, Invalid=2199, Unknown=2, NotChecked=198, Total=2756 [2021-12-16 22:59:22,183 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 192 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:22,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 225 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 577 Invalid, 0 Unknown, 114 Unchecked, 0.3s Time] [2021-12-16 22:59:22,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-16 22:59:22,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 77. [2021-12-16 22:59:22,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.118421052631579) internal successors, (85), 76 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:22,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2021-12-16 22:59:22,189 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 33 [2021-12-16 22:59:22,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:22,189 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2021-12-16 22:59:22,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:22,190 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2021-12-16 22:59:22,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-16 22:59:22,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:22,192 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:22,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 22:59:22,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:22,393 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:22,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:22,394 INFO L85 PathProgramCache]: Analyzing trace with hash 382246692, now seen corresponding path program 4 times [2021-12-16 22:59:22,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:22,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335176297] [2021-12-16 22:59:22,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:22,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:22,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:22,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:22,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335176297] [2021-12-16 22:59:22,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335176297] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:22,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822242825] [2021-12-16 22:59:22,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:59:22,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:22,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:22,624 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:59:22,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 22:59:22,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:59:22,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:59:22,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 22:59:22,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:22,727 INFO L388 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 [2021-12-16 22:59:22,890 INFO L388 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 [2021-12-16 22:59:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:22,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:59:23,012 INFO L388 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 17 treesize of output 15 [2021-12-16 22:59:23,020 INFO L388 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 34 treesize of output 30 [2021-12-16 22:59:23,063 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:23,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822242825] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:59:23,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:59:23,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2021-12-16 22:59:23,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150566418] [2021-12-16 22:59:23,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:59:23,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-16 22:59:23,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:23,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-16 22:59:23,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-12-16 22:59:23,065 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:23,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:23,557 INFO L93 Difference]: Finished difference Result 141 states and 155 transitions. [2021-12-16 22:59:23,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-16 22:59:23,557 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-16 22:59:23,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:23,558 INFO L225 Difference]: With dead ends: 141 [2021-12-16 22:59:23,558 INFO L226 Difference]: Without dead ends: 131 [2021-12-16 22:59:23,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2021-12-16 22:59:23,560 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 152 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:23,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 185 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:59:23,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-16 22:59:23,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 83. [2021-12-16 22:59:23,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 82 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:23,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-12-16 22:59:23,567 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 39 [2021-12-16 22:59:23,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:23,567 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-12-16 22:59:23,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:23,567 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-12-16 22:59:23,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-16 22:59:23,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:23,568 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:23,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 22:59:23,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-16 22:59:23,790 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:23,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:23,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1287892696, now seen corresponding path program 2 times [2021-12-16 22:59:23,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:23,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108431286] [2021-12-16 22:59:23,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:23,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:23,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:23,969 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:23,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:23,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108431286] [2021-12-16 22:59:23,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108431286] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:23,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615116039] [2021-12-16 22:59:23,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:59:23,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:23,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:23,971 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:59:23,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 22:59:24,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:59:24,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:59:24,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-16 22:59:24,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:24,058 INFO L388 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 [2021-12-16 22:59:24,208 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:24,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:59:24,343 INFO L388 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 17 treesize of output 15 [2021-12-16 22:59:24,345 INFO L388 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 30 treesize of output 26 [2021-12-16 22:59:24,369 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:24,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615116039] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:59:24,369 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:59:24,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2021-12-16 22:59:24,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069522173] [2021-12-16 22:59:24,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:59:24,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-16 22:59:24,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:24,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-16 22:59:24,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-12-16 22:59:24,372 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:25,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:25,112 INFO L93 Difference]: Finished difference Result 179 states and 197 transitions. [2021-12-16 22:59:25,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-16 22:59:25,113 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-16 22:59:25,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:25,114 INFO L225 Difference]: With dead ends: 179 [2021-12-16 22:59:25,114 INFO L226 Difference]: Without dead ends: 177 [2021-12-16 22:59:25,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=507, Invalid=2685, Unknown=0, NotChecked=0, Total=3192 [2021-12-16 22:59:25,116 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 192 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:25,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 225 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 22:59:25,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-16 22:59:25,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 95. [2021-12-16 22:59:25,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.1063829787234043) internal successors, (104), 94 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:25,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2021-12-16 22:59:25,123 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 39 [2021-12-16 22:59:25,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:25,124 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2021-12-16 22:59:25,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:25,124 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2021-12-16 22:59:25,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-16 22:59:25,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:25,125 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:25,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 22:59:25,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-16 22:59:25,345 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:25,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:25,346 INFO L85 PathProgramCache]: Analyzing trace with hash -270486921, now seen corresponding path program 5 times [2021-12-16 22:59:25,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:25,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868249057] [2021-12-16 22:59:25,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:25,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:25,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:25,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:25,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868249057] [2021-12-16 22:59:25,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868249057] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:25,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851587104] [2021-12-16 22:59:25,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:59:25,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:25,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:25,598 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:59:25,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 22:59:25,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-16 22:59:25,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:59:25,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 22:59:25,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:26,108 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 52 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:26,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:59:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 52 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:26,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851587104] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:59:26,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:59:26,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 34 [2021-12-16 22:59:26,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168780525] [2021-12-16 22:59:26,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:59:26,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-16 22:59:26,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:26,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-16 22:59:26,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2021-12-16 22:59:26,322 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:26,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:26,569 INFO L93 Difference]: Finished difference Result 188 states and 204 transitions. [2021-12-16 22:59:26,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 22:59:26,575 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-16 22:59:26,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:26,576 INFO L225 Difference]: With dead ends: 188 [2021-12-16 22:59:26,576 INFO L226 Difference]: Without dead ends: 116 [2021-12-16 22:59:26,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=438, Invalid=1202, Unknown=0, NotChecked=0, Total=1640 [2021-12-16 22:59:26,579 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 282 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:26,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 213 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:59:26,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-16 22:59:26,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 107. [2021-12-16 22:59:26,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0943396226415094) internal successors, (116), 106 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:26,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 116 transitions. [2021-12-16 22:59:26,589 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 116 transitions. Word has length 45 [2021-12-16 22:59:26,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:26,590 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 116 transitions. [2021-12-16 22:59:26,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:26,590 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 116 transitions. [2021-12-16 22:59:26,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-16 22:59:26,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:26,591 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:26,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 22:59:26,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-16 22:59:26,795 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:26,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:26,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1534181648, now seen corresponding path program 6 times [2021-12-16 22:59:26,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:26,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878244091] [2021-12-16 22:59:26,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:26,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:27,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:27,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878244091] [2021-12-16 22:59:27,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878244091] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:27,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491934122] [2021-12-16 22:59:27,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:59:27,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:27,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:27,004 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:59:27,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 22:59:27,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-16 22:59:27,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:59:27,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-16 22:59:27,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:27,197 INFO L388 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 16 treesize of output 12 [2021-12-16 22:59:27,229 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 22:59:27,230 INFO L388 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 23 treesize of output 22 [2021-12-16 22:59:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:27,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:59:27,685 INFO L388 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 25 treesize of output 23 [2021-12-16 22:59:27,687 INFO L388 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 88 treesize of output 84 [2021-12-16 22:59:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:27,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491934122] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:59:27,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:59:27,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 39 [2021-12-16 22:59:27,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069882490] [2021-12-16 22:59:27,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:59:27,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-16 22:59:27,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:27,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-16 22:59:27,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2021-12-16 22:59:27,827 INFO L87 Difference]: Start difference. First operand 107 states and 116 transitions. Second operand has 39 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 39 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:29,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:29,479 INFO L93 Difference]: Finished difference Result 210 states and 230 transitions. [2021-12-16 22:59:29,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-16 22:59:29,479 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 39 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-16 22:59:29,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:29,480 INFO L225 Difference]: With dead ends: 210 [2021-12-16 22:59:29,480 INFO L226 Difference]: Without dead ends: 200 [2021-12-16 22:59:29,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 75 SyntacticMatches, 9 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1940 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=808, Invalid=5672, Unknown=0, NotChecked=0, Total=6480 [2021-12-16 22:59:29,482 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 350 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:29,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 476 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1120 Invalid, 0 Unknown, 75 Unchecked, 0.5s Time] [2021-12-16 22:59:29,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-16 22:59:29,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 119. [2021-12-16 22:59:29,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0932203389830508) internal successors, (129), 118 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:29,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2021-12-16 22:59:29,490 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 49 [2021-12-16 22:59:29,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:29,490 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2021-12-16 22:59:29,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 39 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:29,491 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2021-12-16 22:59:29,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-16 22:59:29,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:29,491 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:29,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 22:59:29,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-16 22:59:29,703 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:29,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:29,704 INFO L85 PathProgramCache]: Analyzing trace with hash -55832404, now seen corresponding path program 2 times [2021-12-16 22:59:29,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:29,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36924321] [2021-12-16 22:59:29,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:29,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:29,843 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:29,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:29,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36924321] [2021-12-16 22:59:29,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36924321] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:29,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800517732] [2021-12-16 22:59:29,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:59:29,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:29,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:29,845 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:59:29,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 22:59:29,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:59:29,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:59:29,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-16 22:59:29,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:29,941 INFO L388 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 16 treesize of output 12 [2021-12-16 22:59:29,960 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:59:29,960 INFO L388 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 29 treesize of output 28 [2021-12-16 22:59:30,132 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-16 22:59:30,132 INFO L388 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 42 treesize of output 20 [2021-12-16 22:59:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:30,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:59:30,260 INFO L388 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 17 treesize of output 15 [2021-12-16 22:59:30,264 INFO L388 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 30 treesize of output 26 [2021-12-16 22:59:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:30,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800517732] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:59:30,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:59:30,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 19 [2021-12-16 22:59:30,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69696959] [2021-12-16 22:59:30,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:59:30,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 22:59:30,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:30,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 22:59:30,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-12-16 22:59:30,310 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:31,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:31,093 INFO L93 Difference]: Finished difference Result 215 states and 235 transitions. [2021-12-16 22:59:31,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-16 22:59:31,093 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-16 22:59:31,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:31,094 INFO L225 Difference]: With dead ends: 215 [2021-12-16 22:59:31,094 INFO L226 Difference]: Without dead ends: 213 [2021-12-16 22:59:31,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=356, Invalid=2506, Unknown=0, NotChecked=0, Total=2862 [2021-12-16 22:59:31,095 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 137 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:31,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 295 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 22:59:31,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-12-16 22:59:31,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 125. [2021-12-16 22:59:31,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.096774193548387) internal successors, (136), 124 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:31,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2021-12-16 22:59:31,104 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 49 [2021-12-16 22:59:31,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:31,104 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2021-12-16 22:59:31,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:31,105 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2021-12-16 22:59:31,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-16 22:59:31,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:31,106 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:31,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-16 