./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4b6873ae1a0d665798beb3dd9c0c48e89806da7dd46f1d2066800a52e0a2aa51 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 19:49:59,732 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 19:49:59,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 19:49:59,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 19:49:59,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 19:49:59,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 19:49:59,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 19:49:59,794 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 19:49:59,796 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 19:49:59,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 19:49:59,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 19:49:59,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 19:49:59,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 19:49:59,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 19:49:59,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 19:49:59,805 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 19:49:59,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 19:49:59,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 19:49:59,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 19:49:59,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 19:49:59,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 19:49:59,810 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 19:49:59,811 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 19:49:59,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 19:49:59,813 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 19:49:59,813 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 19:49:59,814 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 19:49:59,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 19:49:59,814 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 19:49:59,815 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 19:49:59,815 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 19:49:59,816 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 19:49:59,816 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 19:49:59,817 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 19:49:59,817 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 19:49:59,818 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 19:49:59,818 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 19:49:59,818 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 19:49:59,819 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 19:49:59,819 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 19:49:59,820 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 19:49:59,822 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 19:49:59,841 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 19:49:59,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 19:49:59,847 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 19:49:59,847 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 19:49:59,848 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 19:49:59,848 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 19:49:59,849 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 19:49:59,849 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 19:49:59,849 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 19:49:59,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 19:49:59,850 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 19:49:59,850 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 19:49:59,850 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 19:49:59,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 19:49:59,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 19:49:59,850 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 19:49:59,851 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 19:49:59,851 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 19:49:59,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 19:49:59,851 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 19:49:59,851 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 19:49:59,851 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 19:49:59,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 19:49:59,852 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 19:49:59,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 19:49:59,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:49:59,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 19:49:59,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 19:49:59,852 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 19:49:59,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 19:49:59,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 19:49:59,853 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b6873ae1a0d665798beb3dd9c0c48e89806da7dd46f1d2066800a52e0a2aa51 [2021-12-18 19:50:00,050 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 19:50:00,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 19:50:00,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 19:50:00,066 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 19:50:00,066 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 19:50:00,067 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i [2021-12-18 19:50:00,117 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38a3c0065/40d8e43e9759445396589a4ab0f1ffdd/FLAGf335dd0dc [2021-12-18 19:50:00,522 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 19:50:00,522 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i [2021-12-18 19:50:00,531 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38a3c0065/40d8e43e9759445396589a4ab0f1ffdd/FLAGf335dd0dc [2021-12-18 19:50:00,540 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38a3c0065/40d8e43e9759445396589a4ab0f1ffdd [2021-12-18 19:50:00,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 19:50:00,543 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 19:50:00,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 19:50:00,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 19:50:00,553 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 19:50:00,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:50:00" (1/1) ... [2021-12-18 19:50:00,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1705ae88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:50:00, skipping insertion in model container [2021-12-18 19:50:00,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:50:00" (1/1) ... [2021-12-18 19:50:00,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 19:50:00,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 19:50:00,776 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:50:00,783 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 19:50:00,823 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:50:00,842 INFO L208 MainTranslator]: Completed translation [2021-12-18 19:50:00,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:50:00 WrapperNode [2021-12-18 19:50:00,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 19:50:00,844 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 19:50:00,844 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 19:50:00,844 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 19:50:00,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:50:00" (1/1) ... [2021-12-18 19:50:00,857 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:50:00" (1/1) ... [2021-12-18 19:50:00,871 INFO L137 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2021-12-18 19:50:00,872 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 19:50:00,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 19:50:00,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 19:50:00,872 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 19:50:00,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:50:00" (1/1) ... [2021-12-18 19:50:00,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:50:00" (1/1) ... [2021-12-18 19:50:00,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:50:00" (1/1) ... [2021-12-18 19:50:00,883 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:50:00" (1/1) ... [2021-12-18 19:50:00,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:50:00" (1/1) ... [2021-12-18 19:50:00,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:50:00" (1/1) ... [2021-12-18 19:50:00,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:50:00" (1/1) ... [2021-12-18 19:50:00,918 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 19:50:00,919 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 19:50:00,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 19:50:00,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 19:50:00,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:50:00" (1/1) ... [2021-12-18 19:50:00,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:50:00,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:00,955 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) [2021-12-18 19:50:00,960 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 [2021-12-18 19:50:00,993 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 19:50:00,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 19:50:00,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 19:50:00,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 19:50:00,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 19:50:00,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 19:50:01,167 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 19:50:01,168 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 19:50:01,324 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 19:50:01,329 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 19:50:01,329 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-18 19:50:01,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:50:01 BoogieIcfgContainer [2021-12-18 19:50:01,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 19:50:01,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 19:50:01,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 19:50:01,334 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 19:50:01,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:50:00" (1/3) ... [2021-12-18 19:50:01,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f8d133 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:50:01, skipping insertion in model container [2021-12-18 19:50:01,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:50:00" (2/3) ... [2021-12-18 19:50:01,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f8d133 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:50:01, skipping insertion in model container [2021-12-18 19:50:01,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:50:01" (3/3) ... [2021-12-18 19:50:01,336 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcpy-alloca-2.i [2021-12-18 19:50:01,340 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 19:50:01,341 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-12-18 19:50:01,378 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 19:50:01,384 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-12-18 19:50:01,385 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-12-18 19:50:01,396 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 28 states have internal predecessors, (35), 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) [2021-12-18 19:50:01,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-18 19:50:01,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:01,408 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-18 19:50:01,408 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:01,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:01,413 INFO L85 PathProgramCache]: Analyzing trace with hash 889510840, now seen corresponding path program 1 times [2021-12-18 19:50:01,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:01,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058456528] [2021-12-18 19:50:01,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:01,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:01,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:01,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:01,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058456528] [2021-12-18 19:50:01,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058456528] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:50:01,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:50:01,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:50:01,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100043736] [2021-12-18 19:50:01,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:50:01,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:50:01,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:01,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:50:01,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:50:01,590 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 28 states have internal predecessors, (35), 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 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-12-18 19:50:01,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:01,636 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-12-18 19:50:01,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:50:01,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2021-12-18 19:50:01,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:01,644 INFO L225 Difference]: With dead ends: 34 [2021-12-18 19:50:01,644 INFO L226 Difference]: Without dead ends: 30 [2021-12-18 19:50:01,646 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 [2021-12-18 19:50:01,652 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 56 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:01,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 35 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:50:01,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-18 19:50:01,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-12-18 19:50:01,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 27 states have internal predecessors, (32), 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) [2021-12-18 19:50:01,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-18 19:50:01,679 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 6 [2021-12-18 19:50:01,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:01,679 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-18 19:50:01,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-12-18 19:50:01,680 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-18 19:50:01,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-18 19:50:01,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:01,681 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-18 19:50:01,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 19:50:01,681 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:01,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:01,682 INFO L85 PathProgramCache]: Analyzing trace with hash 889512762, now seen corresponding path program 1 times [2021-12-18 19:50:01,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:01,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690651254] [2021-12-18 19:50:01,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:01,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:01,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:01,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:01,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:01,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690651254] [2021-12-18 19:50:01,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690651254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:50:01,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:50:01,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:50:01,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470771705] [2021-12-18 19:50:01,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:50:01,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:50:01,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:01,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:50:01,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:50:01,727 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-12-18 19:50:01,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:01,748 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-12-18 19:50:01,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:50:01,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-12-18 19:50:01,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:01,751 INFO L225 Difference]: With dead ends: 29 [2021-12-18 19:50:01,751 INFO L226 Difference]: Without dead ends: 28 [2021-12-18 19:50:01,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:50:01,755 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:01,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 43 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:50:01,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-18 19:50:01,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-12-18 19:50:01,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 26 states have internal predecessors, (30), 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) [2021-12-18 19:50:01,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-12-18 19:50:01,761 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 6 [2021-12-18 19:50:01,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:01,762 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-12-18 19:50:01,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-12-18 19:50:01,762 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-12-18 19:50:01,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:50:01,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:01,763 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:01,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 19:50:01,764 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:01,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:01,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033015, now seen corresponding path program 1 times [2021-12-18 19:50:01,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:01,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123939446] [2021-12-18 19:50:01,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:01,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:01,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:01,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:01,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:01,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123939446] [2021-12-18 19:50:01,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123939446] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:50:01,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:50:01,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:50:01,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374398948] [2021-12-18 19:50:01,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:50:01,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:50:01,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:01,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:50:01,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:50:01,829 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-12-18 19:50:01,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:01,849 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-12-18 19:50:01,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:50:01,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2021-12-18 19:50:01,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:01,850 INFO L225 Difference]: With dead ends: 25 [2021-12-18 19:50:01,850 INFO L226 Difference]: Without dead ends: 25 [2021-12-18 19:50:01,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:50:01,855 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 22 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 [2021-12-18 19:50:01,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 22 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:50:01,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-18 19:50:01,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-12-18 19:50:01,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 24 states have internal predecessors, (28), 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) [2021-12-18 19:50:01,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-12-18 19:50:01,861 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 7 [2021-12-18 19:50:01,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:01,861 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-12-18 19:50:01,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-12-18 19:50:01,862 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-12-18 19:50:01,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:50:01,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:01,863 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:01,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-18 19:50:01,863 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:01,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:01,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033016, now seen corresponding path program 1 times [2021-12-18 19:50:01,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:01,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688646969] [2021-12-18 19:50:01,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:01,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:01,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:01,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:01,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688646969] [2021-12-18 19:50:01,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688646969] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:50:01,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:50:01,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:50:01,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110164285] [2021-12-18 19:50:01,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:50:01,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:50:01,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:01,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:50:01,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:50:01,936 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-12-18 19:50:01,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:01,961 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-12-18 19:50:01,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:50:01,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-12-18 19:50:01,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:01,963 INFO L225 Difference]: With dead ends: 24 [2021-12-18 19:50:01,963 INFO L226 Difference]: Without dead ends: 24 [2021-12-18 19:50:01,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:50:01,968 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 19 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 [2021-12-18 19:50:01,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:50:01,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-18 19:50:01,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-18 19:50:01,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.5) internal successors, (27), 23 states have internal predecessors, (27), 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) [2021-12-18 19:50:01,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-18 19:50:01,972 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 7 [2021-12-18 19:50:01,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:01,972 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-18 19:50:01,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-12-18 19:50:01,973 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-18 19:50:01,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:50:01,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:01,973 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:01,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-18 19:50:01,973 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:01,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:01,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033069, now seen corresponding path program 1 times [2021-12-18 