22:59:31,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-16 22:59:31,314 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:31,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:31,314 INFO L85 PathProgramCache]: Analyzing trace with hash 2083146051, now seen corresponding path program 7 times [2021-12-16 22:59:31,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:31,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052946053] [2021-12-16 22:59:31,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:31,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 10 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:31,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:31,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052946053] [2021-12-16 22:59:31,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052946053] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:31,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6674506] [2021-12-16 22:59:31,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:59:31,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:31,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:31,517 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:59:31,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 22:59:31,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:31,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-16 22:59:31,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:31,652 INFO L388 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 [2021-12-16 22:59:31,914 INFO L388 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 [2021-12-16 22:59:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 10 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:31,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:59:32,080 INFO L388 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 17 treesize of output 15 [2021-12-16 22:59:32,082 INFO L388 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 34 treesize of output 30 [2021-12-16 22:59:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 10 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:32,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6674506] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:59:32,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:59:32,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 33 [2021-12-16 22:59:32,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023835972] [2021-12-16 22:59:32,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:59:32,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 22:59:32,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:32,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 22:59:32,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 22:59:32,140 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand has 33 states, 33 states have (on average 4.121212121212121) internal successors, (136), 33 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:33,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:33,544 INFO L93 Difference]: Finished difference Result 240 states and 260 transitions. [2021-12-16 22:59:33,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-16 22:59:33,545 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.121212121212121) internal successors, (136), 33 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-16 22:59:33,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:33,545 INFO L225 Difference]: With dead ends: 240 [2021-12-16 22:59:33,546 INFO L226 Difference]: Without dead ends: 230 [2021-12-16 22:59:33,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=640, Invalid=4762, Unknown=0, NotChecked=0, Total=5402 [2021-12-16 22:59:33,547 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 301 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:33,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 353 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 22:59:33,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-12-16 22:59:33,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 131. [2021-12-16 22:59:33,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0923076923076922) internal successors, (142), 130 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:33,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 142 transitions. [2021-12-16 22:59:33,556 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 142 transitions. Word has length 55 [2021-12-16 22:59:33,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:33,557 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 142 transitions. [2021-12-16 22:59:33,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.121212121212121) internal successors, (136), 33 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:33,557 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 142 transitions. [2021-12-16 22:59:33,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-16 22:59:33,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:33,558 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:33,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-16 22:59:33,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:33,767 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:33,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:33,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1012702775, now seen corresponding path program 3 times [2021-12-16 22:59:33,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:33,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420448949] [2021-12-16 22:59:33,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:33,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:33,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:33,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:33,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420448949] [2021-12-16 22:59:33,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420448949] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:33,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107305359] [2021-12-16 22:59:33,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:59:33,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:33,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:33,911 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) [2021-12-16 22:59:33,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 22:59:33,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-16 22:59:33,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:59:33,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-16 22:59:33,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:34,034 INFO L388 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 16 treesize of output 12 [2021-12-16 22:59:34,258 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-16 22:59:34,259 INFO L388 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 42 treesize of output 20 [2021-12-16 22:59:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:34,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:59:34,399 INFO L388 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 17 treesize of output 15 [2021-12-16 22:59:34,400 INFO L388 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 30 treesize of output 26 [2021-12-16 22:59:34,440 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:34,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107305359] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:59:34,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:59:34,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 21 [2021-12-16 22:59:34,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66029026] [2021-12-16 22:59:34,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:59:34,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 22:59:34,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:34,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 22:59:34,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-12-16 22:59:34,442 INFO L87 Difference]: Start difference. First operand 131 states and 142 transitions. Second operand has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 21 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:35,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:35,938 INFO L93 Difference]: Finished difference Result 305 states and 335 transitions. [2021-12-16 22:59:35,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-12-16 22:59:35,939 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 21 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-16 22:59:35,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:35,940 INFO L225 Difference]: With dead ends: 305 [2021-12-16 22:59:35,940 INFO L226 Difference]: Without dead ends: 303 [2021-12-16 22:59:35,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 97 SyntacticMatches, 7 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2821 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=807, Invalid=7383, Unknown=0, NotChecked=0, Total=8190 [2021-12-16 22:59:35,942 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 251 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 1635 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 1768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:35,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 486 Invalid, 1768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1635 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-16 22:59:35,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-12-16 22:59:35,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 143. [2021-12-16 22:59:35,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.091549295774648) internal successors, (155), 142 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:35,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 155 transitions. [2021-12-16 22:59:35,953 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 155 transitions. Word has length 55 [2021-12-16 22:59:35,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:35,953 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 155 transitions. [2021-12-16 22:59:35,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 21 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:35,954 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 155 transitions. [2021-12-16 22:59:35,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-16 22:59:35,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:35,955 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:35,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-16 22:59:36,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:36,164 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:36,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:36,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1404832086, now seen corresponding path program 8 times [2021-12-16 22:59:36,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:36,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22131634] [2021-12-16 22:59:36,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:36,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:36,496 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 83 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:36,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:36,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22131634] [2021-12-16 22:59:36,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22131634] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:36,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195697184] [2021-12-16 22:59:36,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:59:36,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:36,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:36,498 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) [2021-12-16 22:59:36,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 22:59:36,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:59:36,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:59:36,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-16 22:59:36,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 114 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:37,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:59:37,460 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 114 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:37,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195697184] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:59:37,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:59:37,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 42 [2021-12-16 22:59:37,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53223516] [2021-12-16 22:59:37,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:59:37,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-16 22:59:37,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:37,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-16 22:59:37,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1310, Unknown=0, NotChecked=0, Total=1722 [2021-12-16 22:59:37,462 INFO L87 Difference]: Start difference. First operand 143 states and 155 transitions. Second operand has 42 states, 42 states have (on average 4.0476190476190474) internal successors, (170), 42 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:37,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:37,757 INFO L93 Difference]: Finished difference Result 272 states and 294 transitions. [2021-12-16 22:59:37,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 22:59:37,758 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.0476190476190474) internal successors, (170), 42 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-16 22:59:37,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:37,758 INFO L225 Difference]: With dead ends: 272 [2021-12-16 22:59:37,758 INFO L226 Difference]: Without dead ends: 164 [2021-12-16 22:59:37,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=618, Invalid=1832, Unknown=0, NotChecked=0, Total=2450 [2021-12-16 22:59:37,760 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 303 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:37,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 262 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:59:37,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-16 22:59:37,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 155. [2021-12-16 22:59:37,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0844155844155845) internal successors, (167), 154 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:37,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 167 transitions. [2021-12-16 22:59:37,771 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 167 transitions. Word has length 61 [2021-12-16 22:59:37,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:37,771 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 167 transitions. [2021-12-16 22:59:37,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.0476190476190474) internal successors, (170), 42 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:37,771 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 167 transitions. [2021-12-16 22:59:37,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 22:59:37,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:37,772 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:37,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-16 22:59:37,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:37,983 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:37,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:37,984 INFO L85 PathProgramCache]: Analyzing trace with hash 337347535, now seen corresponding path program 9 times [2021-12-16 22:59:37,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:37,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355468455] [2021-12-16 22:59:37,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:37,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:37,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 12 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:38,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:38,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355468455] [2021-12-16 22:59:38,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355468455] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:38,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372428827] [2021-12-16 22:59:38,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:59:38,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:38,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:38,227 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) [2021-12-16 22:59:38,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-16 22:59:38,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-16 22:59:38,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:59:38,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-16 22:59:38,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:38,499 INFO L388 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 16 treesize of output 12 [2021-12-16 22:59:38,538 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 22:59:38,538 INFO L388 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 23 treesize of output 22 [2021-12-16 22:59:38,957 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 12 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:38,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:59:39,202 INFO L388 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 25 treesize of output 23 [2021-12-16 22:59:39,209 INFO L388 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 88 treesize of output 84 [2021-12-16 22:59:39,393 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 12 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:59:39,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372428827] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:59:39,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:59:39,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 48 [2021-12-16 22:59:39,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041784330] [2021-12-16 22:59:39,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:59:39,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-16 22:59:39,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:59:39,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-16 22:59:39,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2059, Unknown=0, NotChecked=0, Total=2256 [2021-12-16 22:59:39,396 INFO L87 Difference]: Start difference. First operand 155 states and 167 transitions. Second operand has 48 states, 48 states have (on average 3.8333333333333335) internal successors, (184), 48 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:42,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:59:42,720 INFO L93 Difference]: Finished difference Result 318 states and 344 transitions. [2021-12-16 22:59:42,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-16 22:59:42,720 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.8333333333333335) internal successors, (184), 48 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-16 22:59:42,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:59:42,721 INFO L225 Difference]: With dead ends: 318 [2021-12-16 22:59:42,721 INFO L226 Difference]: Without dead ends: 308 [2021-12-16 22:59:42,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 101 SyntacticMatches, 21 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5271 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1534, Invalid=13228, Unknown=0, NotChecked=0, Total=14762 [2021-12-16 22:59:42,724 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 651 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 22:59:42,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 640 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 1678 Invalid, 0 Unknown, 85 Unchecked, 0.7s Time] [2021-12-16 22:59:42,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-12-16 22:59:42,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 167. [2021-12-16 22:59:42,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.0843373493975903) internal successors, (180), 166 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:42,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 180 transitions. [2021-12-16 22:59:42,736 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 180 transitions. Word has length 65 [2021-12-16 22:59:42,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:59:42,736 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 180 transitions. [2021-12-16 22:59:42,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.8333333333333335) internal successors, (184), 48 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:59:42,737 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 180 transitions. [2021-12-16 22:59:42,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 22:59:42,737 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:59:42,738 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:59:42,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-16 22:59:42,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-16 22:59:42,944 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:59:42,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:59:42,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1371350069, now seen corresponding path program 3 times [2021-12-16 22:59:42,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:59:42,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574498797] [2021-12-16 22:59:42,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:59:42,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:59:42,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:59:43,196 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 42 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 22:59:43,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:59:43,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574498797] [2021-12-16 22:59:43,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574498797] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:59:43,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702525921] [2021-12-16 22:59:43,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:59:43,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:59:43,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:59:43,197 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) [2021-12-16 22:59:43,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-16 22:59:43,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-16 22:59:43,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:59:43,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-16 22:59:43,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:59:43,323 INFO L388 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 16 treesize of output 12 [2021-12-16 22:59:43,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:43,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:59:43,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:43,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-16 22:59:43,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:43,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-16 22:59:43,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:43,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-16 22:59:43,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:43,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-16 22:59:43,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:43,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:43,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:43,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 22:59:43,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-12-16 22:59:43,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:43,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:43,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:43,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 22:59:43,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-12-16 22:59:43,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:59:43,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 22:59:43,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-12-16 22:59:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-16 22:59:43,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:59:56,405 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_215| Int) (v_ArrVal_460 Int)) (or (<= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 8) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4)) 0) (+ (* |v_ULTIMATE.start_main_~i~0#1_215| 8) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 8)) v_ArrVal_460) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) |c_ULTIMATE.start_main_~CCCELVOL2~0#1|) (< |v_ULTIMATE.start_main_~i~0#1_215| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-16 23:01:01,451 INFO L388 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 39 treesize of output 37 [2021-12-16 23:01:01,455 INFO L388 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 5900 treesize of output 5868 [2021-12-16 23:01:09,182 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 14 proven. 19 refuted. 3 times theorem prover too weak. 103 trivial. 3 not checked. [2021-12-16 23:01:09,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702525921] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:01:09,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:01:09,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 14] total 39 [2021-12-16 23:01:09,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547842049] [2021-12-16 23:01:09,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:01:09,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-16 23:01:09,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:01:09,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-16 23:01:09,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1216, Unknown=30, NotChecked=72, Total=1482 [2021-12-16 23:01:09,184 INFO L87 Difference]: Start difference. First operand 167 states and 180 transitions. Second operand has 39 states, 39 states have (on average 2.8461538461538463) internal successors, (111), 39 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:01:14,228 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_206| Int)) (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_206| 8) (- 4))) 0) (<= (+ |v_ULTIMATE.start_main_~i~0#1_206| 1) |c_ULTIMATE.start_main_~i~0#1|) (<= 3 |v_ULTIMATE.start_main_~i~0#1_206|))) (< 3 |c_ULTIMATE.start_main_~MINVAL~0#1|) (<= 3 |c_ULTIMATE.start_main_~CCCELVOL2~0#1|) (<= 3 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_215| Int) (v_ArrVal_460 Int)) (or (<= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 8) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4)) 0) (+ (* |v_ULTIMATE.start_main_~i~0#1_215| 8) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 8)) v_ArrVal_460) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) |c_ULTIMATE.start_main_~CCCELVOL2~0#1|) (< |v_ULTIMATE.start_main_~i~0#1_215| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (= 0 |c_ULTIMATE.start_main_~#volArray~0#1.offset|)) is different from false [2021-12-16 23:01:14,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:01:14,783 INFO L93 Difference]: Finished difference Result 254 states and 277 transitions. [2021-12-16 23:01:14,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-16 23:01:14,783 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.8461538461538463) internal successors, (111), 39 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-16 23:01:14,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:01:14,784 INFO L225 Difference]: With dead ends: 254 [2021-12-16 23:01:14,784 INFO L226 Difference]: Without dead ends: 214 [2021-12-16 23:01:14,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 109 SyntacticMatches, 14 SemanticMatches, 64 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 87.0s TimeCoverageRelationStatistics Valid=625, Invalid=3378, Unknown=37, NotChecked=250, Total=4290 [2021-12-16 23:01:14,785 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 273 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 23:01:14,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 503 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 615 Invalid, 0 Unknown, 260 Unchecked, 0.3s Time] [2021-12-16 23:01:14,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-16 23:01:14,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 204. [2021-12-16 23:01:14,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0788177339901477) internal successors, (219), 203 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:01:14,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 219 transitions. [2021-12-16 23:01:14,797 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 219 transitions. Word has length 65 [2021-12-16 23:01:14,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:01:14,797 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 219 transitions. [2021-12-16 23:01:14,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.8461538461538463) internal successors, (111), 39 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:01:14,797 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 219 transitions. [2021-12-16 23:01:14,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 23:01:14,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:01:14,798 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:01:14,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-16 23:01:14,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:01:14,998 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:01:14,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:01:14,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1158782919, now seen corresponding path program 4 times [2021-12-16 23:01:14,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:01:14,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809064338] [2021-12-16 23:01:14,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:01:14,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:01:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:01:15,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:01:15,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809064338] [2021-12-16 23:01:15,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809064338] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:01:15,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217208611] [2021-12-16 23:01:15,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 23:01:15,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:01:15,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:01:15,197 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) [2021-12-16 23:01:15,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-16 23:01:15,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 23:01:15,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:01:15,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-16 23:01:15,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:01:15,350 INFO L388 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 16 treesize of output 12 [2021-12-16 23:01:15,366 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:01:15,366 INFO L388 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 29 treesize of output 28 [2021-12-16 23:01:15,646 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-16 23:01:15,647 INFO L388 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 42 treesize of output 20 [2021-12-16 23:01:15,664 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:01:15,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:01:15,800 INFO L388 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 17 treesize of output 15 [2021-12-16 23:01:15,802 INFO L388 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 30 treesize of output 26 [2021-12-16 23:01:15,853 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:01:15,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217208611] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:01:15,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:01:15,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 24 [2021-12-16 23:01:15,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737645096] [2021-12-16 23:01:15,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:01:15,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-16 23:01:15,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:01:15,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-16 23:01:15,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-12-16 23:01:15,855 INFO L87 Difference]: Start difference. First operand 204 states and 219 transitions. Second operand has 24 states, 24 states have (on average 4.625) internal successors, (111), 24 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:01:17,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:01:17,332 INFO L93 Difference]: Finished difference Result 345 states and 375 transitions. [2021-12-16 23:01:17,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-12-16 23:01:17,332 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.625) internal successors, (111), 24 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-16 23:01:17,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:01:17,333 INFO L225 Difference]: With dead ends: 345 [2021-12-16 23:01:17,333 INFO L226 Difference]: Without dead ends: 343 [2021-12-16 23:01:17,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 116 SyntacticMatches, 8 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=819, Invalid=7923, Unknown=0, NotChecked=0, Total=8742 [2021-12-16 23:01:17,334 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 289 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 23:01:17,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 402 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1408 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 23:01:17,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-12-16 23:01:17,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 210. [2021-12-16 23:01:17,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.0813397129186604) internal successors, (226), 209 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:01:17,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 226 transitions. [2021-12-16 23:01:17,350 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 226 transitions. Word has length 65 [2021-12-16 23:01:17,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:01:17,350 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 226 transitions. [2021-12-16 23:01:17,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.625) internal successors, (111), 24 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:01:17,350 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 226 transitions. [2021-12-16 23:01:17,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-16 23:01:17,351 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:01:17,351 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:01:17,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-16 23:01:17,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:01:17,555 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:01:17,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:01:17,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1975375134, now seen corresponding path program 10 times [2021-12-16 23:01:17,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:01:17,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072384433] [2021-12-16 23:01:17,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:01:17,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:01:17,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 14 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:01:17,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:01:17,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072384433] [2021-12-16 23:01:17,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072384433] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:01:17,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605695031] [2021-12-16 23:01:17,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 23:01:17,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:01:17,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:01:17,844 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) [2021-12-16 23:01:17,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-16 23:01:17,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 23:01:17,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:01:17,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-16 23:01:17,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:01:18,085 INFO L388 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 [2021-12-16 23:01:18,407 INFO L388 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 [2021-12-16 23:01:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 14 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:01:18,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:01:18,650 INFO L388 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 17 treesize of output 15 [2021-12-16 23:01:18,652 INFO L388 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 34 treesize of output 30 [2021-12-16 23:01:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 14 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:01:18,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605695031] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:01:18,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:01:18,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 41 [2021-12-16 23:01:18,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675349399] [2021-12-16 23:01:18,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:01:18,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-16 23:01:18,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:01:18,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-16 23:01:18,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1514, Unknown=0, NotChecked=0, Total=1640 [2021-12-16 23:01:18,743 INFO L87 Difference]: Start difference. First operand 210 states and 226 transitions. Second operand has 41 states, 41 states have (on average 4.390243902439025) internal successors, (180), 41 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:01:21,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:01:21,615 INFO L93 Difference]: Finished difference Result 400 states and 428 transitions. [2021-12-16 23:01:21,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-16 23:01:21,616 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.390243902439025) internal successors, (180), 41 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-12-16 23:01:21,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:01:21,618 INFO L225 Difference]: With dead ends: 400 [2021-12-16 23:01:21,618 INFO L226 Difference]: Without dead ends: 390 [2021-12-16 23:01:21,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3143 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1162, Invalid=10828, Unknown=0, NotChecked=0, Total=11990 [2021-12-16 23:01:21,619 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 405 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 1950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 23:01:21,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 645 Invalid, 1950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 1689 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-16 23:01:21,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-12-16 23:01:21,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 216. [2021-12-16 23:01:21,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.0790697674418606) internal successors, (232), 215 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:01:21,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 232 transitions. [2021-12-16 23:01:21,636 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 232 transitions. Word has length 71 [2021-12-16 23:01:21,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:01:21,636 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 232 transitions. [2021-12-16 23:01:21,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.390243902439025) internal successors, (180), 41 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:01:21,643 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 232 transitions. [2021-12-16 23:01:21,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-16 23:01:21,644 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:01:21,644 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:01:21,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-16 23:01:21,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:01:21,855 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:01:21,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:01:21,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1821094634, now seen corresponding path program 4 times [2021-12-16 23:01:21,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:01:21,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15155652] [2021-12-16 23:01:21,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:01:21,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:01:21,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:01:22,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:01:22,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15155652] [2021-12-16 23:01:22,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15155652] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:01:22,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43435672] [2021-12-16 23:01:22,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 23:01:22,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:01:22,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:01:22,064 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) [2021-12-16 23:01:22,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-16 23:01:22,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 23:01:22,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:01:22,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-16 23:01:22,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:01:22,184 INFO L388 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 16 treesize of output 12 [2021-12-16 23:01:22,500 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-16 23:01:22,500 INFO L388 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 42 treesize of output 20 [2021-12-16 23:01:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:01:22,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:01:22,678 INFO L388 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 17 treesize of output 15 [2021-12-16 23:01:22,680 INFO L388 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 30 treesize of output 26 [2021-12-16 23:01:22,740 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:01:22,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43435672] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:01:22,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:01:22,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 26 [2021-12-16 23:01:22,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349937042] [2021-12-16 23:01:22,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:01:22,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-16 23:01:22,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:01:22,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-16 23:01:22,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-12-16 23:01:22,742 INFO L87 Difference]: Start difference. First operand 216 states and 232 transitions. Second operand has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:01:25,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:01:25,884 INFO L93 Difference]: Finished difference Result 511 states and 558 transitions. [2021-12-16 23:01:25,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2021-12-16 23:01:25,885 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-12-16 23:01:25,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:01:25,886 INFO L225 Difference]: With dead ends: 511 [2021-12-16 23:01:25,886 INFO L226 Difference]: Without dead ends: 509 [2021-12-16 23:01:25,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 127 SyntacticMatches, 7 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10611 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1869, Invalid=25191, Unknown=0, NotChecked=0, Total=27060 [2021-12-16 23:01:25,889 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 539 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 2515 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 2809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 2515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:01:25,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 695 Invalid, 2809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 2515 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-16 23:01:25,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-12-16 23:01:25,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 228. [2021-12-16 23:01:25,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.079295154185022) internal successors, (245), 227 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:01:25,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 245 transitions. [2021-12-16 23:01:25,907 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 245 transitions. Word has length 71 [2021-12-16 23:01:25,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:01:25,908 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 245 transitions. [2021-12-16 23:01:25,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:01:25,908 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 245 transitions. [2021-12-16 23:01:25,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-16 23:01:25,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:01:25,909 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:01:25,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-16 23:01:26,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-16 23:01:26,111 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:01:26,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:01:26,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1772484533, now seen corresponding path program 11 times [2021-12-16 23:01:26,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:01:26,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035409743] [2021-12-16 23:01:26,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:01:26,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:01:26,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:26,528 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 157 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:01:26,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:01:26,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035409743] [2021-12-16 23:01:26,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035409743] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:01:26,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949815711] [2021-12-16 23:01:26,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 23:01:26,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:01:26,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:01:26,529 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) [2021-12-16 23:01:26,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-16 23:01:26,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-16 23:01:26,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:01:26,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 23:01:26,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:01:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 200 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:01:27,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:01:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 200 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:01:27,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949815711] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:01:27,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:01:27,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 51 [2021-12-16 23:01:27,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511472038] [2021-12-16 23:01:27,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:01:27,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-16 23:01:27,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:01:27,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-16 23:01:27,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=1955, Unknown=0, NotChecked=0, Total=2550 [2021-12-16 23:01:27,824 INFO L87 Difference]: Start difference. First operand 228 states and 245 transitions. Second operand has 51 states, 51 states have (on average 4.2745098039215685) internal successors, (218), 51 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:01:28,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:01:28,178 INFO L93 Difference]: Finished difference Result 356 states and 381 transitions. [2021-12-16 23:01:28,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 23:01:28,178 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.2745098039215685) internal successors, (218), 51 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-16 23:01:28,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:01:28,179 INFO L225 Difference]: With dead ends: 