19:50:01,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:01,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017040856] [2021-12-18 19:50:01,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:01,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:02,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:02,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:02,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017040856] [2021-12-18 19:50:02,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017040856] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:50:02,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:50:02,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:50:02,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255040701] [2021-12-18 19:50:02,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:50:02,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:50:02,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:02,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:50:02,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:50:02,011 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-12-18 19:50:02,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:02,022 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-12-18 19:50:02,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:50:02,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-12-18 19:50:02,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:02,023 INFO L225 Difference]: With dead ends: 40 [2021-12-18 19:50:02,023 INFO L226 Difference]: Without dead ends: 40 [2021-12-18 19:50:02,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:50:02,024 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 31 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 44 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 [2021-12-18 19:50:02,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 44 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:50:02,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-18 19:50:02,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2021-12-18 19:50:02,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.45) internal successors, (29), 25 states have internal predecessors, (29), 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) [2021-12-18 19:50:02,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-12-18 19:50:02,026 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 7 [2021-12-18 19:50:02,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:02,026 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-12-18 19:50:02,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-12-18 19:50:02,027 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-12-18 19:50:02,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:50:02,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:02,027 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:02,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-18 19:50:02,027 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:02,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:02,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1805092651, now seen corresponding path program 1 times [2021-12-18 19:50:02,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:02,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223365541] [2021-12-18 19:50:02,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:02,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:02,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:02,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:02,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:02,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223365541] [2021-12-18 19:50:02,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223365541] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:50:02,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:50:02,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:50:02,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302283797] [2021-12-18 19:50:02,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:50:02,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:50:02,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:02,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:50:02,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:50:02,097 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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) [2021-12-18 19:50:02,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:02,137 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-12-18 19:50:02,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:50:02,138 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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 7 [2021-12-18 19:50:02,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:02,139 INFO L225 Difference]: With dead ends: 44 [2021-12-18 19:50:02,140 INFO L226 Difference]: Without dead ends: 44 [2021-12-18 19:50:02,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:50:02,141 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:02,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 45 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:50:02,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-18 19:50:02,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2021-12-18 19:50:02,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 27 states have internal predecessors, (32), 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) [2021-12-18 19:50:02,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-18 19:50:02,144 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 7 [2021-12-18 19:50:02,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:02,144 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-18 19:50:02,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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) [2021-12-18 19:50:02,144 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-18 19:50:02,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 19:50:02,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:02,145 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:02,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-18 19:50:02,145 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:02,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:02,146 INFO L85 PathProgramCache]: Analyzing trace with hash -530059845, now seen corresponding path program 1 times [2021-12-18 19:50:02,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:02,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854351154] [2021-12-18 19:50:02,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:02,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:02,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:02,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:02,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854351154] [2021-12-18 19:50:02,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854351154] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:50:02,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:50:02,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:50:02,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45891052] [2021-12-18 19:50:02,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:50:02,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:50:02,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:02,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:50:02,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:50:02,196 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-12-18 19:50:02,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:02,220 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-12-18 19:50:02,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:50:02,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2021-12-18 19:50:02,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:02,220 INFO L225 Difference]: With dead ends: 27 [2021-12-18 19:50:02,221 INFO L226 Difference]: Without dead ends: 27 [2021-12-18 19:50:02,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:50:02,222 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:02,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 28 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:50:02,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-18 19:50:02,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-18 19:50:02,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 26 states have internal predecessors, (31), 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) [2021-12-18 19:50:02,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-12-18 19:50:02,229 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 9 [2021-12-18 19:50:02,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:02,229 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-12-18 19:50:02,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-12-18 19:50:02,230 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-12-18 19:50:02,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 19:50:02,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:02,230 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:02,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-18 19:50:02,230 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:02,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:02,231 INFO L85 PathProgramCache]: Analyzing trace with hash -530059844, now seen corresponding path program 1 times [2021-12-18 19:50:02,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:02,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036042396] [2021-12-18 19:50:02,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:02,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:02,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:02,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036042396] [2021-12-18 19:50:02,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036042396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:50:02,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:50:02,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 19:50:02,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407377443] [2021-12-18 19:50:02,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:50:02,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 19:50:02,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:02,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 19:50:02,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:50:02,281 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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) [2021-12-18 19:50:02,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:02,316 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-12-18 19:50:02,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:50:02,317 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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 9 [2021-12-18 19:50:02,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:02,317 INFO L225 Difference]: With dead ends: 37 [2021-12-18 19:50:02,317 INFO L226 Difference]: Without dead ends: 37 [2021-12-18 19:50:02,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-18 19:50:02,318 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 65 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:02,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 39 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:50:02,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-18 19:50:02,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2021-12-18 19:50:02,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.391304347826087) internal successors, (32), 27 states have internal predecessors, (32), 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) [2021-12-18 19:50:02,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-18 19:50:02,320 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 9 [2021-12-18 19:50:02,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:02,321 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-18 19:50:02,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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) [2021-12-18 19:50:02,321 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-18 19:50:02,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-18 19:50:02,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:02,321 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:02,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-18 19:50:02,322 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:02,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:02,322 INFO L85 PathProgramCache]: Analyzing trace with hash 748014006, now seen corresponding path program 1 times [2021-12-18 19:50:02,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:02,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034068902] [2021-12-18 19:50:02,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:02,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:02,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:02,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:02,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034068902] [2021-12-18 19:50:02,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034068902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:50:02,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:50:02,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:50:02,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006046950] [2021-12-18 19:50:02,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:50:02,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:50:02,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:02,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:50:02,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:50:02,366 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-12-18 19:50:02,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:02,395 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-12-18 19:50:02,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:50:02,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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 10 [2021-12-18 19:50:02,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:02,396 INFO L225 Difference]: With dead ends: 27 [2021-12-18 19:50:02,396 INFO L226 Difference]: Without dead ends: 27 [2021-12-18 19:50:02,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:50:02,397 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:02,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 28 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:50:02,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-18 19:50:02,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-18 19:50:02,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 26 states have internal predecessors, (31), 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) [2021-12-18 19:50:02,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-12-18 19:50:02,399 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 10 [2021-12-18 19:50:02,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:02,399 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-12-18 19:50:02,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-12-18 19:50:02,399 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-12-18 19:50:02,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-18 19:50:02,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:02,400 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:02,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-18 19:50:02,400 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:02,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:02,400 INFO L85 PathProgramCache]: Analyzing trace with hash 748014007, now seen corresponding path program 1 times [2021-12-18 19:50:02,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:02,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190291623] [2021-12-18 19:50:02,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:02,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:02,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:02,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:02,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190291623] [2021-12-18 19:50:02,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190291623] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:50:02,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:50:02,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:50:02,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057405481] [2021-12-18 19:50:02,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:50:02,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:50:02,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:02,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:50:02,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:50:02,437 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-12-18 19:50:02,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:02,467 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-12-18 19:50:02,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:50:02,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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 10 [2021-12-18 19:50:02,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:02,468 INFO L225 Difference]: With dead ends: 34 [2021-12-18 19:50:02,469 INFO L226 Difference]: Without dead ends: 34 [2021-12-18 19:50:02,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:50:02,469 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:02,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 36 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:50:02,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-18 19:50:02,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2021-12-18 19:50:02,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 27 states have internal predecessors, (32), 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) [2021-12-18 19:50:02,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-18 19:50:02,471 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 10 [2021-12-18 19:50:02,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:02,472 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-18 19:50:02,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-12-18 19:50:02,472 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-18 19:50:02,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 19:50:02,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:02,472 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:02,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-18 19:50:02,473 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:02,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:02,473 INFO L85 PathProgramCache]: Analyzing trace with hash 952918382, now seen corresponding path program 1 times [2021-12-18 19:50:02,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:02,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406757332] [2021-12-18 19:50:02,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:02,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:50:02,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:02,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406757332] [2021-12-18 19:50:02,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406757332] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:50:02,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:50:02,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:50:02,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405506214] [2021-12-18 19:50:02,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:50:02,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:50:02,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:02,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:50:02,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:50:02,498 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-12-18 19:50:02,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:02,515 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2021-12-18 19:50:02,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:50:02,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2021-12-18 19:50:02,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:02,516 INFO L225 Difference]: With dead ends: 47 [2021-12-18 19:50:02,516 INFO L226 Difference]: Without dead ends: 47 [2021-12-18 19:50:02,516 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 [2021-12-18 19:50:02,517 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 28 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:02,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 58 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:50:02,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-18 19:50:02,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 29. [2021-12-18 19:50:02,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.36) 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) [2021-12-18 19:50:02,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-12-18 19:50:02,519 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 11 [2021-12-18 19:50:02,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:02,519 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-12-18 19:50:02,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-12-18 19:50:02,520 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-12-18 19:50:02,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 19:50:02,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:02,520 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:02,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-18 19:50:02,520 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:02,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:02,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1632976752, now seen corresponding path program 1 times [2021-12-18 19:50:02,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:02,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303816735] [2021-12-18 19:50:02,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:02,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:02,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:02,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303816735] [2021-12-18 19:50:02,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303816735] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:02,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49201655] [2021-12-18 19:50:02,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:02,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:02,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:02,566 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) [2021-12-18 19:50:02,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 19:50:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:02,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 19:50:02,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:02,672 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:50:02,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:50:02,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:02,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:02,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49201655] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:02,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:02,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-18 19:50:02,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969627800] [2021-12-18 19:50:02,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:02,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 19:50:02,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:02,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 19:50:02,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:50:02,849 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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) [2021-12-18 19:50:02,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:02,963 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-12-18 19:50:02,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 19:50:02,964 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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) Word has length 11 [2021-12-18 19:50:02,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:02,964 INFO L225 Difference]: With dead ends: 59 [2021-12-18 19:50:02,964 INFO L226 Difference]: Without dead ends: 59 [2021-12-18 19:50:02,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-18 19:50:02,965 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 84 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:02,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 88 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:50:02,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-18 19:50:02,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 26. [2021-12-18 19:50:02,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 25 states have internal predecessors, (30), 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) [2021-12-18 19:50:02,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-12-18 19:50:02,967 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 11 [2021-12-18 19:50:02,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:02,967 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-12-18 19:50:02,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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) [2021-12-18 19:50:02,968 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-12-18 19:50:02,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 19:50:02,968 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:02,968 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:03,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-18 19:50:03,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-18 19:50:03,192 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:03,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:03,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1794944983, now seen corresponding path program 1 times [2021-12-18 19:50:03,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:03,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502588568] [2021-12-18 19:50:03,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:03,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:03,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:03,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:03,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502588568] [2021-12-18 19:50:03,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502588568] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:50:03,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:50:03,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 19:50:03,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946796412] [2021-12-18 19:50:03,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:50:03,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 19:50:03,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:03,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 19:50:03,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:50:03,252 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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) [2021-12-18 19:50:03,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:03,310 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-12-18 19:50:03,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 19:50:03,310 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 [2021-12-18 19:50:03,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:03,311 INFO L225 Difference]: With dead ends: 37 [2021-12-18 19:50:03,311 INFO L226 Difference]: Without dead ends: 37 [2021-12-18 19:50:03,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:50:03,313 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:03,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 96 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:50:03,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-18 19:50:03,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-12-18 19:50:03,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 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) [2021-12-18 19:50:03,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-12-18 19:50:03,317 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 13 [2021-12-18 19:50:03,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:03,317 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-12-18 19:50:03,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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) [2021-12-18 19:50:03,318 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-12-18 19:50:03,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 19:50:03,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:03,319 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:03,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-18 19:50:03,319 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:03,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:03,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1401917973, now seen corresponding path program 1 times [2021-12-18 19:50:03,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:03,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745568631] [2021-12-18 19:50:03,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:03,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:03,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:03,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:03,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745568631] [2021-12-18 19:50:03,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745568631] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:50:03,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:50:03,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 19:50:03,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373081232] [2021-12-18 19:50:03,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:50:03,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 19:50:03,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:03,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 19:50:03,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-18 19:50:03,402 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 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) [2021-12-18 19:50:03,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:03,473 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-12-18 19:50:03,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 19:50:03,473 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 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 [2021-12-18 19:50:03,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:03,474 INFO L225 Difference]: With dead ends: 49 [2021-12-18 19:50:03,474 INFO L226 Difference]: Without dead ends: 49 [2021-12-18 19:50:03,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-18 19:50:03,474 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:03,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 99 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:50:03,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-18 19:50:03,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2021-12-18 19:50:03,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 28 states have (on average 1.25) internal successors, (35), 30 states have internal predecessors, (35), 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) [2021-12-18 19:50:03,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-12-18 19:50:03,482 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 13 [2021-12-18 19:50:03,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:03,483 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-12-18 19:50:03,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 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) [2021-12-18 19:50:03,483 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-12-18 19:50:03,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 19:50:03,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:03,484 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:03,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-18 19:50:03,484 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:03,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:03,485 INFO L85 PathProgramCache]: Analyzing trace with hash 2102982551, now seen corresponding path program 1 times [2021-12-18 19:50:03,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:03,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628832590] [2021-12-18 19:50:03,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:03,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:03,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:03,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:03,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628832590] [2021-12-18 19:50:03,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628832590] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:50:03,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:50:03,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 19:50:03,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095566186] [2021-12-18 19:50:03,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:50:03,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 19:50:03,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:03,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 19:50:03,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-18 19:50:03,578 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 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) [2021-12-18 19:50:03,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:03,652 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-12-18 19:50:03,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 19:50:03,653 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 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 [2021-12-18 19:50:03,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:03,653 INFO L225 Difference]: With dead ends: 44 [2021-12-18 19:50:03,653 INFO L226 Difference]: Without dead ends: 44 [2021-12-18 19:50:03,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-12-18 19:50:03,654 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 47 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:03,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 82 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:50:03,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-18 19:50:03,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2021-12-18 19:50:03,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 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) [2021-12-18 19:50:03,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-12-18 19:50:03,666 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 13 [2021-12-18 19:50:03,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:03,666 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-12-18 19:50:03,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 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) [2021-12-18 19:50:03,667 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-12-18 19:50:03,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 19:50:03,667 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:03,667 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:03,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-18 19:50:03,667 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:03,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:03,668 INFO L85 PathProgramCache]: Analyzing trace with hash -191335553, now seen corresponding path program 1 times [2021-12-18 19:50:03,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:03,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975536564] [2021-12-18 19:50:03,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:03,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:03,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:03,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975536564] [2021-12-18 19:50:03,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975536564] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:50:03,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:50:03,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:50:03,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162893931] [2021-12-18 19:50:03,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:50:03,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:50:03,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:03,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:50:03,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:50:03,756 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-12-18 19:50:03,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:03,766 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-12-18 19:50:03,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:50:03,766 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2021-12-18 19:50:03,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:03,767 INFO L225 Difference]: With dead ends: 31 [2021-12-18 19:50:03,767 INFO L226 Difference]: Without dead ends: 20 [2021-12-18 19:50:03,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:50:03,768 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:03,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 32 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:50:03,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-18 19:50:03,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-12-18 19:50:03,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 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) [2021-12-18 19:50:03,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-12-18 19:50:03,769 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2021-12-18 19:50:03,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:03,769 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-12-18 19:50:03,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-12-18 19:50:03,770 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-12-18 19:50:03,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 19:50:03,770 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:03,770 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:03,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-18 19:50:03,770 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:03,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:03,771 INFO L85 PathProgramCache]: Analyzing trace with hash 70337178, now seen corresponding path program 1 times [2021-12-18 19:50:03,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:03,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395271889] [2021-12-18 19:50:03,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:03,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:03,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:03,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:03,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395271889] [2021-12-18 19:50:03,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395271889] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:03,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044079902] [2021-12-18 19:50:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:03,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:03,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:03,837 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) [2021-12-18 19:50:03,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 19:50:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:03,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-18 19:50:03,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:03,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:04,043 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 5 treesize of output 3 [2021-12-18 19:50:04,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:04,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044079902] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:04,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:04,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-12-18 19:50:04,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475491269] [2021-12-18 19:50:04,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:04,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-18 19:50:04,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:04,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-18 19:50:04,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-12-18 19:50:04,068 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 17 states, 16 states have (on average 2.25) internal successors, (36), 17 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) [2021-12-18 19:50:04,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:04,162 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-12-18 19:50:04,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 19:50:04,162 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 17 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) Word has length 17 [2021-12-18 19:50:04,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:04,163 INFO L225 Difference]: With dead ends: 30 [2021-12-18 19:50:04,163 INFO L226 Difference]: Without dead ends: 30 [2021-12-18 19:50:04,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-12-18 19:50:04,164 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 87 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:04,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 50 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:50:04,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-18 19:50:04,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2021-12-18 19:50:04,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 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) [2021-12-18 19:50:04,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-12-18 19:50:04,165 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 17 [2021-12-18 19:50:04,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:04,165 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-12-18 19:50:04,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 17 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) [2021-12-18 19:50:04,166 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-12-18 19:50:04,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 19:50:04,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:04,166 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:04,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-18 19:50:04,383 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,SelfDestructingSolverStorable16 [2021-12-18 19:50:04,383 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:04,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:04,383 INFO L85 PathProgramCache]: Analyzing trace with hash -2114514791, now seen corresponding path program 1 times [2021-12-18 19:50:04,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:04,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422668724] [2021-12-18 19:50:04,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:04,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:04,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:04,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422668724] [2021-12-18 19:50:04,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422668724] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:04,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380956289] [2021-12-18 19:50:04,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:04,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:04,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:04,440 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) [2021-12-18 19:50:04,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 19:50:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:04,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-18 19:50:04,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:04,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:50:04,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 19:50:04,513 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 10 treesize of output 8 [2021-12-18 19:50:04,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:04,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:04,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:04,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380956289] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:04,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:04,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2021-12-18 19:50:04,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541154861] [2021-12-18 19:50:04,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:04,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 19:50:04,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:04,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 19:50:04,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-18 19:50:04,778 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 16 states, 15 states have (on average 3.0) internal successors, (45), 16 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) [2021-12-18 19:50:04,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:04,926 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-12-18 19:50:04,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 19:50:04,932 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 16 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 18 [2021-12-18 19:50:04,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:04,932 INFO L225 Difference]: With dead ends: 29 [2021-12-18 19:50:04,932 INFO L226 Difference]: Without dead ends: 29 [2021-12-18 19:50:04,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-12-18 19:50:04,935 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 70 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:04,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 45 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:50:04,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-18 19:50:04,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2021-12-18 19:50:04,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 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) [2021-12-18 19:50:04,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-12-18 19:50:04,938 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2021-12-18 19:50:04,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:04,938 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-12-18 19:50:04,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 16 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) [2021-12-18 19:50:04,938 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-12-18 19:50:04,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-18 19:50:04,939 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:04,939 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:04,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-18 19:50:05,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-18 19:50:05,143 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:05,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:05,143 INFO L85 PathProgramCache]: Analyzing trace with hash 775185845, now seen corresponding path program 2 times [2021-12-18 19:50:05,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:05,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281764191] [2021-12-18 19:50:05,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:05,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:05,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:05,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:05,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281764191] [2021-12-18 19:50:05,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281764191] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:05,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502007602] [2021-12-18 19:50:05,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:50:05,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:05,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:05,324 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) [2021-12-18 19:50:05,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 19:50:05,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:50:05,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:05,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-18 