356 [2021-12-16 23:01:28,179 INFO L226 Difference]: Without dead ends: 212 [2021-12-16 23:01:28,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=859, Invalid=2681, Unknown=0, NotChecked=0, Total=3540 [2021-12-16 23:01:28,181 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 326 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:01:28,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 316 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 23:01:28,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-16 23:01:28,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 203. [2021-12-16 23:01:28,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.0742574257425743) internal successors, (217), 202 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:01:28,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 217 transitions. [2021-12-16 23:01:28,202 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 217 transitions. Word has length 77 [2021-12-16 23:01:28,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:01:28,202 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 217 transitions. [2021-12-16 23:01:28,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.2745098039215685) internal successors, (218), 51 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:01:28,203 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 217 transitions. [2021-12-16 23:01:28,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-16 23:01:28,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:01:28,204 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:01:28,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-16 23:01:28,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-16 23:01:28,408 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:01:28,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:01:28,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1608818642, now seen corresponding path program 12 times [2021-12-16 23:01:28,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:01:28,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902869941] [2021-12-16 23:01:28,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:01:28,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:01:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 16 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:01:28,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:01:28,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902869941] [2021-12-16 23:01:28,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902869941] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:01:28,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462418172] [2021-12-16 23:01:28,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 23:01:28,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:01:28,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:01:28,744 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) [2021-12-16 23:01:28,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-16 23:01:28,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-16 23:01:28,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:01:28,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-16 23:01:28,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:01:29,197 INFO L388 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 16 treesize of output 12 [2021-12-16 23:01:29,228 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 23:01:29,229 INFO L388 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 23 treesize of output 22 [2021-12-16 23:01:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 16 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:01:29,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:01:30,095 INFO L388 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 25 treesize of output 23 [2021-12-16 23:01:30,098 INFO L388 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 88 treesize of output 84 [2021-12-16 23:01:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 16 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:01:30,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462418172] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:01:30,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:01:30,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 57 [2021-12-16 23:01:30,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214206104] [2021-12-16 23:01:30,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:01:30,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-16 23:01:30,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:01:30,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-16 23:01:30,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2956, Unknown=0, NotChecked=0, Total=3192 [2021-12-16 23:01:30,339 INFO L87 Difference]: Start difference. First operand 203 states and 217 transitions. Second operand has 57 states, 57 states have (on average 4.0701754385964914) internal successors, (232), 57 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:01:36,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:01:36,259 INFO L93 Difference]: Finished difference Result 441 states and 472 transitions. [2021-12-16 23:01:36,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-12-16 23:01:36,259 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 4.0701754385964914) internal successors, (232), 57 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-16 23:01:36,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:01:36,260 INFO L225 Difference]: With dead ends: 441 [2021-12-16 23:01:36,260 INFO L226 Difference]: Without dead ends: 431 [2021-12-16 23:01:36,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 127 SyntacticMatches, 30 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10891 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2530, Invalid=25526, Unknown=0, NotChecked=0, Total=28056 [2021-12-16 23:01:36,262 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 814 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 2790 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 3272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 2790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-16 23:01:36,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [814 Valid, 966 Invalid, 3272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 2790 Invalid, 0 Unknown, 94 Unchecked, 1.3s Time] [2021-12-16 23:01:36,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-12-16 23:01:36,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 215. [2021-12-16 23:01:36,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.074766355140187) internal successors, (230), 214 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:01:36,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 230 transitions. [2021-12-16 23:01:36,278 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 230 transitions. Word has length 81 [2021-12-16 23:01:36,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:01:36,278 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 230 transitions. [2021-12-16 23:01:36,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 4.0701754385964914) internal successors, (232), 57 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:01:36,279 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 230 transitions. [2021-12-16 23:01:36,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-16 23:01:36,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:01:36,280 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:01:36,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-16 23:01:36,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-16 23:01:36,491 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:01:36,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:01:36,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1499622616, now seen corresponding path program 5 times [2021-12-16 23:01:36,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:01:36,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748813369] [2021-12-16 23:01:36,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:01:36,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:01:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:36,790 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 58 proven. 185 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 23:01:36,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:01:36,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748813369] [2021-12-16 23:01:36,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748813369] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:01:36,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345903373] [2021-12-16 23:01:36,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 23:01:36,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:01:36,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:01:36,793 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) [2021-12-16 23:01:36,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-16 23:01:36,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-16 23:01:36,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:01:36,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-16 23:01:36,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:01:37,068 INFO L388 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 16 treesize of output 12 [2021-12-16 23:01:37,118 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:01:37,118 INFO L388 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 26 treesize of output 25 [2021-12-16 23:01:37,131 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:01:37,131 INFO L388 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 26 treesize of output 25 [2021-12-16 23:01:37,807 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-16 23:01:37,808 INFO L388 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 37 treesize of output 13 [2021-12-16 23:01:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 58 proven. 185 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 23:01:37,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:02:12,486 INFO L388 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 73 treesize of output 67 [2021-12-16 23:02:12,493 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-16 23:02:12,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 507 treesize of output 471 [2021-12-16 23:02:12,836 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 58 proven. 184 refuted. 1 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 23:02:12,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345903373] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:02:12,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:02:12,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 55 [2021-12-16 23:02:12,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349045913] [2021-12-16 23:02:12,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:02:12,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-16 23:02:12,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:02:12,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-16 23:02:12,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=2697, Unknown=17, NotChecked=0, Total=2970 [2021-12-16 23:02:12,838 INFO L87 Difference]: Start difference. First operand 215 states and 230 transitions. Second operand has 55 states, 55 states have (on average 3.6363636363636362) internal successors, (200), 55 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:16,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:02:16,424 INFO L93 Difference]: Finished difference Result 344 states and 367 transitions. [2021-12-16 23:02:16,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-16 23:02:16,424 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.6363636363636362) internal successors, (200), 55 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-16 23:02:16,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:02:16,425 INFO L225 Difference]: With dead ends: 344 [2021-12-16 23:02:16,425 INFO L226 Difference]: Without dead ends: 328 [2021-12-16 23:02:16,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 135 SyntacticMatches, 4 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4151 ImplicationChecksByTransitivity, 37.2s TimeCoverageRelationStatistics Valid=1249, Invalid=13496, Unknown=17, NotChecked=0, Total=14762 [2021-12-16 23:02:16,426 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 506 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 3375 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1494 SdHoareTripleChecker+Invalid, 3629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 3375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-16 23:02:16,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 1494 Invalid, 3629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 3375 Invalid, 0 Unknown, 64 Unchecked, 1.4s Time] [2021-12-16 23:02:16,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-12-16 23:02:16,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 251. [2021-12-16 23:02:16,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.068) internal successors, (267), 250 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:16,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 267 transitions. [2021-12-16 23:02:16,447 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 267 transitions. Word has length 81 [2021-12-16 23:02:16,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:02:16,447 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 267 transitions. [2021-12-16 23:02:16,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.6363636363636362) internal successors, (200), 55 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:16,447 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 267 transitions. [2021-12-16 23:02:16,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-16 23:02:16,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:02:16,448 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:02:16,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-16 23:02:16,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:02:16,654 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:02:16,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:02:16,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1892649626, now seen corresponding path program 6 times [2021-12-16 23:02:16,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:02:16,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032888829] [2021-12-16 23:02:16,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:02:16,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:02:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:02:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:02:16,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:02:16,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032888829] [2021-12-16 23:02:16,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032888829] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:02:16,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405691536] [2021-12-16 23:02:16,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 23:02:16,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:02:16,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:02:16,912 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) [2021-12-16 23:02:16,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-16 23:02:17,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-16 23:02:17,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:02:17,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-16 23:02:17,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:02:17,221 INFO L388 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 16 treesize of output 12 [2021-12-16 23:02:17,237 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:02:17,237 INFO L388 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 29 treesize of output 28 [2021-12-16 23:02:17,603 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-16 23:02:17,604 INFO L388 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 42 treesize of output 20 [2021-12-16 23:02:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:02:17,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:02:17,783 INFO L388 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 17 treesize of output 15 [2021-12-16 23:02:17,785 INFO L388 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 30 treesize of output 26 [2021-12-16 23:02:17,843 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:02:17,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405691536] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:02:17,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:02:17,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 29 [2021-12-16 23:02:17,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596850079] [2021-12-16 23:02:17,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:02:17,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-16 23:02:17,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:02:17,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-16 23:02:17,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-12-16 23:02:17,846 INFO L87 Difference]: Start difference. First operand 251 states and 267 transitions. Second operand has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:20,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:02:20,654 INFO L93 Difference]: Finished difference Result 562 states and 611 transitions. [2021-12-16 23:02:20,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-12-16 23:02:20,655 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-16 23:02:20,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:02:20,656 INFO L225 Difference]: With dead ends: 562 [2021-12-16 23:02:20,656 INFO L226 Difference]: Without dead ends: 560 [2021-12-16 23:02:20,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 146 SyntacticMatches, 8 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8304 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1618, Invalid=20732, Unknown=0, NotChecked=0, Total=22350 [2021-12-16 23:02:20,659 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 542 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 2241 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 2548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 2241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:02:20,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 566 Invalid, 2548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 2241 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-16 23:02:20,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-12-16 23:02:20,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 257. [2021-12-16 23:02:20,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.0703125) internal successors, (274), 256 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:20,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 274 transitions. [2021-12-16 23:02:20,681 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 274 transitions. Word has length 81 [2021-12-16 23:02:20,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:02:20,682 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 274 transitions. [2021-12-16 23:02:20,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:20,682 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 274 transitions. [2021-12-16 23:02:20,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-16 23:02:20,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:02:20,683 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:02:20,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-16 23:02:20,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:02:20,903 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:02:20,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:02:20,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1465713665, now seen corresponding path program 13 times [2021-12-16 23:02:20,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:02:20,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964352579] [2021-12-16 23:02:20,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:02:20,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:02:20,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:02:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 18 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:02:21,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:02:21,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964352579] [2021-12-16 23:02:21,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964352579] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:02:21,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794810091] [2021-12-16 23:02:21,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 23:02:21,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:02:21,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:02:21,216 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) [2021-12-16 23:02:21,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-16 23:02:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:02:21,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-16 23:02:21,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:02:21,470 INFO L388 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 [2021-12-16 23:02:21,911 INFO L388 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 [2021-12-16 23:02:21,918 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 18 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:02:21,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:02:22,265 INFO L388 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 17 treesize of output 15 [2021-12-16 23:02:22,267 INFO L388 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 34 treesize of output 30 [2021-12-16 23:02:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 18 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:02:22,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794810091] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:02:22,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:02:22,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 49 [2021-12-16 23:02:22,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704866145] [2021-12-16 23:02:22,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:02:22,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-16 23:02:22,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:02:22,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-16 23:02:22,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2202, Unknown=0, NotChecked=0, Total=2352 [2021-12-16 23:02:22,357 INFO L87 Difference]: Start difference. First operand 257 states and 274 transitions. Second operand has 49 states, 49 states have (on average 4.571428571428571) internal successors, (224), 49 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:27,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:02:27,394 INFO L93 Difference]: Finished difference Result 531 states and 563 transitions. [2021-12-16 23:02:27,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-12-16 23:02:27,395 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.571428571428571) internal successors, (224), 49 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-16 23:02:27,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:02:27,397 INFO L225 Difference]: With dead ends: 531 [2021-12-16 23:02:27,397 INFO L226 Difference]: Without dead ends: 521 [2021-12-16 23:02:27,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6446 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1870, Invalid=21082, Unknown=0, NotChecked=0, Total=22952 [2021-12-16 23:02:27,399 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 559 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 2660 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 3046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 2660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:02:27,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 1009 Invalid, 3046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 2660 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-16 23:02:27,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-12-16 23:02:27,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 263. [2021-12-16 23:02:27,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.0687022900763359) internal successors, (280), 262 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:27,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 280 transitions. [2021-12-16 23:02:27,430 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 280 transitions. Word has length 87 [2021-12-16 23:02:27,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:02:27,430 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 280 transitions. [2021-12-16 23:02:27,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.571428571428571) internal successors, (224), 49 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:27,431 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 280 transitions. [2021-12-16 23:02:27,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-16 23:02:27,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:02:27,432 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:02:27,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-16 23:02:27,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-16 23:02:27,647 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:02:27,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:02:27,648 INFO L85 PathProgramCache]: Analyzing trace with hash 839156875, now seen corresponding path program 5 times [2021-12-16 23:02:27,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:02:27,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91056712] [2021-12-16 23:02:27,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:02:27,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:02:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:02:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:02:27,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:02:27,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91056712] [2021-12-16 23:02:27,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91056712] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:02:27,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988379779] [2021-12-16 23:02:27,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 23:02:27,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:02:27,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:02:27,899 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) [2021-12-16 23:02:27,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-16 23:02:28,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-16 23:02:28,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:02:28,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-16 23:02:28,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:02:28,181 INFO L388 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 16 treesize of output 12 [2021-12-16 23:02:28,255 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:02:28,255 INFO L388 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 26 treesize of output 25 [2021-12-16 23:02:28,276 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:02:28,277 INFO L388 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 26 treesize of output 25 [2021-12-16 23:02:28,748 INFO L388 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 [2021-12-16 23:02:28,803 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 102 proven. 