19:50:05,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:05,398 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:50:05,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:50:05,407 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 10 treesize of output 8 [2021-12-18 19:50:05,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:50:05,551 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 16 treesize of output 18 [2021-12-18 19:50:05,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:50:05,616 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 17 treesize of output 17 [2021-12-18 19:50:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:05,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:05,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:50:05,953 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:50:05,972 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:50:05,972 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 37 [2021-12-18 19:50:05,976 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 11 treesize of output 7 [2021-12-18 19:50:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:06,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502007602] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:06,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:06,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 29 [2021-12-18 19:50:06,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178710467] [2021-12-18 19:50:06,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:06,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-18 19:50:06,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:06,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-18 19:50:06,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=709, Unknown=2, NotChecked=0, Total=812 [2021-12-18 19:50:06,135 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 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) [2021-12-18 19:50:06,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:06,408 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-12-18 19:50:06,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 19:50:06,409 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 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 [2021-12-18 19:50:06,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:06,409 INFO L225 Difference]: With dead ends: 44 [2021-12-18 19:50:06,409 INFO L226 Difference]: Without dead ends: 35 [2021-12-18 19:50:06,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=173, Invalid=1157, Unknown=2, NotChecked=0, Total=1332 [2021-12-18 19:50:06,410 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:06,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 94 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 181 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2021-12-18 19:50:06,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-18 19:50:06,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2021-12-18 19:50:06,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 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) [2021-12-18 19:50:06,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-12-18 19:50:06,411 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 21 [2021-12-18 19:50:06,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:06,412 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-12-18 19:50:06,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 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) [2021-12-18 19:50:06,412 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-12-18 19:50:06,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-18 19:50:06,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:06,412 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:06,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 19:50:06,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:06,613 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:06,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:06,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1518290629, now seen corresponding path program 2 times [2021-12-18 19:50:06,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:06,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822787772] [2021-12-18 19:50:06,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:06,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:06,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:06,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822787772] [2021-12-18 19:50:06,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822787772] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:06,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253311269] [2021-12-18 19:50:06,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:50:06,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:06,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:06,687 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) [2021-12-18 19:50:06,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 19:50:06,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:50:06,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:06,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-18 19:50:06,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:06,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:50:06,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 19:50:06,760 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 10 treesize of output 8 [2021-12-18 19:50:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:06,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:07,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253311269] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:07,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:07,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2021-12-18 19:50:07,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225105816] [2021-12-18 19:50:07,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:07,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 19:50:07,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:07,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 19:50:07,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-12-18 19:50:07,114 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 21 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 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) [2021-12-18 19:50:07,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:07,294 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-12-18 19:50:07,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 19:50:07,294 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 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 26 [2021-12-18 19:50:07,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:07,294 INFO L225 Difference]: With dead ends: 34 [2021-12-18 19:50:07,294 INFO L226 Difference]: Without dead ends: 34 [2021-12-18 19:50:07,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2021-12-18 19:50:07,295 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 84 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:07,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 77 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:50:07,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-18 19:50:07,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-12-18 19:50:07,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.1) internal successors, (33), 31 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) [2021-12-18 19:50:07,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-12-18 19:50:07,296 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2021-12-18 19:50:07,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:07,296 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-12-18 19:50:07,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 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) [2021-12-18 19:50:07,297 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-12-18 19:50:07,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-18 19:50:07,297 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:07,297 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:07,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-18 19:50:07,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:07,498 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:07,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:07,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1095540269, now seen corresponding path program 3 times [2021-12-18 19:50:07,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:07,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868877870] [2021-12-18 19:50:07,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:07,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:07,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:07,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868877870] [2021-12-18 19:50:07,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868877870] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:07,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184610059] [2021-12-18 19:50:07,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:50:07,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:07,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:07,645 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) [2021-12-18 19:50:07,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 19:50:07,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 19:50:07,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:07,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-18 19:50:07,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:07,713 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 10 treesize of output 8 [2021-12-18 19:50:07,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:50:07,886 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 17 treesize of output 19 [2021-12-18 19:50:07,927 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 16 treesize of output 18 [2021-12-18 19:50:07,947 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 [2021-12-18 19:50:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:07,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:07,976 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_262 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_262) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-18 19:50:07,983 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_262 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_262) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) 0)) is different from false [2021-12-18 19:50:07,996 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_262 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_262) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 2)) 0)) is different from false [2021-12-18 19:50:08,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:50:08,002 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:50:08,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:50:08,007 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 37 [2021-12-18 19:50:08,010 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 11 treesize of output 7 [2021-12-18 19:50:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-12-18 19:50:08,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184610059] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:08,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:08,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 25 [2021-12-18 19:50:08,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926173018] [2021-12-18 19:50:08,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:08,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-18 19:50:08,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:08,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-18 19:50:08,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=402, Unknown=3, NotChecked=126, Total=600 [2021-12-18 19:50:08,163 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 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) [2021-12-18 19:50:08,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:08,340 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-12-18 19:50:08,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 19:50:08,341 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 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 [2021-12-18 19:50:08,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:08,341 INFO L225 Difference]: With dead ends: 52 [2021-12-18 19:50:08,341 INFO L226 Difference]: Without dead ends: 39 [2021-12-18 19:50:08,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=604, Unknown=3, NotChecked=156, Total=870 [2021-12-18 19:50:08,342 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:08,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 143 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 202 Invalid, 0 Unknown, 111 Unchecked, 0.1s Time] [2021-12-18 19:50:08,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-18 19:50:08,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-12-18 19:50:08,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 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) [2021-12-18 19:50:08,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-12-18 19:50:08,343 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 29 [2021-12-18 19:50:08,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:08,343 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-12-18 19:50:08,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 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) [2021-12-18 19:50:08,343 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-12-18 19:50:08,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-18 19:50:08,344 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:08,344 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:08,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-18 19:50:08,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:08,544 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:08,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:08,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1267943126, now seen corresponding path program 4 times [2021-12-18 19:50:08,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:08,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980296420] [2021-12-18 19:50:08,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:08,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:08,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:08,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980296420] [2021-12-18 19:50:08,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980296420] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:08,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534519178] [2021-12-18 19:50:08,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:50:08,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:08,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:08,649 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) [2021-12-18 19:50:08,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 19:50:08,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:50:08,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:08,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-18 19:50:08,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:08,727 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:50:08,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:50:08,734 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 10 treesize of output 8 [2021-12-18 19:50:08,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-12-18 19:50:09,028 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 19 treesize of output 21 [2021-12-18 19:50:09,144 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 19 treesize of output 21 [2021-12-18 19:50:09,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:50:09,237 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 20 treesize of output 20 [2021-12-18 19:50:09,368 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:09,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:09,679 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcpy_~from#1.offset_32| Int) (v_ArrVal_309 (Array Int Int))) (or (<= (+ |v_ULTIMATE.start_cstrcpy_~from#1.offset_32| 4) (select |c_#length| |c_ULTIMATE.start_main_~nondetString~0#1.base|)) (< |v_ULTIMATE.start_cstrcpy_~from#1.offset_32| 0) (< |c_ULTIMATE.start_main_~nondetString~0#1.offset| |v_ULTIMATE.start_cstrcpy_~from#1.offset_32|) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_309) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |v_ULTIMATE.start_cstrcpy_~from#1.offset_32| 2))))) is different from false [2021-12-18 19:50:09,690 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:50:09,690 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:50:09,696 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:50:09,696 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 37 [2021-12-18 19:50:09,700 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 11 treesize of output 7 [2021-12-18 19:50:10,296 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:10,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534519178] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:10,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:10,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 36 [2021-12-18 19:50:10,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795744312] [2021-12-18 19:50:10,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:10,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-18 19:50:10,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:10,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-18 19:50:10,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1103, Unknown=2, NotChecked=68, Total=1332 [2021-12-18 19:50:10,299 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 37 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 37 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) [2021-12-18 19:50:10,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:10,907 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-12-18 19:50:10,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 19:50:10,908 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 37 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) Word has length 33 [2021-12-18 19:50:10,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:10,908 INFO L225 Difference]: With dead ends: 48 [2021-12-18 19:50:10,908 INFO L226 Difference]: Without dead ends: 48 [2021-12-18 19:50:10,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=378, Invalid=2373, Unknown=9, NotChecked=102, Total=2862 [2021-12-18 19:50:10,911 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:10,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 115 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 196 Invalid, 0 Unknown, 94 Unchecked, 0.1s Time] [2021-12-18 19:50:10,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-18 19:50:10,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2021-12-18 19:50:10,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 42 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) [2021-12-18 19:50:10,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-12-18 19:50:10,913 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 33 [2021-12-18 19:50:10,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:10,913 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-12-18 19:50:10,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 37 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) [2021-12-18 19:50:10,914 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-12-18 19:50:10,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-18 19:50:10,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:10,916 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:10,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-18 19:50:11,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:11,131 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:11,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:11,132 INFO L85 PathProgramCache]: Analyzing trace with hash 651531229, now seen corresponding path program 3 times [2021-12-18 19:50:11,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:11,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400674216] [2021-12-18 19:50:11,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:11,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:11,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:11,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400674216] [2021-12-18 19:50:11,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400674216] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:11,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003091592] [2021-12-18 19:50:11,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:50:11,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:11,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:11,244 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) [2021-12-18 19:50:11,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 19:50:11,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 19:50:11,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:11,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-18 19:50:11,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:11,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:50:11,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 19:50:11,330 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 10 treesize of output 8 [2021-12-18 19:50:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:11,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:11,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003091592] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:11,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:11,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2021-12-18 19:50:11,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589391537] [2021-12-18 19:50:11,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:11,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-18 19:50:11,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:11,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-18 19:50:11,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-12-18 19:50:11,839 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 28 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 28 states have internal predecessors, (94), 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) [2021-12-18 19:50:12,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:12,106 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-12-18 19:50:12,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 19:50:12,107 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 28 states have internal predecessors, (94), 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 34 [2021-12-18 19:50:12,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:12,107 INFO L225 Difference]: With dead ends: 43 [2021-12-18 19:50:12,107 INFO L226 Difference]: Without dead ends: 43 [2021-12-18 19:50:12,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=267, Invalid=993, Unknown=0, NotChecked=0, Total=1260 [2021-12-18 19:50:12,108 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 131 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:12,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 90 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:50:12,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-18 19:50:12,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-18 19:50:12,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 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) [2021-12-18 19:50:12,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-12-18 19:50:12,109 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 34 [2021-12-18 19:50:12,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:12,109 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-12-18 19:50:12,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 28 states have internal predecessors, (94), 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) [2021-12-18 19:50:12,109 