185 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 23:02:28,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:02:31,250 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_445| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_445| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_856 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_445| 8) (- 4)) v_ArrVal_856) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 28)) |c_ULTIMATE.start_main_~MINVAL~0#1|)))) is different from false [2021-12-16 23:02:31,262 INFO L388 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 25 treesize of output 23 [2021-12-16 23:02:31,264 INFO L388 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 88 treesize of output 84 [2021-12-16 23:02:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 102 proven. 181 refuted. 0 times theorem prover too weak. 10 trivial. 4 not checked. [2021-12-16 23:02:31,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988379779] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:02:31,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:02:31,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 20] total 55 [2021-12-16 23:02:31,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072244377] [2021-12-16 23:02:31,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:02:31,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-16 23:02:31,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:02:31,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-16 23:02:31,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2682, Unknown=1, NotChecked=104, Total=2970 [2021-12-16 23:02:31,532 INFO L87 Difference]: Start difference. First operand 263 states and 280 transitions. Second operand has 55 states, 55 states have (on average 4.254545454545455) internal successors, (234), 55 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:34,402 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse0 (select .cse1 (+ .cse2 |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)))) (and (= .cse0 0) (< 1 |c_ULTIMATE.start_main_~MINVAL~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_445| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_445| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_856 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_445| 8) (- 4)) v_ArrVal_856) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 28)) |c_ULTIMATE.start_main_~MINVAL~0#1|)))) (< .cse0 |c_ULTIMATE.start_main_~MINVAL~0#1|) (<= (select .cse1 (+ (* |c_ULTIMATE.start_main_~i~0#1| 8) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4))) 0) (= |c_ULTIMATE.start_main_~i~0#1| 4) (= (select .cse1 (+ .cse2 |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)) 0) (<= 1 |c_ULTIMATE.start_main_~CCCELVOL1~0#1|)))) is different from false [2021-12-16 23:02:36,419 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse4 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse0 (select .cse2 (+ .cse4 |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4))) (.cse1 (select .cse2 (+ .cse4 |c_ULTIMATE.start_main_~#volArray~0#1.offset| 8))) (.cse3 (select .cse2 (+ .cse4 |c_ULTIMATE.start_main_~#volArray~0#1.offset|)))) (and (= .cse0 0) (< 1 |c_ULTIMATE.start_main_~MINVAL~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_445| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_445| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_856 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_445| 8) (- 4)) v_ArrVal_856) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 28)) |c_ULTIMATE.start_main_~MINVAL~0#1|)))) (< .cse1 |c_ULTIMATE.start_main_~MINVAL~0#1|) (< .cse0 |c_ULTIMATE.start_main_~MINVAL~0#1|) (<= (select .cse2 (+ (* |c_ULTIMATE.start_main_~i~0#1| 8) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4))) 0) (= .cse1 0) (= .cse3 0) (= |c_ULTIMATE.start_main_~i~0#1| 4) (< .cse3 |c_ULTIMATE.start_main_~MINVAL~0#1|) (= (select .cse2 (+ .cse4 |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)) 0) (<= 1 |c_ULTIMATE.start_main_~CCCELVOL1~0#1|)))) is different from false [2021-12-16 23:02:40,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:02:40,391 INFO L93 Difference]: Finished difference Result 469 states and 507 transitions. [2021-12-16 23:02:40,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-12-16 23:02:40,392 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 4.254545454545455) internal successors, (234), 55 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-16 23:02:40,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:02:40,393 INFO L225 Difference]: With dead ends: 469 [2021-12-16 23:02:40,393 INFO L226 Difference]: Without dead ends: 453 [2021-12-16 23:02:40,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 150 SyntacticMatches, 3 SemanticMatches, 147 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 6306 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1583, Invalid=19596, Unknown=3, NotChecked=870, Total=22052 [2021-12-16 23:02:40,395 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 684 mSDsluCounter, 1526 mSDsCounter, 0 mSdLazyCounter, 5622 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 1591 SdHoareTripleChecker+Invalid, 6312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 5622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:02:40,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 1591 Invalid, 6312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 5622 Invalid, 0 Unknown, 247 Unchecked, 2.2s Time] [2021-12-16 23:02:40,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-12-16 23:02:40,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 298. [2021-12-16 23:02:40,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 1.0707070707070707) internal successors, (318), 297 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:40,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 318 transitions. [2021-12-16 23:02:40,423 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 318 transitions. Word has length 87 [2021-12-16 23:02:40,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:02:40,424 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 318 transitions. [2021-12-16 23:02:40,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 4.254545454545455) internal successors, (234), 55 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:40,424 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 318 transitions. [2021-12-16 23:02:40,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-16 23:02:40,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:02:40,425 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:02:40,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-16 23:02:40,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-16 23:02:40,639 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:02:40,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:02:40,640 INFO L85 PathProgramCache]: Analyzing trace with hash 190528916, now seen corresponding path program 14 times [2021-12-16 23:02:40,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:02:40,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640154882] [2021-12-16 23:02:40,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:02:40,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:02:40,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:02:41,125 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 255 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:02:41,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:02:41,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640154882] [2021-12-16 23:02:41,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640154882] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:02:41,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631409374] [2021-12-16 23:02:41,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 23:02:41,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:02:41,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:02:41,127 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) [2021-12-16 23:02:41,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-16 23:02:41,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 23:02:41,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:02:41,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-16 23:02:41,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:02:42,246 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 310 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:02:42,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:02:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 310 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:02:42,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631409374] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:02:42,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:02:42,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 21] total 61 [2021-12-16 23:02:42,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006396230] [2021-12-16 23:02:42,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:02:42,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-16 23:02:42,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:02:42,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-16 23:02:42,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=834, Invalid=2826, Unknown=0, NotChecked=0, Total=3660 [2021-12-16 23:02:42,736 INFO L87 Difference]: Start difference. First operand 298 states and 318 transitions. Second operand has 61 states, 61 states have (on average 4.377049180327869) internal successors, (267), 61 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:43,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:02:43,164 INFO L93 Difference]: Finished difference Result 492 states and 522 transitions. [2021-12-16 23:02:43,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-16 23:02:43,164 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 4.377049180327869) internal successors, (267), 61 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-16 23:02:43,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:02:43,165 INFO L225 Difference]: With dead ends: 492 [2021-12-16 23:02:43,165 INFO L226 Difference]: Without dead ends: 312 [2021-12-16 23:02:43,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1173, Invalid=3797, Unknown=0, NotChecked=0, Total=4970 [2021-12-16 23:02:43,166 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 471 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:02:43,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 408 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 23:02:43,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-12-16 23:02:43,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 306. [2021-12-16 23:02:43,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.0655737704918034) internal successors, (325), 305 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:43,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 325 transitions. [2021-12-16 23:02:43,184 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 325 transitions. Word has length 93 [2021-12-16 23:02:43,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:02:43,184 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 325 transitions. [2021-12-16 23:02:43,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 4.377049180327869) internal successors, (267), 61 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:43,184 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 325 transitions. [2021-12-16 23:02:43,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-16 23:02:43,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:02:43,185 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:02:43,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-16 23:02:43,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:02:43,386 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:02:43,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:02:43,386 INFO L85 PathProgramCache]: Analyzing trace with hash -632646643, now seen corresponding path program 15 times [2021-12-16 23:02:43,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:02:43,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267888702] [2021-12-16 23:02:43,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:02:43,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:02:43,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:02:43,750 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 20 proven. 356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:02:43,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:02:43,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267888702] [2021-12-16 23:02:43,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267888702] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:02:43,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096427672] [2021-12-16 23:02:43,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 23:02:43,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:02:43,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:02:43,753 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) [2021-12-16 23:02:43,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-16 23:02:44,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-16 23:02:44,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:02:44,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-16 23:02:44,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:02:44,373 INFO L388 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 16 treesize of output 12 [2021-12-16 23:02:44,405 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 23:02:44,405 INFO L388 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 23 treesize of output 22 [2021-12-16 23:02:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 20 proven. 356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:02:45,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:02:45,546 INFO L388 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 25 treesize of output 23 [2021-12-16 23:02:45,548 INFO L388 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 200 treesize of output 192 [2021-12-16 23:02:45,851 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 20 proven. 356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:02:45,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096427672] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:02:45,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:02:45,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 66 [2021-12-16 23:02:45,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130572065] [2021-12-16 23:02:45,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:02:45,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-16 23:02:45,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:02:45,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-16 23:02:45,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=4015, Unknown=0, NotChecked=0, Total=4290 [2021-12-16 23:02:45,853 INFO L87 Difference]: Start difference. First operand 306 states and 325 transitions. Second operand has 66 states, 66 states have (on average 4.242424242424242) internal successors, (280), 66 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:55,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:02:55,760 INFO L93 Difference]: Finished difference Result 640 states and 678 transitions. [2021-12-16 23:02:55,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-12-16 23:02:55,761 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 4.242424242424242) internal successors, (280), 66 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-16 23:02:55,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:02:55,762 INFO L225 Difference]: With dead ends: 640 [2021-12-16 23:02:55,762 INFO L226 Difference]: Without dead ends: 630 [2021-12-16 23:02:55,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 153 SyntacticMatches, 52 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20620 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=3791, Invalid=43951, Unknown=0, NotChecked=0, Total=47742 [2021-12-16 23:02:55,765 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 1112 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 3768 mSolverCounterSat, 552 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1112 SdHoareTripleChecker+Valid, 1269 SdHoareTripleChecker+Invalid, 4445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 552 IncrementalHoareTripleChecker+Valid, 3768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-16 23:02:55,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1112 Valid, 1269 Invalid, 4445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [552 Valid, 3768 Invalid, 0 Unknown, 125 Unchecked, 1.8s Time] [2021-12-16 23:02:55,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-12-16 23:02:55,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 318. [2021-12-16 23:02:55,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 1.0630914826498423) internal successors, (337), 317 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:55,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 337 transitions. [2021-12-16 23:02:55,803 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 337 transitions. Word has length 97 [2021-12-16 23:02:55,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:02:55,804 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 337 transitions. [2021-12-16 23:02:55,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 4.242424242424242) internal successors, (280), 66 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:55,804 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 337 transitions. [2021-12-16 23:02:55,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-16 23:02:55,805 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:02:55,806 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 7, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:02:55,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-16 23:02:56,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:02:56,020 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:02:56,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:02:56,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1413909631, now seen corresponding path program 7 times [2021-12-16 23:02:56,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:02:56,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280669898] [2021-12-16 23:02:56,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:02:56,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:02:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:02:56,333 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:02:56,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:02:56,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280669898] [2021-12-16 23:02:56,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280669898] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:02:56,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994830124] [2021-12-16 23:02:56,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 23:02:56,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:02:56,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:02:56,336 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) [2021-12-16 23:02:56,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-16 23:02:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:02:56,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-16 23:02:56,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:02:56,532 INFO L388 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 16 treesize of output 12 [2021-12-16 23:02:56,546 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:02:56,547 INFO L388 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 29 treesize of output 28 [2021-12-16 23:02:57,021 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-16 23:02:57,021 INFO L388 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 42 treesize of output 20 [2021-12-16 23:02:57,047 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:02:57,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:02:57,237 INFO L388 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 17 treesize of output 15 [2021-12-16 23:02:57,240 INFO L388 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 30 treesize of output 26 [2021-12-16 23:02:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:02:57,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994830124] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:02:57,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:02:57,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 34 [2021-12-16 23:02:57,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370256881] [2021-12-16 23:02:57,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:02:57,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-16 23:02:57,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:02:57,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-16 23:02:57,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1028, Unknown=0, NotChecked=0, Total=1122 [2021-12-16 23:02:57,323 INFO L87 Difference]: Start difference. First operand 318 states and 337 transitions. Second operand has 34 states, 34 states have (on average 4.911764705882353) internal successors, (167), 34 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:03:01,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:03:01,922 INFO L93 Difference]: Finished difference Result 710 states and 769 transitions. [2021-12-16 23:03:01,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2021-12-16 23:03:01,923 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.911764705882353) internal successors, (167), 34 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-16 23:03:01,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:03:01,924 INFO L225 Difference]: With dead ends: 710 [2021-12-16 23:03:01,924 INFO L226 Difference]: Without dead ends: 708 [2021-12-16 23:03:01,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 176 SyntacticMatches, 8 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18586 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2741, Invalid=44131, Unknown=0, NotChecked=0, Total=46872 [2021-12-16 23:03:01,928 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 844 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 3258 mSolverCounterSat, 474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 3732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 3258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-16 23:03:01,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 772 Invalid, 3732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [474 Valid, 3258 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-16 23:03:01,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-12-16 23:03:01,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 324. [2021-12-16 23:03:01,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.065015479876161) internal successors, (344), 323 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:03:01,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 344 transitions. [2021-12-16 23:03:01,966 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 344 transitions. Word has length 97 [2021-12-16 23:03:01,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:03:01,966 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 344 transitions. [2021-12-16 23:03:01,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.911764705882353) internal successors, (167), 34 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:03:01,967 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 344 transitions. [2021-12-16 23:03:01,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-16 23:03:01,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:03:01,968 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:03:01,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-16 23:03:02,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:03:02,173 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:03:02,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:03:02,173 INFO L85 PathProgramCache]: Analyzing trace with hash -458779488, now seen corresponding path program 16 times [2021-12-16 23:03:02,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:03:02,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493458310] [2021-12-16 23:03:02,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:03:02,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:03:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:03:02,584 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 22 proven. 418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:03:02,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:03:02,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493458310] [2021-12-16 23:03:02,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493458310] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:03:02,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144690987] [2021-12-16 23:03:02,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 23:03:02,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:03:02,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:03:02,588 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) [2021-12-16 23:03:02,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-16 23:03:02,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 23:03:02,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:03:02,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-16 23:03:02,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:03:02,915 INFO L388 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 [2021-12-16 23:03:03,493 INFO L388 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 [2021-12-16 23:03:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 22 proven. 418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:03:03,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:03:03,941 INFO L388 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 17 treesize of output 15 [2021-12-16 23:03:03,943 INFO L388 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 34 treesize of output 30 [2021-12-16 23:03:04,045 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 22 proven. 418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:03:04,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144690987] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:03:04,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:03:04,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 57 [2021-12-16 23:03:04,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256708356] [2021-12-16 23:03:04,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:03:04,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-16 23:03:04,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:03:04,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-16 23:03:04,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3018, Unknown=0, NotChecked=0, Total=3192 [2021-12-16 23:03:04,047 INFO L87 Difference]: Start difference. First operand 324 states and 344 transitions. Second operand has 57 states, 57 states have (on average 4.701754385964913) internal successors, (268), 57 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:03:11,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:03:11,908 INFO L93 Difference]: Finished difference Result 706 states and 744 transitions. [2021-12-16 23:03:11,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-12-16 23:03:11,909 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 4.701754385964913) internal successors, (268), 57 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-12-16 23:03:11,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:03:11,910 INFO L225 Difference]: With dead ends: 706 [2021-12-16 23:03:11,910 INFO L226 Difference]: Without dead ends: 696 [2021-12-16 23:03:11,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11833 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2798, Invalid=37002, Unknown=0, NotChecked=0, Total=39800 [2021-12-16 23:03:11,913 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 882 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 3215 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 3806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 3215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-16 23:03:11,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [882 Valid, 1207 Invalid, 3806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 3215 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-16 23:03:11,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-12-16 23:03:11,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 330. [2021-12-16 23:03:11,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 1.0638297872340425) internal successors, (350), 329 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:03:11,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 350 transitions. [2021-12-16 23:03:11,943 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 350 transitions. Word has length 103 [2021-12-16 23:03:11,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:03:11,943 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 350 transitions. [2021-12-16 23:03:11,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 4.701754385964913) internal successors, (268), 57 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:03:11,943 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 350 transitions. [2021-12-16 23:03:11,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-16 23:03:11,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:03:11,944 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 9, 6, 6, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:03:11,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-16 23:03:12,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-16 23:03:12,152 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:03:12,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:03:12,152 INFO L85 PathProgramCache]: Analyzing trace with hash 134406440, now seen corresponding path program 6 times [2021-12-16 23:03:12,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:03:12,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864501807] [2021-12-16 23:03:12,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:03:12,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:03:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:03:12,451 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:03:12,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:03:12,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864501807] [2021-12-16 23:03:12,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864501807] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:03:12,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621262510] [2021-12-16 23:03:12,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 23:03:12,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:03:12,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:03:12,455 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) [2021-12-16 23:03:12,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-16 23:03:12,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-16 23:03:12,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:03:12,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-16 23:03:12,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:03:12,791 INFO L388 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 16 treesize of output 12 [2021-12-16 23:03:12,857 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:03:12,858 INFO L388 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 26 treesize of output 25 [2021-12-16 23:03:12,872 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:03:12,872 INFO L388 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 26 treesize of output 25 [2021-12-16 23:03:12,983 INFO L354 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2021-12-16 23:03:12,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 40 [2021-12-16 23:03:13,011 INFO L354 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2021-12-16 23:03:13,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 40 [2021-12-16 23:03:13,089 INFO L354 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2021-12-16 23:03:13,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 40 [2021-12-16 23:03:13,118 INFO L354 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2021-12-16 23:03:13,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 40 [2021-12-16 23:03:13,750 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-12-16 23:03:13,751 INFO L388 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 31 treesize of output 10 [2021-12-16 23:03:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 211 proven. 127 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-16 23:03:13,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:06:57,590 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1134 Int) (|v_ULTIMATE.start_main_~i~0#1_608| Int)) (or (<= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 8) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4)) 0) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_608| 8) (- 4)) v_ArrVal_1134) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) |c_ULTIMATE.start_main_~CCCELVOL1~0#1|) (< |v_ULTIMATE.start_main_~i~0#1_608| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-16 23:08:00,088 INFO L388 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 41 treesize of output 39 [2021-12-16 23:08:00,093 INFO L388 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 1720 treesize of output 1704 [2021-12-16 23:08:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 206 proven. 126 refuted. 0 times theorem prover too weak. 103 trivial. 5 not checked. [2021-12-16 23:08:02,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621262510] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:08:02,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:08:02,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 20] total 58 [2021-12-16 23:08:02,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597454896] [2021-12-16 23:08:02,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:08:02,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-16 23:08:02,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:08:02,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-16 23:08:02,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2875, Unknown=107, NotChecked=110, Total=3306 [2021-12-16 23:08:02,607 INFO L87 Difference]: Start difference. First operand 330 states and 350 transitions. Second operand has 58 states, 58 states have (on average 4.0344827586206895) internal successors, (234), 58 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:08:08,500 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|))) (let ((.cse0 (select .cse2 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4))) (.cse1 (select .cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)))) (and (= .cse0 0) (< .cse1 |c_ULTIMATE.start_main_~MINVAL~0#1|) (< .cse0 |c_ULTIMATE.start_main_~MINVAL~0#1|) (forall ((v_ArrVal_1134 Int) (|v_ULTIMATE.start_main_~i~0#1_608| Int)) (or (<= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 8) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4)) 0) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_608| 8) (- 4)) v_ArrVal_1134) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) |c_ULTIMATE.start_main_~CCCELVOL1~0#1|) (< |v_ULTIMATE.start_main_~i~0#1_608| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= 4 |c_ULTIMATE.start_main_~i~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 4) (<= 1 |c_ULTIMATE.start_main_~CCCELVOL1~0#1|) (= .cse1 0)))) is different from false [2021-12-16 23:08:11,602 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1134 Int) (|v_ULTIMATE.start_main_~i~0#1_608| Int)) (or (<= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 8) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4)) 0) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_608| 8) (- 4)) v_ArrVal_1134) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) |c_ULTIMATE.start_main_~CCCELVOL1~0#1|) (< |v_ULTIMATE.start_main_~i~0#1_608| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (exists ((|v_ULTIMATE.start_main_~i~0#1_588| Int)) (and (<= (+ |v_ULTIMATE.start_main_~i~0#1_588| 1) |c_ULTIMATE.start_main_~i~0#1|) (<= 4 |v_ULTIMATE.start_main_~i~0#1_588|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_588| 8) (- 4))) 0))) (<= 1 |c_ULTIMATE.start_main_~CCCELVOL1~0#1|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) 0) (<= |c_ULTIMATE.start_main_~i~0#1| 5) (<= 5 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2021-12-16 23:08:12,357 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~i~0#1_588| Int)) (and (<= 4 |v_ULTIMATE.start_main_~i~0#1_588|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_588| 8) (- 4))) 0) (<= (+ |v_ULTIMATE.start_main_~i~0#1_588| 2) |c_ULTIMATE.start_main_~i~0#1|))) (forall ((v_ArrVal_1134 Int) (|v_ULTIMATE.start_main_~i~0#1_608| Int)) (or (<= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 8) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4)) 0) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_608| 8) (- 4)) v_ArrVal_1134) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) |c_ULTIMATE.start_main_~CCCELVOL1~0#1|) (< |v_ULTIMATE.start_main_~i~0#1_608| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= |c_ULTIMATE.start_main_~i~0#1| 6) (<= 1 |c_ULTIMATE.start_main_~CCCELVOL1~0#1|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) 0) (<= 6 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2021-12-16 23:08:23,860 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~i~0#1_588| Int)) (and (<= 4 |v_ULTIMATE.start_main_~i~0#1_588|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_588| 8) (- 4))) 0) (<= (+ |v_ULTIMATE.start_main_~i~0#1_588| 2) |c_ULTIMATE.start_main_~i~0#1|))) (forall ((v_ArrVal_1134 Int) (|v_ULTIMATE.start_main_~i~0#1_608| Int)) (or (<= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 8) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4)) 0) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_608| 8) (- 4)) v_ArrVal_1134) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) |c_ULTIMATE.start_main_~CCCELVOL1~0#1|) (< |v_ULTIMATE.start_main_~i~0#1_608| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= 1 |c_ULTIMATE.start_main_~CCCELVOL1~0#1|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) 0)) is different from false [2021-12-16 23:09:04,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:09:04,852 INFO L93 Difference]: Finished difference Result 507 states and 539 transitions. [2021-12-16 23:09:04,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-12-16 23:09:04,853 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 4.0344827586206895) internal successors, (234), 58 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-12-16 23:09:04,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:09:04,854 INFO L225 Difference]: With dead ends: 507 [2021-12-16 23:09:04,854 INFO L226 Difference]: Without dead ends: 467 [2021-12-16 23:09:04,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 186 SyntacticMatches, 11 SemanticMatches, 133 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 5014 ImplicationChecksByTransitivity, 350.0s TimeCoverageRelationStatistics Valid=1141, Invalid=15504, Unknown=145, NotChecked=1300, Total=18090 [2021-12-16 23:09:04,856 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 294 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 2467 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 3888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 2467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1171 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:09:04,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 832 Invalid, 3888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 2467 Invalid, 0 Unknown, 1171 Unchecked, 1.0s Time] [2021-12-16 23:09:04,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-12-16 23:09:04,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 354. [2021-12-16 23:09:04,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 1.0623229461756374) internal successors, (375), 353 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:09:04,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 375 transitions. [2021-12-16 23:09:04,888 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 375 transitions. Word has length 103 [2021-12-16 23:09:04,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:09:04,889 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 375 transitions. [2021-12-16 23:09:04,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 4.0344827586206895) internal successors, (234), 58 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:09:04,889 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 375 transitions. [2021-12-16 23:09:04,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-16 23:09:04,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:09:04,890 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 8, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:09:04,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-16 23:09:05,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-16 23:09:05,111 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:09:05,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:09:05,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1237400858, now seen corresponding path program 7 times [2021-12-16 23:09:05,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:09:05,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132822529] [2021-12-16 23:09:05,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:09:05,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:09:05,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:09:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 106 proven. 44 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2021-12-16 23:09:05,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:09:05,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132822529] [2021-12-16 23:09:05,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132822529] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:09:05,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031197640] [2021-12-16 23:09:05,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 23:09:05,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:09:05,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:09:05,518 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) [2021-12-16 23:09:05,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-16 23:09:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:09:05,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-16 23:09:05,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:09:05,707 INFO L388 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 [2021-12-16 23:09:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:09:06,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:09:06,592 INFO L388 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 17 treesize of output 15 [2021-12-16 23:09:06,594 INFO L388 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 30 treesize of output 26 [2021-12-16 23:09:06,641 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:09:06,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031197640] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:09:06,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:09:06,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23, 23] total 47 [2021-12-16 23:09:06,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53810713] [2021-12-16 23:09:06,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:09:06,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-16 23:09:06,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:09:06,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-16 23:09:06,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2010, Unknown=0, NotChecked=0, Total=2162 [2021-12-16 23:09:06,643 INFO L87 Difference]: Start difference. First operand 354 states and 375 transitions. Second operand has 47 states, 47 states have (on average 4.638297872340425) internal successors, (218), 47 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:09:21,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:09:21,860 INFO L93 Difference]: Finished difference Result 1093 states and 1182 transitions. [2021-12-16 23:09:21,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 316 states. [2021-12-16 23:09:21,860 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 4.638297872340425) internal successors, (218), 47 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-12-16 23:09:21,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:09:21,862 INFO L225 Difference]: With dead ends: 1093 [2021-12-16 23:09:21,862 INFO L226 Difference]: Without dead ends: 1005 [2021-12-16 23:09:21,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 181 SyntacticMatches, 3 SemanticMatches, 356 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51232 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=7246, Invalid=120560, Unknown=0, NotChecked=0, Total=127806 [2021-12-16 23:09:21,868 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 2043 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 7063 mSolverCounterSat, 1061 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2043 SdHoareTripleChecker+Valid, 1453 SdHoareTripleChecker+Invalid, 8124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1061 IncrementalHoareTripleChecker+Valid, 7063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-16 23:09:21,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2043 Valid, 1453 Invalid, 8124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1061 Valid, 7063 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-16 23:09:21,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-12-16 23:09:21,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 417. [2021-12-16 23:09:21,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 1.0673076923076923) internal successors, (444), 416 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:09:21,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 444 transitions. [2021-12-16 23:09:21,911 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 444 transitions. Word has length 103 [2021-12-16 23:09:21,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:09:21,912 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 444 transitions. [2021-12-16 23:09:21,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 4.638297872340425) internal successors, (218), 47 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:09:21,912 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 444 transitions. [2021-12-16 