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-12-18 19:50:12,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-18 19:50:12,110 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:12,110 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:12,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 19:50:12,310 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,SelfDestructingSolverStorable22 [2021-12-18 19:50:12,310 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:12,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:12,311 INFO L85 PathProgramCache]: Analyzing trace with hash -671378910, now seen corresponding path program 4 times [2021-12-18 19:50:12,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:12,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466843903] [2021-12-18 19:50:12,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:12,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 19 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:12,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:12,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466843903] [2021-12-18 19:50:12,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466843903] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:12,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445092862] [2021-12-18 19:50:12,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:50:12,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:12,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:12,436 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) [2021-12-18 19:50:12,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 19:50:12,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:50:12,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:12,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-18 19:50:12,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:12,523 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:50:12,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:50:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:12,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:12,905 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 28 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:12,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445092862] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:12,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:12,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2021-12-18 19:50:12,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146455201] [2021-12-18 19:50:12,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:12,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-18 19:50:12,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:12,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-18 19:50:12,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-12-18 19:50:12,907 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 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) [2021-12-18 19:50:13,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:13,056 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2021-12-18 19:50:13,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 19:50:13,056 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 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 38 [2021-12-18 19:50:13,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:13,057 INFO L225 Difference]: With dead ends: 69 [2021-12-18 19:50:13,057 INFO L226 Difference]: Without dead ends: 50 [2021-12-18 19:50:13,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 19:50:13,058 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 65 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:13,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 77 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:50:13,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-18 19:50:13,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2021-12-18 19:50:13,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 46 states have internal predecessors, (48), 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) [2021-12-18 19:50:13,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-12-18 19:50:13,059 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 38 [2021-12-18 19:50:13,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:13,059 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-12-18 19:50:13,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 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) [2021-12-18 19:50:13,059 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-12-18 19:50:13,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-18 19:50:13,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:13,060 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:13,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 19:50:13,260 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,SelfDestructingSolverStorable23 [2021-12-18 19:50:13,260 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:13,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:13,260 INFO L85 PathProgramCache]: Analyzing trace with hash -452353921, now seen corresponding path program 5 times [2021-12-18 19:50:13,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:13,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715434334] [2021-12-18 19:50:13,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:13,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:13,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:13,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715434334] [2021-12-18 19:50:13,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715434334] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:13,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857803077] [2021-12-18 19:50:13,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:50:13,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:13,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:13,399 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) [2021-12-18 19:50:13,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 19:50:13,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-18 19:50:13,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:13,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-18 19:50:13,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:13,505 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:50:13,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:50:13,517 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 10 treesize of output 8 [2021-12-18 19:50:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:13,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:14,273 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:14,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857803077] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:14,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:14,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 33 [2021-12-18 19:50:14,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657694209] [2021-12-18 19:50:14,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:14,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-18 19:50:14,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:14,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-18 19:50:14,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2021-12-18 19:50:14,275 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 34 states, 33 states have (on average 3.5757575757575757) internal successors, (118), 34 states have internal predecessors, (118), 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) [2021-12-18 19:50:14,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:14,679 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2021-12-18 19:50:14,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 19:50:14,680 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.5757575757575757) internal successors, (118), 34 states have internal predecessors, (118), 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 42 [2021-12-18 19:50:14,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:14,680 INFO L225 Difference]: With dead ends: 50 [2021-12-18 19:50:14,680 INFO L226 Difference]: Without dead ends: 50 [2021-12-18 19:50:14,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=364, Invalid=1616, Unknown=0, NotChecked=0, Total=1980 [2021-12-18 19:50:14,681 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 231 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:14,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 150 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:50:14,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-18 19:50:14,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-12-18 19:50:14,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 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) [2021-12-18 19:50:14,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-12-18 19:50:14,682 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 42 [2021-12-18 19:50:14,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:14,682 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-12-18 19:50:14,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.5757575757575757) internal successors, (118), 34 states have internal predecessors, (118), 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) [2021-12-18 19:50:14,682 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-12-18 19:50:14,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-18 19:50:14,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:14,683 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:14,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-18 19:50:14,883 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,SelfDestructingSolverStorable24 [2021-12-18 19:50:14,883 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:14,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:14,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1531708431, now seen corresponding path program 5 times [2021-12-18 19:50:14,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:14,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314968276] [2021-12-18 19:50:14,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:14,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:15,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:15,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314968276] [2021-12-18 19:50:15,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314968276] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:15,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669936833] [2021-12-18 19:50:15,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:50:15,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:15,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:15,152 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) [2021-12-18 19:50:15,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 19:50:15,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-18 19:50:15,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:15,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-18 19:50:15,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:15,263 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 10 treesize of output 8 [2021-12-18 19:50:15,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:50:15,476 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 17 treesize of output 19 [2021-12-18 19:50:15,516 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 16 treesize of output 18 [2021-12-18 19:50:15,534 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 16 treesize of output 18 [2021-12-18 19:50:15,551 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 16 treesize of output 18 [2021-12-18 19:50:15,575 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 [2021-12-18 19:50:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:15,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:15,605 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_502 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_502) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-18 19:50:15,611 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_502 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_502) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) 0)) is different from false [2021-12-18 19:50:15,621 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_502 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_502) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3)) 0)) is different from false [2021-12-18 19:50:15,633 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_502 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_502) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-18 19:50:15,644 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_502 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_502) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 4)) 0)) is different from false [2021-12-18 19:50:15,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:50:15,649 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:50:15,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:50:15,653 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 37 [2021-12-18 19:50:15,656 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 11 treesize of output 7 [2021-12-18 19:50:15,822 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 35 not checked. [2021-12-18 19:50:15,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669936833] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:15,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:15,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 33 [2021-12-18 19:50:15,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960952926] [2021-12-18 19:50:15,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:15,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-18 19:50:15,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:15,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-18 19:50:15,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=684, Unknown=5, NotChecked=280, Total=1056 [2021-12-18 19:50:15,823 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 33 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) [2021-12-18 19:50:16,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:16,231 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-12-18 19:50:16,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 19:50:16,232 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 33 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 45 [2021-12-18 19:50:16,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:16,232 INFO L225 Difference]: With dead ends: 76 [2021-12-18 19:50:16,232 INFO L226 Difference]: Without dead ends: 55 [2021-12-18 19:50:16,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 73 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=1126, Unknown=5, NotChecked=360, Total=1640 [2021-12-18 19:50:16,233 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:16,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 273 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 534 Invalid, 0 Unknown, 249 Unchecked, 0.2s Time] [2021-12-18 19:50:16,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-18 19:50:16,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2021-12-18 19:50:16,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 50 states have (on average 1.06) internal successors, (53), 51 states have internal predecessors, (53), 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) [2021-12-18 19:50:16,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-12-18 19:50:16,235 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 45 [2021-12-18 19:50:16,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:16,235 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-12-18 19:50:16,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 33 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) [2021-12-18 19:50:16,235 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-12-18 19:50:16,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-18 19:50:16,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:16,235 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:16,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-18 19:50:16,436 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,SelfDestructingSolverStorable25 [2021-12-18 19:50:16,436 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:16,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:16,436 INFO L85 PathProgramCache]: Analyzing trace with hash 801080082, now seen corresponding path program 6 times [2021-12-18 19:50:16,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:16,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577866458] [2021-12-18 19:50:16,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:16,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:16,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:16,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:16,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577866458] [2021-12-18 19:50:16,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577866458] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:16,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731888110] [2021-12-18 19:50:16,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:50:16,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:16,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:16,602 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) [2021-12-18 19:50:16,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-18 19:50:16,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-18 19:50:16,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:16,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-18 19:50:16,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:16,733 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:50:16,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:50:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:17,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:17,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731888110] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:17,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:17,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2021-12-18 19:50:17,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373136506] [2021-12-18 19:50:17,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:17,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-18 19:50:17,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:17,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-18 19:50:17,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1391, Unknown=0, NotChecked=0, Total=1640 [2021-12-18 19:50:17,527 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 41 states, 40 states have (on average 3.475) internal successors, (139), 41 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) [2021-12-18 19:50:17,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:17,863 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2021-12-18 19:50:17,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 19:50:17,863 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.475) internal successors, (139), 41 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 49 [2021-12-18 19:50:17,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:17,864 INFO L225 Difference]: With dead ends: 59 [2021-12-18 19:50:17,864 INFO L226 Difference]: Without dead ends: 59 [2021-12-18 19:50:17,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=480, Invalid=1872, Unknown=0, NotChecked=0, Total=2352 [2021-12-18 19:50:17,865 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 225 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:17,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 124 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:50:17,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-18 19:50:17,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2021-12-18 19:50:17,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 54 states have internal predecessors, (56), 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) [2021-12-18 19:50:17,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-12-18 19:50:17,868 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 49 [2021-12-18 19:50:17,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:17,869 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-12-18 19:50:17,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.475) internal successors, (139), 41 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) [2021-12-18 19:50:17,869 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-12-18 19:50:17,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-18 19:50:17,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:17,869 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:17,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-18 19:50:18,089 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,SelfDestructingSolverStorable26 [2021-12-18 19:50:18,091 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:18,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:18,092 INFO L85 PathProgramCache]: Analyzing trace with hash -936321247, now seen corresponding path program 6 times [2021-12-18 19:50:18,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:18,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439267441] [2021-12-18 19:50:18,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:18,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:18,276 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:18,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:18,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439267441] [2021-12-18 19:50:18,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439267441] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:18,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973492012] [2021-12-18 19:50:18,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:50:18,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:18,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:18,278 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) [2021-12-18 19:50:18,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-18 19:50:18,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-18 19:50:18,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:18,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-18 19:50:18,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:18,405 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 10 treesize of output 8 [2021-12-18 19:50:18,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 19:50:18,859 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:50:18,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:50:19,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973492012] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:19,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:19,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 31 [2021-12-18 19:50:19,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952432770] [2021-12-18 19:50:19,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:19,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-18 19:50:19,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:19,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-18 19:50:19,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2021-12-18 19:50:19,342 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 32 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 32 states have internal predecessors, (110), 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) [2021-12-18 19:50:20,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:20,098 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2021-12-18 19:50:20,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 19:50:20,098 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 32 states have internal predecessors, (110), 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 50 [2021-12-18 19:50:20,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:20,099 INFO L225 Difference]: With dead ends: 81 [2021-12-18 19:50:20,099 INFO L226 Difference]: Without dead ends: 81 [2021-12-18 19:50:20,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=554, Invalid=2308, Unknown=0, NotChecked=0, Total=2862 [2021-12-18 19:50:20,103 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 170 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:20,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 205 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 545 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2021-12-18 19:50:20,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-18 19:50:20,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2021-12-18 19:50:20,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 75 states have internal predecessors, (82), 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) [2021-12-18 19:50:20,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2021-12-18 19:50:20,109 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 50 [2021-12-18 19:50:20,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:20,109 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2021-12-18 19:50:20,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 32 states have internal predecessors, (110), 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) [2021-12-18 19:50:20,109 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2021-12-18 19:50:20,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-18 19:50:20,110 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:20,110 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:20,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-18 19:50:20,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-18 19:50:20,320 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:20,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:20,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1866312237, now seen corresponding path program 7 times [2021-12-18 19:50:20,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:20,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633440015] [2021-12-18 19:50:20,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:20,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:20,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 11 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:20,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:20,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633440015] [2021-12-18 19:50:20,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633440015] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:20,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916559338] [2021-12-18 19:50:20,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:50:20,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:20,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:20,598 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) [2021-12-18 19:50:20,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-18 19:50:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:20,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-18 19:50:20,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:20,705 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 10 treesize of output 8 [2021-12-18 19:50:20,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:50:20,972 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 17 treesize of output 19 [2021-12-18 19:50:20,999 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 16 treesize of output 18 [2021-12-18 19:50:21,011 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 16 treesize of output 18 [2021-12-18 19:50:21,024 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 16 treesize of output 18 [2021-12-18 19:50:21,041 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 16 treesize of output 18 [2021-12-18 19:50:21,061 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 [2021-12-18 19:50:21,067 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 11 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:21,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:21,083 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_682 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_682) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-18 19:50:21,090 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_682 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_682) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) 0)) is different from false [2021-12-18 19:50:21,113 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_682 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_682) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3)) 0)) is different from false [2021-12-18 19:50:21,121 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_682 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_682) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-18 19:50:21,146 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_682 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_682) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 5)) 0)) is different from false [2021-12-18 19:50:21,154 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_682 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_682) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 5)) 0)) is different from false [2021-12-18 19:50:21,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:50:21,157 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:50:21,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:50:21,164 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 37 [2021-12-18 19:50:21,168 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 11 treesize of output 7 [2021-12-18 19:50:21,288 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 11 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 54 not checked. [2021-12-18 19:50:21,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916559338] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:21,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:21,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 37 [2021-12-18 19:50:21,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451505990] [2021-12-18 19:50:21,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:21,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-18 19:50:21,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:21,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-18 19:50:21,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=852, Unknown=6, NotChecked=378, Total=1332 [2021-12-18 19:50:21,289 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 37 states have internal predecessors, (109), 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) [2021-12-18 19:50:21,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:21,637 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2021-12-18 19:50:21,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 19:50:21,637 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 37 states have internal predecessors, (109), 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 53 [2021-12-18 19:50:21,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:21,639 INFO L225 Difference]: With dead ends: 108 [2021-12-18 19:50:21,639 INFO L226 Difference]: Without dead ends: 83 [2021-12-18 19:50:21,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 44 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=163, Invalid=1415, Unknown=6, NotChecked=486, Total=2070 [2021-12-18 19:50:21,640 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 346 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:21,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 327 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 665 Invalid, 0 Unknown, 346 Unchecked, 0.1s Time] [2021-12-18 19:50:21,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-18 19:50:21,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2021-12-18 19:50:21,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 1.1025641025641026) internal successors, (86), 79 states have internal predecessors, (86), 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) [2021-12-18 19:50:21,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2021-12-18 19:50:21,642 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 53 [2021-12-18 19:50:21,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:21,642 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2021-12-18 19:50:21,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 37 states have internal predecessors, (109), 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) [2021-12-18 19:50:21,642 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2021-12-18 19:50:21,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-18 19:50:21,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:21,642 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:21,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-18 19:50:21,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:21,843 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:21,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:21,843 INFO L85 PathProgramCache]: Analyzing trace with hash -795904464, now seen corresponding path program 8 times [2021-12-18 19:50:21,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:21,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644858477] [2021-12-18 19:50:21,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:21,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:22,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:22,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644858477] [2021-12-18 19:50:22,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644858477] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:22,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223170469] [2021-12-18 19:50:22,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:50:22,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:22,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:22,057 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) [2021-12-18 19:50:22,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-18 19:50:22,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:50:22,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:22,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-18 19:50:22,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:22,185 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:50:22,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:50:22,606 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:22,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:23,060 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:23,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223170469] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:23,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:23,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 44 [2021-12-18 19:50:23,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134485602] [2021-12-18 19:50:23,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:23,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-18 19:50:23,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:23,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-18 19:50:23,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1730, Unknown=0, NotChecked=0, Total=1980 [2021-12-18 19:50:23,063 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 45 states, 44 states have (on average 3.659090909090909) internal successors, (161), 45 states have internal predecessors, (161), 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) [2021-12-18 19:50:23,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:23,505 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2021-12-18 19:50:23,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 19:50:23,506 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.659090909090909) internal successors, (161), 45 states have internal predecessors, (161), 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 57 [2021-12-18 19:50:23,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:23,506 INFO L225 Difference]: With dead ends: 80 [2021-12-18 19:50:23,506 INFO L226 Difference]: Without dead ends: 80 [2021-12-18 19:50:23,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=627, Invalid=2795, Unknown=0, NotChecked=0, Total=3422 [2021-12-18 19:50:23,508 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 147 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:23,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 229 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:50:23,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-18 19:50:23,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-12-18 19:50:23,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 1.0897435897435896) internal successors, (85), 79 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) [2021-12-18 19:50:23,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2021-12-18 19:50:23,511 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 57 [2021-12-18 19:50:23,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:23,511 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2021-12-18 19:50:23,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.659090909090909) internal successors, (161), 45 states have internal predecessors, (161), 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) [2021-12-18 19:50:23,511 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2021-12-18 19:50:23,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-18 19:50:23,512 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:23,512 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:23,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-18 19:50:23,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:23,728 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:23,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:23,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1921179211, now seen corresponding path program 9 times [2021-12-18 19:50:23,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:23,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663460406] [2021-12-18 19:50:23,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:23,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:23,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:23,959 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 13 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:23,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:23,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663460406] [2021-12-18 19:50:23,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663460406] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:23,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294423853] [2021-12-18 19:50:23,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:50:23,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:23,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:23,961 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) [2021-12-18 19:50:23,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-18 19:50:24,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-18 19:50:24,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:24,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-18 19:50:24,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:24,154 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 10 treesize of output 8 [2021-12-18 19:50:24,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:50:24,446 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 17 treesize of output 19 [2021-12-18 19:50:24,485 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 16 treesize of output 18 [2021-12-18 19:50:24,501 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 16 treesize of output 18 [2021-12-18 19:50:24,517 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 16 treesize of output 18 [2021-12-18 19:50:24,534 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 16 treesize of output 18 [2021-12-18 19:50:24,549 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 16 treesize of output 18 [2021-12-18 19:50:24,560 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 [2021-12-18 19:50:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 13 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:24,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:24,608 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_821 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_821) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-18 19:50:24,614 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_821 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_821) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) 0)) is different from false [2021-12-18 19:50:24,623 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_821 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_821) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3)) 0)) is different from false [2021-12-18 19:50:24,633 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_821 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_821) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-18 19:50:24,642 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_821 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_821) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 5)) 0)) is different from false [2021-12-18 19:50:24,651 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_821 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_821) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 6)) 0)) is different from false [2021-12-18 19:50:24,661 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_821 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_821) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 6)) 0)) is different from false [2021-12-18 19:50:24,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:50:24,665 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:50:24,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:50:24,670 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 37 [2021-12-18 19:50:24,672 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 11 treesize of output 7 [2021-12-18 19:50:24,871 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 13 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 77 not checked. [2021-12-18 19:50:24,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294423853] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:24,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:24,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 21] total 41 [2021-12-18 19:50:24,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11872998] [2021-12-18 19:50:24,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:24,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-18 19:50:24,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:24,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-18 19:50:24,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1038, Unknown=7, NotChecked=490, Total=1640 [2021-12-18 19:50:24,873 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand has 41 states, 41 states have (on average 3.024390243902439) internal successors, (124), 41 states have internal predecessors, (124), 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) [2021-12-18 19:50:25,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:25,410 INFO L93 Difference]: Finished difference Result 116 states and 121 transitions. [2021-12-18 19:50:25,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 19:50:25,411 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.024390243902439) internal successors, (124), 41 states have internal predecessors, (124), 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 [2021-12-18 19:50:25,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:25,411 INFO L225 Difference]: With dead ends: 116 [2021-12-18 19:50:25,411 INFO L226 Difference]: Without dead ends: 87 [2021-12-18 19:50:25,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 103 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=163, Invalid=1664, Unknown=7, NotChecked=616, Total=2450 [2021-12-18 19:50:25,412 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 504 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:25,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 427 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 904 Invalid, 0 Unknown, 504 Unchecked, 0.3s Time] [2021-12-18 19:50:25,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-18 19:50:25,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2021-12-18 19:50:25,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 82 states have (on average 1.0853658536585367) internal successors, (89), 83 states have internal predecessors, (89), 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) [2021-12-18 19:50:25,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2021-12-18 19:50:25,414 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 61 [2021-12-18 19:50:25,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:25,414 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2021-12-18 19:50:25,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.024390243902439) internal successors, (124), 41 states have internal predecessors, (124), 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) [2021-12-18 19:50:25,415 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2021-12-18 19:50:25,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-18 19:50:25,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:25,416 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:25,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-18 19:50:25,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:25,631 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:25,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:25,631 INFO L85 PathProgramCache]: Analyzing trace with hash 940963662, now seen corresponding path program 10 times [2021-12-18 19:50:25,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:25,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799794206] [2021-12-18 19:50:25,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:25,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 45 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:25,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:25,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799794206] [2021-12-18 19:50:25,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799794206] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:25,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412863164] [2021-12-18 19:50:25,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:50:25,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:25,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:25,846 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) [2021-12-18 19:50:25,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-18 19:50:25,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:50:25,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:25,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-18 19:50:25,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:25,963 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:50:25,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:50:25,971 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 10 treesize of output 8 [2021-12-18 19:50:26,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-12-18 19:50:26,353 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 18 treesize of output 20 [2021-12-18 19:50:26,416 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 18 treesize of output 20 [2021-12-18 19:50:26,457 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 18 treesize of output 20 [2021-12-18 19:50:26,510 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 18 treesize of output 20 [2021-12-18 19:50:26,574 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 18 treesize of output 20 [2021-12-18 19:50:26,620 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 18 treesize of output 20 [2021-12-18 19:50:26,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:50:26,699 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 19 treesize of output 19 [2021-12-18 19:50:26,808 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 72 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:26,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:27,438 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_904 (Array Int Int)) (|v_ULTIMATE.start_cstrcpy_~from#1.offset_136| Int)) (or (< |v_ULTIMATE.start_cstrcpy_~from#1.offset_136| 0) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_904) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |v_ULTIMATE.start_cstrcpy_~from#1.offset_136| 6))) (<= (+ |v_ULTIMATE.start_cstrcpy_~from#1.offset_136| 8) (select |c_#length| |c_ULTIMATE.start_main_~nondetString~0#1.base|)) (< |c_ULTIMATE.start_main_~nondetString~0#1.offset| |v_ULTIMATE.start_cstrcpy_~from#1.offset_136|))) is different from false [2021-12-18 19:50:27,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:50:27,446 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:50:27,452 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:50:27,452 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 37 [2021-12-18 19:50:27,455 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 11 treesize of output 7 [2021-12-18 19:50:28,405 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:28,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412863164] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:28,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:28,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 59 [2021-12-18 19:50:28,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149039201] [2021-12-18 19:50:28,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:28,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-18 19:50:28,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:28,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-18 19:50:28,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=3046, Unknown=2, NotChecked=114, Total=3540 [2021-12-18 19:50:28,409 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 60 states, 59 states have (on average 3.169491525423729) internal successors, (187), 60 states have internal predecessors, (187), 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) [2021-12-18 19:50:29,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:29,531 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2021-12-18 19:50:29,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-18 19:50:29,532 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 3.169491525423729) internal successors, (187), 60 states have internal predecessors, (187), 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 [2021-12-18 19:50:29,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:29,533 INFO L225 Difference]: With dead ends: 84 [2021-12-18 19:50:29,533 INFO L226 Difference]: Without dead ends: 84 [2021-12-18 19:50:29,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=858, Invalid=4986, Unknown=12, NotChecked=150, Total=6006 [2021-12-18 19:50:29,536 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 153 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 365 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:29,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 416 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 921 Invalid, 0 Unknown, 365 Unchecked, 0.4s Time] [2021-12-18 19:50:29,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-18 19:50:29,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-12-18 19:50:29,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 82 states have (on average 1.0609756097560976) internal successors, (87), 83 states have internal predecessors, (87), 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) [2021-12-18 19:50:29,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2021-12-18 19:50:29,540 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 65 [2021-12-18 19:50:29,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:29,540 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2021-12-18 19:50:29,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 3.169491525423729) internal successors, (187), 60 states have internal predecessors, (187), 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) [2021-12-18 19:50:29,540 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2021-12-18 19:50:29,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-18 19:50:29,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:29,543 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:29,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-18 19:50:29,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:29,762 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:29,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:29,762 INFO L85 PathProgramCache]: Analyzing trace with hash -75938812, now seen corresponding path program 11 times [2021-12-18 19:50:29,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:29,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354817142] [2021-12-18 19:50:29,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:29,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 124 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:30,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:30,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354817142] [2021-12-18 19:50:30,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354817142] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:30,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869362421] [2021-12-18 19:50:30,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:50:30,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:30,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:30,014 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) [2021-12-18 19:50:30,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-18 19:50:30,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-18 19:50:30,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:30,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-18 19:50:30,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:30,310 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:50:30,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:50:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 153 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:30,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 153 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:31,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869362421] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:31,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:31,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 49 [2021-12-18 19:50:31,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077034852] [2021-12-18 19:50:31,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:31,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-18 19:50:31,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:31,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-18 19:50:31,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1908, Unknown=0, NotChecked=0, Total=2352 [2021-12-18 19:50:31,120 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 49 states, 49 states have (on average 3.5510204081632653) internal successors, (174), 49 states have internal predecessors, (174), 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) [2021-12-18 19:50:31,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:31,329 INFO L93 Difference]: Finished difference Result 126 states and 129 transitions. [2021-12-18 19:50:31,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 19:50:31,330 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.5510204081632653) internal successors, (174), 49 states have internal predecessors, (174), 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 73 [2021-12-18 19:50:31,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:31,330 INFO L225 Difference]: With dead ends: 126 [2021-12-18 19:50:31,330 INFO L226 Difference]: Without dead ends: 91 [2021-12-18 19:50:31,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=732, Invalid=2690, Unknown=0, NotChecked=0, Total=3422 [2021-12-18 19:50:31,331 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 83 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:31,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 146 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:50:31,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-18 19:50:31,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2021-12-18 19:50:31,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 86 states have (on average 1.058139534883721) internal successors, (91), 87 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) [2021-12-18 19:50:31,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2021-12-18 19:50:31,333 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 73 [2021-12-18 19:50:31,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:31,333 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2021-12-18 19:50:31,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.5510204081632653) internal successors, (174), 49 states have internal predecessors, (174), 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) [2021-12-18 19:50:31,333 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2021-12-18 19:50:31,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-18 19:50:31,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:31,333 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:31,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-18 19:50:31,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:31,534 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:31,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:31,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1816661881, now seen corresponding path program 12 times [2021-12-18 19:50:31,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:31,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052941978] [2021-12-18 19:50:31,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:31,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:31,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 17 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:31,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:31,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052941978] [2021-12-18 19:50:31,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052941978] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:31,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748256474] [2021-12-18 19:50:31,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:50:31,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:31,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:31,885 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) [2021-12-18 19:50:31,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-18 19:50:32,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-18 19:50:32,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:32,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 102 conjunts are in the unsatisfiable core [2021-12-18 19:50:32,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:32,476 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 10 treesize of output 8 [2021-12-18 19:50:32,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:50:32,918 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 17 treesize of output 19 [2021-12-18 19:50:32,958 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 16 treesize of output 18 [2021-12-18 19:50:32,973 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 16 treesize of output 18 [2021-12-18 19:50:32,990 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 16 treesize of output 18 [2021-12-18 19:50:33,007 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 16 treesize of output 18 [2021-12-18 19:50:33,023 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 16 treesize of output 18 [2021-12-18 19:50:33,038 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 16 treesize of output 18 [2021-12-18 19:50:33,055 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 16 treesize of output 18 [2021-12-18 19:50:33,083 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 [2021-12-18 19:50:33,089 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 17 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:33,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:33,116 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1078 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1078) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-18 19:50:33,126 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1078 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1078) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) 0)) is different from false [2021-12-18 19:50:33,135 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1078 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1078) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3)) 0)) is different from false [2021-12-18 19:50:33,145 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1078 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1078) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-18 19:50:33,154 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1078 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1078) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 5)) 0)) is different from false [2021-12-18 19:50:33,163 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1078 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1078) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 6)) 0)) is different from false [2021-12-18 19:50:33,173 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1078 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1078) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 7)) 0)) is different from false [2021-12-18 19:50:33,182 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1078 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1078) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 8)) 0)) is different from false [2021-12-18 19:50:33,191 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1078 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_1078) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 8)) 0)) is different from false [2021-12-18 19:50:33,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:50:33,196 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:50:33,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:50:33,200 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 37 [2021-12-18 19:50:33,202 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 11 treesize of output 7 [2021-12-18 19:50:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 17 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 135 not checked. [2021-12-18 19:50:33,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748256474] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:33,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:33,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 49 [2021-12-18 19:50:33,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064042472] [2021-12-18 19:50:33,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:33,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-18 19:50:33,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:33,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-18 19:50:33,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1464, Unknown=9, NotChecked=756, Total=2352 [2021-12-18 19:50:33,440 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 49 states, 49 states have (on average 3.204081632653061) internal successors, (157), 49 states have internal predecessors, (157), 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) [2021-12-18 19:50:34,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:34,269 INFO L93 Difference]: Finished difference Result 132 states and 135 transitions. [2021-12-18 19:50:34,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-18 19:50:34,269 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.204081632653061) internal successors, (157), 49 states have internal predecessors, (157), 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 [2021-12-18 19:50:34,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:34,270 INFO L225 Difference]: With dead ends: 132 [2021-12-18 19:50:34,270 INFO L226 Difference]: Without dead ends: 95 [2021-12-18 19:50:34,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 133 SyntacticMatches, 12 SemanticMatches, 59 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=205, Invalid=2474, Unknown=9, NotChecked=972, Total=3660 [2021-12-18 19:50:34,271 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 52 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 1942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 626 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:34,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 607 Invalid, 1942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1302 Invalid, 0 Unknown, 626 Unchecked, 0.4s Time] [2021-12-18 19:50:34,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-18 19:50:34,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2021-12-18 19:50:34,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 90 states have (on average 1.0555555555555556) internal successors, (95), 91 states have internal predecessors, (95), 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) [2021-12-18 19:50:34,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2021-12-18 19:50:34,272 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 77 [2021-12-18 19:50:34,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:34,272 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2021-12-18 19:50:34,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.204081632653061) internal successors, (157), 49 states have internal predecessors, (157), 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) [2021-12-18 19:50:34,273 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2021-12-18 19:50:34,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-18 19:50:34,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:34,273 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:34,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-18 19:50:34,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:34,483 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:34,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:34,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1542890378, now seen corresponding path program 13 times [2021-12-18 19:50:34,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:34,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484215695] [2021-12-18 19:50:34,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:34,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:34,753 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 91 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:34,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:34,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484215695] [2021-12-18 19:50:34,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484215695] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:34,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520026627] [2021-12-18 19:50:34,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:50:34,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:34,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:34,755 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) [2021-12-18 19:50:34,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-18 19:50:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:34,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-18 19:50:34,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 120 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:35,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:35,621 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 5 treesize of output 3 [2021-12-18 19:50:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 120 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:35,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520026627] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:35,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:35,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 23] total 46 [2021-12-18 19:50:35,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639639597] [2021-12-18 19:50:35,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:35,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-18 19:50:35,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:35,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-18 19:50:35,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1930, Unknown=0, NotChecked=0, Total=2162 [2021-12-18 19:50:35,686 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand has 47 states, 46 states have (on average 3.5652173913043477) internal successors, (164), 47 states have internal predecessors, (164), 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) [2021-12-18 19:50:36,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:36,277 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2021-12-18 19:50:36,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 19:50:36,278 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 3.5652173913043477) internal successors, (164), 47 states have internal predecessors, (164), 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 [2021-12-18 19:50:36,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:36,279 INFO L225 Difference]: With dead ends: 92 [2021-12-18 19:50:36,279 INFO L226 Difference]: Without dead ends: 92 [2021-12-18 19:50:36,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=818, Invalid=3604, Unknown=0, NotChecked=0, Total=4422 [2021-12-18 19:50:36,288 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 277 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:36,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 433 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1164 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:50:36,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-18 19:50:36,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-12-18 19:50:36,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 91 states have internal predecessors, (94), 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) [2021-12-18 19:50:36,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2021-12-18 19:50:36,293 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 81 [2021-12-18 19:50:36,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:36,294 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2021-12-18 19:50:36,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 3.5652173913043477) internal successors, (164), 47 states have internal predecessors, (164), 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) [2021-12-18 19:50:36,294 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2021-12-18 19:50:36,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-18 19:50:36,295 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:36,295 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:36,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-18 19:50:36,518 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,SelfDestructingSolverStorable34 [2021-12-18 19:50:36,519 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:36,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:36,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1904201381, now seen corresponding path program 14 times [2021-12-18 19:50:36,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:36,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591976303] [2021-12-18 19:50:36,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:36,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:37,008 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 19 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:37,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:37,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591976303] [2021-12-18 19:50:37,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591976303] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:37,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871659211] [2021-12-18 19:50:37,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:50:37,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:37,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:37,016 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) [2021-12-18 19:50:37,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-18 19:50:37,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:50:37,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:37,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 106 