23:09:21,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-16 23:09:21,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:09:21,913 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:09:21,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-16 23:09:22,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-16 23:09:22,134 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:09:22,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:09:22,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1433967347, now seen corresponding path program 17 times [2021-12-16 23:09:22,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:09:22,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028459525] [2021-12-16 23:09:22,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:09:22,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:09:22,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:09:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 377 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:09:22,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:09:22,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028459525] [2021-12-16 23:09:22,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028459525] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:09:22,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330673921] [2021-12-16 23:09:22,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 23:09:22,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:09:22,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:09:22,825 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) [2021-12-16 23:09:22,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-16 23:09:23,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-16 23:09:23,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:09:23,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 23:09:23,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:09:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 444 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:09:24,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:09:24,874 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 444 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:09:24,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330673921] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:09:24,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:09:24,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 24] total 70 [2021-12-16 23:09:24,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448237356] [2021-12-16 23:09:24,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:09:24,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-16 23:09:24,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:09:24,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-16 23:09:24,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-12-16 23:09:24,876 INFO L87 Difference]: Start difference. First operand 417 states and 444 transitions. Second operand has 70 states, 70 states have (on average 4.5) internal successors, (315), 70 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:09:25,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:09:25,373 INFO L93 Difference]: Finished difference Result 647 states and 683 transitions. [2021-12-16 23:09:25,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-16 23:09:25,373 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 4.5) internal successors, (315), 70 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-12-16 23:09:25,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:09:25,375 INFO L225 Difference]: With dead ends: 647 [2021-12-16 23:09:25,375 INFO L226 Difference]: Without dead ends: 431 [2021-12-16 23:09:25,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2634 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1500, Invalid=4980, Unknown=0, NotChecked=0, Total=6480 [2021-12-16 23:09:25,376 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 637 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:09:25,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 348 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 23:09:25,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-12-16 23:09:25,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 425. [2021-12-16 23:09:25,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 1.0636792452830188) internal successors, (451), 424 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:09:25,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 451 transitions. [2021-12-16 23:09:25,412 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 451 transitions. Word has length 109 [2021-12-16 23:09:25,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:09:25,412 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 451 transitions. [2021-12-16 23:09:25,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 4.5) internal successors, (315), 70 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:09:25,412 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 451 transitions. [2021-12-16 23:09:25,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-16 23:09:25,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:09:25,413 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:09:25,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-16 23:09:25,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-16 23:09:25,627 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:09:25,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:09:25,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1757028500, now seen corresponding path program 18 times [2021-12-16 23:09:25,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:09:25,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217151661] [2021-12-16 23:09:25,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:09:25,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:09:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:09:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 24 proven. 511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:09:26,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:09:26,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217151661] [2021-12-16 23:09:26,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217151661] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:09:26,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489352444] [2021-12-16 23:09:26,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 23:09:26,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:09:26,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:09:26,267 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) [2021-12-16 23:09:26,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-16 23:09:26,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-16 23:09:26,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:09:26,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-16 23:09:26,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:09:26,811 INFO L388 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 16 treesize of output 12 [2021-12-16 23:09:26,843 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 23:09:26,843 INFO L388 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 23 treesize of output 22 [2021-12-16 23:09:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 24 proven. 511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:09:27,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:09:28,486 INFO L388 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 25 treesize of output 23 [2021-12-16 23:09:28,488 INFO L388 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 88 treesize of output 84 [2021-12-16 23:09:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 24 proven. 511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:09:28,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489352444] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:09:28,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:09:28,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 75 [2021-12-16 23:09:28,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841893489] [2021-12-16 23:09:28,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:09:28,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-16 23:09:28,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:09:28,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-16 23:09:28,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=5234, Unknown=0, NotChecked=0, Total=5550 [2021-12-16 23:09:28,866 INFO L87 Difference]: Start difference. First operand 425 states and 451 transitions. Second operand has 75 states, 75 states have (on average 4.386666666666667) internal successors, (329), 75 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:09:50,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:09:50,891 INFO L93 Difference]: Finished difference Result 885 states and 934 transitions. [2021-12-16 23:09:50,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2021-12-16 23:09:50,891 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 4.386666666666667) internal successors, (329), 75 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-12-16 23:09:50,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:09:50,893 INFO L225 Difference]: With dead ends: 885 [2021-12-16 23:09:50,893 INFO L226 Difference]: Without dead ends: 875 [2021-12-16 23:09:50,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 178 SyntacticMatches, 107 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36363 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=5415, Invalid=68841, Unknown=0, NotChecked=0, Total=74256 [2021-12-16 23:09:50,896 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 1616 mSDsluCounter, 1817 mSDsCounter, 0 mSdLazyCounter, 5531 mSolverCounterSat, 802 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1616 SdHoareTripleChecker+Valid, 1869 SdHoareTripleChecker+Invalid, 6461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 802 IncrementalHoareTripleChecker+Valid, 5531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-16 23:09:50,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1616 Valid, 1869 Invalid, 6461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [802 Valid, 5531 Invalid, 0 Unknown, 128 Unchecked, 2.8s Time] [2021-12-16 23:09:50,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-12-16 23:09:50,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 443. [2021-12-16 23:09:50,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.0610859728506787) internal successors, (469), 442 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:09:50,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 469 transitions. [2021-12-16 23:09:50,942 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 469 transitions. Word has length 113 [2021-12-16 23:09:50,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:09:50,942 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 469 transitions. [2021-12-16 23:09:50,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 4.386666666666667) internal successors, (329), 75 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:09:50,943 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 469 transitions. [2021-12-16 23:09:50,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-16 23:09:50,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:09:50,944 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 9, 7, 7, 7, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:09:50,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-12-16 23:09:51,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-16 23:09:51,159 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:09:51,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:09:51,160 INFO L85 PathProgramCache]: Analyzing trace with hash 2002554652, now seen corresponding path program 8 times [2021-12-16 23:09:51,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:09:51,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973695879] [2021-12-16 23:09:51,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:09:51,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:09:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:09:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 244 proven. 189 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-16 23:09:51,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:09:51,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973695879] [2021-12-16 23:09:51,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973695879] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:09:51,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447267065] [2021-12-16 23:09:51,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 23:09:51,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:09:51,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:09:51,585 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) [2021-12-16 23:09:51,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-16 23:09:51,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 23:09:51,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:09:51,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-16 23:09:51,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:09:51,837 INFO L388 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 16 treesize of output 12 [2021-12-16 23:09:51,864 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 23:09:51,864 INFO L388 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 23 treesize of output 22 [2021-12-16 23:09:52,449 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:09:52,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:09:52,963 INFO L388 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 17 treesize of output 15 [2021-12-16 23:09:52,964 INFO L388 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 30 treesize of output 26 [2021-12-16 23:09:53,035 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:09:53,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447267065] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:09:53,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:09:53,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25, 25] total 57 [2021-12-16 23:09:53,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819125897] [2021-12-16 23:09:53,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:09:53,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-16 23:09:53,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:09:53,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-16 23:09:53,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=3014, Unknown=0, NotChecked=0, Total=3192 [2021-12-16 23:09:53,037 INFO L87 Difference]: Start difference. First operand 443 states and 469 transitions. Second operand has 57 states, 57 states have (on average 4.719298245614035) internal successors, (269), 57 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:10:06,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:10:06,578 INFO L93 Difference]: Finished difference Result 952 states and 1028 transitions. [2021-12-16 23:10:06,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 252 states. [2021-12-16 23:10:06,579 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 4.719298245614035) internal successors, (269), 57 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-12-16 23:10:06,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:10:06,581 INFO L225 Difference]: With dead ends: 952 [2021-12-16 23:10:06,581 INFO L226 Difference]: Without dead ends: 876 [2021-12-16 23:10:06,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 187 SyntacticMatches, 9 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33767 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=5776, Invalid=85730, Unknown=0, NotChecked=0, Total=91506 [2021-12-16 23:10:06,584 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 2134 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 6189 mSolverCounterSat, 1306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2134 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 7495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1306 IncrementalHoareTripleChecker+Valid, 6189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-16 23:10:06,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2134 Valid, 1262 Invalid, 7495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1306 Valid, 6189 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-16 23:10:06,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-12-16 23:10:06,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 449. [2021-12-16 23:10:06,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.0535714285714286) internal successors, (472), 448 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:10:06,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 472 transitions. [2021-12-16 23:10:06,632 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 472 transitions. Word has length 113 [2021-12-16 23:10:06,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:10:06,632 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 472 transitions. [2021-12-16 23:10:06,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 4.719298245614035) internal successors, (269), 57 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:10:06,633 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 472 transitions. [2021-12-16 23:10:06,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-16 23:10:06,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:10:06,633 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 9, 7, 7, 7, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:10:06,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-12-16 23:10:06,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:10:06,834 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:10:06,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:10:06,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1102360645, now seen corresponding path program 8 times [2021-12-16 23:10:06,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:10:06,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754169846] [2021-12-16 23:10:06,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:10:06,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:10:06,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:10:07,198 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 0 proven. 611 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:10:07,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:10:07,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754169846] [2021-12-16 23:10:07,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754169846] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:10:07,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936532402] [2021-12-16 23:10:07,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 23:10:07,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:10:07,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:10:07,208 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) [2021-12-16 23:10:07,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-16 23:10:07,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 23:10:07,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:10:07,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-16 23:10:07,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:10:07,411 INFO L388 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 16 treesize of output 12 [2021-12-16 23:10:08,098 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-16 23:10:08,099 INFO L388 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 42 treesize of output 20 [2021-12-16 23:10:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 0 proven. 611 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:10:08,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:10:08,360 INFO L388 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 17 treesize of output 15 [2021-12-16 23:10:08,373 INFO L388 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 30 treesize of output 26 [2021-12-16 23:10:08,461 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 0 proven. 611 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:10:08,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936532402] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:10:08,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:10:08,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 41 [2021-12-16 23:10:08,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683121969] [2021-12-16 23:10:08,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:10:08,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-16 23:10:08,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:10:08,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-16 23:10:08,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-12-16 23:10:08,463 INFO L87 Difference]: Start difference. First operand 449 states and 472 transitions. Second operand has 41 states, 41 states have (on average 5.0) internal successors, (205), 41 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:10:20,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:10:20,375 INFO L93 Difference]: Finished difference Result 1215 states and 1295 transitions. [2021-12-16 23:10:20,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 422 states. [2021-12-16 23:10:20,375 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.0) internal successors, (205), 41 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-12-16 23:10:20,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:10:20,378 INFO L225 Difference]: With dead ends: 1215 [2021-12-16 23:10:20,378 INFO L226 Difference]: Without dead ends: 1213 [2021-12-16 23:10:20,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 217 SyntacticMatches, 7 SemanticMatches, 435 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83697 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=7012, Invalid=183520, Unknown=0, NotChecked=0, Total=190532 [2021-12-16 23:10:20,387 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 1596 mSDsluCounter, 1804 mSDsCounter, 0 mSdLazyCounter, 7619 mSolverCounterSat, 882 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1596 SdHoareTripleChecker+Valid, 1892 SdHoareTripleChecker+Invalid, 8501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 882 IncrementalHoareTripleChecker+Valid, 7619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-16 23:10:20,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1596 Valid, 1892 Invalid, 8501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [882 Valid, 7619 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-16 23:10:20,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-12-16 23:10:20,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 461. [2021-12-16 23:10:20,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.0543478260869565) internal successors, (485), 460 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:10:20,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 485 transitions. [2021-12-16 23:10:20,431 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 485 transitions. Word has length 119 [2021-12-16 23:10:20,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:10:20,431 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 485 transitions. [2021-12-16 23:10:20,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.0) internal successors, (205), 41 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:10:20,432 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 485 transitions. [2021-12-16 23:10:20,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-16 23:10:20,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:10:20,433 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:10:20,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-12-16 23:10:20,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:10:20,657 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:10:20,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:10:20,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1467666386, now seen corresponding path program 19 times [2021-12-16 23:10:20,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:10:20,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999076805] [2021-12-16 23:10:20,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:10:20,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:10:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:10:21,291 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 523 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:10:21,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:10:21,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999076805] [2021-12-16 23:10:21,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999076805] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:10:21,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756214350] [2021-12-16 23:10:21,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 23:10:21,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:10:21,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:10:21,293 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) [2021-12-16 23:10:21,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-16 23:10:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:10:21,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-16 23:10:21,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:10:22,916 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 602 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:10:22,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:10:23,656 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 602 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:10:23,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756214350] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:10:23,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:10:23,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 27] total 79 [2021-12-16 23:10:23,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303127658] [2021-12-16 23:10:23,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:10:23,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-16 23:10:23,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:10:23,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-16 23:10:23,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1376, Invalid=4786, Unknown=0, NotChecked=0, Total=6162 [2021-12-16 23:10:23,660 INFO L87 Difference]: Start difference. First operand 461 states and 485 transitions. Second operand has 79 states, 79 states have (on average 4.594936708860759) internal successors, (363), 79 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:10:24,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:10:24,298 INFO L93 Difference]: Finished difference Result 676 states and 706 transitions. [2021-12-16 23:10:24,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-16 23:10:24,299 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 4.594936708860759) internal successors, (363), 79 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-12-16 23:10:24,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:10:24,300 INFO L225 Difference]: With dead ends: 676 [2021-12-16 23:10:24,300 INFO L226 Difference]: Without dead ends: 424 [2021-12-16 23:10:24,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3414 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1868, Invalid=6322, Unknown=0, NotChecked=0, Total=8190 [2021-12-16 23:10:24,301 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 589 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 23:10:24,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 600 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 23:10:24,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-12-16 23:10:24,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 418. [2021-12-16 23:10:24,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.0503597122302157) internal successors, (438), 417 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:10:24,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 438 transitions. [2021-12-16 23:10:24,332 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 438 transitions. Word has length 125 [2021-12-16 23:10:24,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:10:24,334 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 438 transitions. [2021-12-16 23:10:24,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 4.594936708860759) internal successors, (363), 79 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:10:24,334 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 438 transitions. [2021-12-16 23:10:24,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-16 23:10:24,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:10:24,335 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:10:24,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-16 23:10:24,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:10:24,536 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:10:24,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:10:24,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1635122613, now seen corresponding path program 20 times [2021-12-16 23:10:24,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:10:24,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52612432] [2021-12-16 23:10:24,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:10:24,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:10:24,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:10:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 28 proven. 694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:10:25,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:10:25,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52612432] [2021-12-16 23:10:25,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52612432] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:10:25,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490788346] [2021-12-16 23:10:25,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 23:10:25,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:10:25,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:10:25,039 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) [2021-12-16 23:10:25,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-16 23:10:25,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 23:10:25,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:10:25,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-16 23:10:25,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:10:25,589 INFO L388 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 16 treesize of output 12 [2021-12-16 23:10:25,630 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 23:10:25,630 INFO L388 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 23 treesize of output 22 [2021-12-16 23:10:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 28 proven. 694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:10:26,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:10:27,807 INFO L388 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 35 treesize of output 31 [2021-12-16 23:10:27,809 INFO L388 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 67 treesize of output 59 [2021-12-16 23:10:28,642 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:10:28,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490788346] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:10:28,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:10:28,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 31] total 86 [2021-12-16 23:10:28,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838926108] [2021-12-16 23:10:28,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:10:28,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-16 23:10:28,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:10:28,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-16 23:10:28,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=6970, Unknown=0, NotChecked=0, Total=7310 [2021-12-16 23:10:28,644 INFO L87 Difference]: Start difference. First operand 418 states and 438 transitions. Second operand has 86 states, 86 states have (on average 4.406976744186046) internal successors, (379), 86 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:10:54,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:10:54,768 INFO L93 Difference]: Finished difference Result 1081 states and 1142 transitions. [2021-12-16 23:10:54,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 315 states. [2021-12-16 23:10:54,769 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 4.406976744186046) internal successors, (379), 86 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-12-16 23:10:54,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:10:54,771 INFO L225 Difference]: With dead ends: 1081 [2021-12-16 23:10:54,771 INFO L226 Difference]: Without dead ends: 1071 [2021-12-16 23:10:54,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 394 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56009 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=9896, Invalid=146524, Unknown=0, NotChecked=0, Total=156420 [2021-12-16 23:10:54,781 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 1597 mSDsluCounter, 1580 mSDsCounter, 0 mSdLazyCounter, 8098 mSolverCounterSat, 1405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1597 SdHoareTripleChecker+Valid, 1622 SdHoareTripleChecker+Invalid, 9503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1405 IncrementalHoareTripleChecker+Valid, 8098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-16 23:10:54,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1597 Valid, 1622 Invalid, 9503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1405 Valid, 8098 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-16 23:10:54,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-12-16 23:10:54,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 430. [2021-12-16 23:10:54,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 1.0512820512820513) internal successors, (451), 429 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:10:54,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 451 transitions. [2021-12-16 23:10:54,835 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 451 transitions. Word has length 129 [2021-12-16 23:10:54,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:10:54,835 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 451 transitions. [2021-12-16 23:10:54,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 4.406976744186046) internal successors, (379), 86 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:10:54,836 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 451 transitions. [2021-12-16 23:10:54,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-16 23:10:54,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:10:54,837 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 10, 8, 8, 8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:10:54,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-12-16 23:10:55,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-16 23:10:55,063 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:10:55,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:10:55,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1398802183, now seen corresponding path program 9 times [2021-12-16 23:10:55,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:10:55,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968643667] [2021-12-16 23:10:55,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:10:55,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:10:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:10:55,525 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 292 proven. 140 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2021-12-16 23:10:55,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:10:55,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968643667] [2021-12-16 23:10:55,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968643667] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:10:55,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746962635] [2021-12-16 23:10:55,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 23:10:55,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:10:55,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:10:55,528 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) [2021-12-16 23:10:55,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-16 23:10:56,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-16 23:10:56,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:10:56,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-16 23:10:56,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:10:56,334 INFO L388 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 16 treesize of output 12 [2021-12-16 23:10:56,363 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 23:10:56,363 INFO L388 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 23 treesize of output 22 [2021-12-16 23:10:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:10:57,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:10:57,725 INFO L388 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 17 treesize of output 15 [2021-12-16 23:10:57,726 INFO L388 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 30 treesize of output 26 [2021-12-16 23:10:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:10:57,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746962635] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:10:57,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:10:57,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 28, 28] total 61 [2021-12-16 23:10:57,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903408132] [2021-12-16 23:10:57,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:10:57,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-16 23:10:57,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:10:57,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-16 23:10:57,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=3462, Unknown=0, NotChecked=0, Total=3660 [2021-12-16 23:10:57,789 INFO L87 Difference]: Start difference. First operand 430 states and 451 transitions. Second operand has 61 states, 61 states have (on average 4.754098360655738) internal successors, (290), 61 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:11:15,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:11:15,143 INFO L93 Difference]: Finished difference Result 1157 states and 1238 transitions. [2021-12-16 23:11:15,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 299 states. [2021-12-16 23:11:15,143 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 4.754098360655738) internal successors, (290), 61 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-12-16 23:11:15,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:11:15,145 INFO L225 Difference]: With dead ends: 1157 [2021-12-16 23:11:15,145 INFO L226 Difference]: Without dead ends: 1057 [2021-12-16 23:11:15,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 219 SyntacticMatches, 8 SemanticMatches, 352 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47685 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=7181, Invalid=117781, Unknown=0, NotChecked=0, Total=124962 [2021-12-16 23:11:15,150 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 2510 mSDsluCounter, 1584 mSDsCounter, 0 mSdLazyCounter, 8024 mSolverCounterSat, 1477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2510 SdHoareTripleChecker+Valid, 1642 SdHoareTripleChecker+Invalid, 9501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1477 IncrementalHoareTripleChecker+Valid, 8024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-16 23:11:15,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2510 Valid, 1642 Invalid, 9501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1477 Valid, 8024 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-12-16 23:11:15,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-12-16 23:11:15,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 535. [2021-12-16 23:11:15,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 1.0524344569288389) internal successors, (562), 534 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:11:15,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 562 transitions. [2021-12-16 23:11:15,197 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 562 transitions. Word has length 129 [2021-12-16 23:11:15,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:11:15,197 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 562 transitions. [2021-12-16 23:11:15,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 4.754098360655738) internal successors, (290), 61 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:11:15,197 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 562 transitions. [2021-12-16 23:11:15,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-16 23:11:15,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:11:15,199 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:11:15,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-12-16 23:11:15,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-16 23:11:15,406 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:11:15,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:11:15,406 INFO L85 PathProgramCache]: Analyzing trace with hash -86057890, now seen corresponding path program 21 times [2021-12-16 23:11:15,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:11:15,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868256048] [2021-12-16 23:11:15,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:11:15,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:11:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:11:16,007 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 30 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:11:16,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:11:16,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868256048] [2021-12-16 23:11:16,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868256048] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:11:16,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159872643] [2021-12-16 23:11:16,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 23:11:16,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:11:16,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:11:16,012 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) [2021-12-16 23:11:16,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-16 23:11:16,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-12-16 23:11:16,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:11:16,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-16 23:11:16,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:11:17,216 INFO L388 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 [2021-12-16 23:11:18,318 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 30 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:11:18,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:11:19,043 INFO L388 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 17 treesize of output 15 [2021-12-16 23:11:19,044 INFO L388 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 30 treesize of output 26 [2021-12-16 23:11:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 30 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:11:19,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159872643] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:11:19,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:11:19,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 28] total 78 [2021-12-16 23:11:19,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536466969] [2021-12-16 23:11:19,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:11:19,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-12-16 23:11:19,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:11:19,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-12-16 23:11:19,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=5725, Unknown=0, NotChecked=0, Total=6006 [2021-12-16 23:11:19,363 INFO L87 Difference]: Start difference. First operand 535 states and 562 transitions. Second operand has 78 states, 78 states have (on average 4.884615384615385) internal successors, (381), 78 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:11:36,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:11:36,111 INFO L93 Difference]: Finished difference Result 1179 states and 1231 transitions. [2021-12-16 23:11:36,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 266 states. [2021-12-16 23:11:36,112 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 4.884615384615385) internal successors, (381), 78 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-12-16 23:11:36,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:11:36,116 INFO L225 Difference]: With dead ends: 1179 [2021-12-16 23:11:36,116 INFO L226 Difference]: Without dead ends: 1169 [2021-12-16 23:11:36,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38055 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=5694, Invalid=104198, Unknown=0, NotChecked=0, Total=109892 [2021-12-16 23:11:36,124 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 1465 mSDsluCounter, 2240 mSDsCounter, 0 mSdLazyCounter, 6941 mSolverCounterSat, 1058 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1465 SdHoareTripleChecker+Valid, 2300 SdHoareTripleChecker+Invalid, 7999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1058 IncrementalHoareTripleChecker+Valid, 6941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-16 23:11:36,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1465 Valid, 2300 Invalid, 7999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1058 Valid, 6941 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-16 23:11:36,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-12-16 23:11:36,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 541. [2021-12-16 23:11:36,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 1.0518518518518518) internal successors, (568), 540 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:11:36,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 568 transitions. [2021-12-16 23:11:36,193 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 568 transitions. Word has length 135 [2021-12-16 23:11:36,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:11:36,193 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 568 transitions. [2021-12-16 23:11:36,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 4.884615384615385) internal successors, (381), 78 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:11:36,194 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 568 transitions. [2021-12-16 23:11:36,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-16 23:11:36,195 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:11:36,195 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 11, 8, 8, 8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:11:36,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-12-16 23:11:36,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-16 23:11:36,403 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:11:36,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:11:36,404 INFO L85 PathProgramCache]: Analyzing trace with hash -846213274, now seen corresponding path program 9 times [2021-12-16 23:11:36,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:11:36,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885545081] [2021-12-16 23:11:36,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:11:36,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:11:36,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:11:36,892 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 0 proven. 810 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:11:36,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:11:36,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885545081] [2021-12-16 23:11:36,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885545081] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:11:36,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984518907] [2021-12-16 23:11:36,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 23:11:36,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:11:36,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:11:36,894 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) [2021-12-16 23:11:36,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-16 23:11:37,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-12-16 23:11:37,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:11:37,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-16 23:11:37,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:11:38,030 INFO L388 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 16 treesize of output 12 [2021-12-16 23:11:38,113 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:11:38,114 INFO L388 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 26 treesize of output 25 [2021-12-16 23:11:38,130 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 23:11:38,130 INFO L388 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 26 treesize of output 25 [2021-12-16 23:11:39,070 INFO L388 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 [2021-12-16 23:11:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 186 proven. 614 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 23:11:39,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... Killed by 15