conjunts are in the unsatisfiable core [2021-12-18 19:50:37,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:37,172 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 10 treesize of output 8 [2021-12-18 19:50:37,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 19:50:37,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:50:37,899 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 17 treesize of output 19 [2021-12-18 19:50:38,038 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 17 treesize of output 19 [2021-12-18 19:50:38,179 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 17 treesize of output 19 [2021-12-18 19:50:38,328 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 17 treesize of output 19 [2021-12-18 19:50:38,439 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 17 treesize of output 19 [2021-12-18 19:50:38,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:50:38,640 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 17 treesize of output 19 [2021-12-18 19:50:38,744 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 17 treesize of output 19 [2021-12-18 19:50:38,873 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 17 treesize of output 19 [2021-12-18 19:50:39,016 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:50:39,016 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 18 treesize of output 18 [2021-12-18 19:50:39,142 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 120 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:39,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:40,097 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcpy_~from#1.offset_212| Int) (v_ArrVal_1268 (Array Int Int))) (or (< |c_ULTIMATE.start_main_~nondetString~0#1.offset| |v_ULTIMATE.start_cstrcpy_~from#1.offset_212|) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_1268) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |v_ULTIMATE.start_cstrcpy_~from#1.offset_212| 9))) (< |v_ULTIMATE.start_cstrcpy_~from#1.offset_212| 0) (<= (+ |v_ULTIMATE.start_cstrcpy_~from#1.offset_212| 11) (select |c_#length| |c_ULTIMATE.start_main_~nondetString~0#1.base|)))) is different from false [2021-12-18 19:50:40,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:50:40,104 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:50:40,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:50:40,109 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 37 [2021-12-18 19:50:40,112 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 11 treesize of output 7 [2021-12-18 19:50:41,656 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 153 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:41,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871659211] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:41,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:41,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 78 [2021-12-18 19:50:41,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927096087] [2021-12-18 19:50:41,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:41,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-12-18 19:50:41,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:41,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-12-18 19:50:41,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=5428, Unknown=3, NotChecked=150, Total=6006 [2021-12-18 19:50:41,658 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 78 states, 78 states have (on average 3.1666666666666665) internal successors, (247), 78 states have internal predecessors, (247), 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) [2021-12-18 19:50:43,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:43,031 INFO L93 Difference]: Finished difference Result 142 states and 143 transitions. [2021-12-18 19:50:43,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-18 19:50:43,031 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.1666666666666665) internal successors, (247), 78 states have internal predecessors, (247), 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 85 [2021-12-18 19:50:43,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:43,032 INFO L225 Difference]: With dead ends: 142 [2021-12-18 19:50:43,032 INFO L226 Difference]: Without dead ends: 101 [2021-12-18 19:50:43,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=915, Invalid=10006, Unknown=3, NotChecked=206, Total=11130 [2021-12-18 19:50:43,033 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 145 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 596 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:43,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 827 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 966 Invalid, 0 Unknown, 596 Unchecked, 0.3s Time] [2021-12-18 19:50:43,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-18 19:50:43,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2021-12-18 19:50:43,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 95 states have internal predecessors, (97), 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) [2021-12-18 19:50:43,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2021-12-18 19:50:43,035 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 85 [2021-12-18 19:50:43,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:43,036 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2021-12-18 19:50:43,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.1666666666666665) internal successors, (247), 78 states have internal predecessors, (247), 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) [2021-12-18 19:50:43,036 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2021-12-18 19:50:43,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-18 19:50:43,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:43,036 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:43,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-18 19:50:43,253 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,SelfDestructingSolverStorable35 [2021-12-18 19:50:43,253 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:43,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:43,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1102366013, now seen corresponding path program 15 times [2021-12-18 19:50:43,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:43,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916315944] [2021-12-18 19:50:43,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:43,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:43,808 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 21 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:43,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:43,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916315944] [2021-12-18 19:50:43,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916315944] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:43,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807318432] [2021-12-18 19:50:43,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:50:43,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:43,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:43,810 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) [2021-12-18 19:50:43,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-18 19:50:44,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-18 19:50:44,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:44,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 120 conjunts are in the unsatisfiable core [2021-12-18 19:50:44,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:44,372 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 10 treesize of output 8 [2021-12-18 19:50:44,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:50:44,772 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 17 treesize of output 19 [2021-12-18 19:50:44,817 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 16 treesize of output 18 [2021-12-18 19:50:44,829 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 16 treesize of output 18 [2021-12-18 19:50:44,841 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 16 treesize of output 18 [2021-12-18 19:50:44,854 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 16 treesize of output 18 [2021-12-18 19:50:44,867 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 16 treesize of output 18 [2021-12-18 19:50:44,880 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 16 treesize of output 18 [2021-12-18 19:50:44,899 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 16 treesize of output 18 [2021-12-18 19:50:44,911 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 16 treesize of output 18 [2021-12-18 19:50:44,924 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 16 treesize of output 18 [2021-12-18 19:50:44,932 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 [2021-12-18 19:50:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 21 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:44,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:44,991 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1379 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1379) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-18 19:50:44,996 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1379 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1379) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) 0)) is different from false [2021-12-18 19:50:45,003 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1379 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1379) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3)) 0)) is different from false [2021-12-18 19:50:45,011 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1379 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1379) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-18 19:50:45,019 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1379 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1379) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 5)) 0)) is different from false [2021-12-18 19:50:45,028 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1379 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1379) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 6)) 0)) is different from false [2021-12-18 19:50:45,036 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1379 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1379) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 7)) 0)) is different from false [2021-12-18 19:50:45,044 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1379 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1379) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 8)) 0)) is different from false [2021-12-18 19:50:45,051 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1379 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1379) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 9)) 0)) is different from false [2021-12-18 19:50:45,059 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1379 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1379) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 10)) 0)) is different from false [2021-12-18 19:50:45,068 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1379 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_1379) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 10)) 0)) is different from false [2021-12-18 19:50:45,071 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:50:45,071 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:50:45,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:50:45,075 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 37 [2021-12-18 19:50:45,077 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 11 treesize of output 7 [2021-12-18 19:50:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 21 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 209 not checked. [2021-12-18 19:50:45,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807318432] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:45,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:45,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 29] total 57 [2021-12-18 19:50:45,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824073911] [2021-12-18 19:50:45,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:45,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-18 19:50:45,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:45,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-18 19:50:45,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1962, Unknown=11, NotChecked=1078, Total=3192 [2021-12-18 19:50:45,287 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 57 states, 57 states have (on average 3.2982456140350878) internal successors, (188), 57 states have internal predecessors, (188), 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) [2021-12-18 19:50:46,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:46,106 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2021-12-18 19:50:46,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-18 19:50:46,107 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.2982456140350878) internal successors, (188), 57 states have internal predecessors, (188), 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 [2021-12-18 19:50:46,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:46,108 INFO L225 Difference]: With dead ends: 148 [2021-12-18 19:50:46,108 INFO L226 Difference]: Without dead ends: 103 [2021-12-18 19:50:46,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 163 SyntacticMatches, 14 SemanticMatches, 68 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=219, Invalid=3236, Unknown=11, NotChecked=1364, Total=4830 [2021-12-18 19:50:46,109 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 51 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 2063 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 3137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1058 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:46,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 878 Invalid, 3137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2063 Invalid, 0 Unknown, 1058 Unchecked, 0.5s Time] [2021-12-18 19:50:46,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-18 19:50:46,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2021-12-18 19:50:46,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 98 states have (on average 1.030612244897959) internal successors, (101), 99 states have internal predecessors, (101), 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) [2021-12-18 19:50:46,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2021-12-18 19:50:46,118 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 93 [2021-12-18 19:50:46,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:46,118 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2021-12-18 19:50:46,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.2982456140350878) internal successors, (188), 57 states have internal predecessors, (188), 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) [2021-12-18 19:50:46,119 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2021-12-18 19:50:46,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-18 19:50:46,119 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:46,119 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:46,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-18 19:50:46,327 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,SelfDestructingSolverStorable36 [2021-12-18 19:50:46,327 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:46,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:46,328 INFO L85 PathProgramCache]: Analyzing trace with hash 46237638, now seen corresponding path program 16 times [2021-12-18 19:50:46,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:46,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738070837] [2021-12-18 19:50:46,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:46,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 153 proven. 309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:46,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:46,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738070837] [2021-12-18 19:50:46,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738070837] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:46,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866779048] [2021-12-18 19:50:46,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:50:46,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:46,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:46,754 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) [2021-12-18 19:50:46,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-18 19:50:46,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:50:46,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:46,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 120 conjunts are in the unsatisfiable core [2021-12-18 19:50:46,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:46,948 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 10 treesize of output 8 [2021-12-18 19:50:46,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 19:50:47,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-12-18 19:50:47,500 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 18 treesize of output 20 [2021-12-18 19:50:47,546 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 18 treesize of output 20 [2021-12-18 19:50:47,594 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 18 treesize of output 20 [2021-12-18 19:50:47,642 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 18 treesize of output 20 [2021-12-18 19:50:47,692 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 18 treesize of output 20 [2021-12-18 19:50:47,745 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 18 treesize of output 20 [2021-12-18 19:50:47,796 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 18 treesize of output 20 [2021-12-18 19:50:47,848 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 18 treesize of output 20 [2021-12-18 19:50:47,900 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 18 treesize of output 20 [2021-12-18 19:50:47,975 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 18 treesize of output 20 [2021-12-18 19:50:48,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:50:48,077 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 19 treesize of output 19 [2021-12-18 19:50:48,214 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 200 proven. 262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:48,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:49,185 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcpy_~from#1.offset_257| Int) (v_ArrVal_1497 (Array Int Int))) (or (<= (+ |v_ULTIMATE.start_cstrcpy_~from#1.offset_257| 12) (select |c_#length| |c_ULTIMATE.start_main_~nondetString~0#1.base|)) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_1497) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |v_ULTIMATE.start_cstrcpy_~from#1.offset_257| 10))) (< |v_ULTIMATE.start_cstrcpy_~from#1.offset_257| 0) (< |c_ULTIMATE.start_main_~nondetString~0#1.offset| |v_ULTIMATE.start_cstrcpy_~from#1.offset_257|))) is different from false [2021-12-18 19:50:49,193 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:50:49,193 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:50:49,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:50:49,199 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 37 [2021-12-18 19:50:49,203 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 11 treesize of output 7 [2021-12-18 19:50:50,799 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 231 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:50,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866779048] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:50,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:50,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 30, 30] total 84 [2021-12-18 19:50:50,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845181422] [2021-12-18 19:50:50,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:50,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-12-18 19:50:50,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:50,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-12-18 19:50:50,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=6188, Unknown=2, NotChecked=164, Total=7140 [2021-12-18 19:50:50,803 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 85 states, 84 states have (on average 3.369047619047619) internal successors, (283), 85 states have internal predecessors, (283), 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) [2021-12-18 19:50:52,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:52,460 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2021-12-18 19:50:52,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-18 19:50:52,460 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 3.369047619047619) internal successors, (283), 85 states have internal predecessors, (283), 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 [2021-12-18 19:50:52,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:52,461 INFO L225 Difference]: With dead ends: 112 [2021-12-18 19:50:52,461 INFO L226 Difference]: Without dead ends: 112 [2021-12-18 19:50:52,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 158 SyntacticMatches, 4 SemanticMatches, 106 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1665, Invalid=9668, Unknown=13, NotChecked=210, Total=11556 [2021-12-18 19:50:52,463 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 294 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 1311 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 2056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 544 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:52,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 713 Invalid, 2056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1311 Invalid, 0 Unknown, 544 Unchecked, 0.5s Time] [2021-12-18 19:50:52,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-18 19:50:52,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2021-12-18 19:50:52,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 106 states have internal predecessors, (109), 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) [2021-12-18 19:50:52,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2021-12-18 19:50:52,466 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 97 [2021-12-18 19:50:52,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:52,466 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2021-12-18 19:50:52,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 3.369047619047619) internal successors, (283), 85 states have internal predecessors, (283), 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) [2021-12-18 19:50:52,466 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2021-12-18 19:50:52,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-18 19:50:52,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:52,467 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:52,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-18 19:50:52,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:52,667 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:52,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:52,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1433366765, now seen corresponding path program 7 times [2021-12-18 19:50:52,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:52,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507818428] [2021-12-18 19:50:52,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:52,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:52,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 153 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:53,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:53,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507818428] [2021-12-18 19:50:53,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507818428] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:53,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941723072] [2021-12-18 19:50:53,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:50:53,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:53,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:53,089 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) [2021-12-18 19:50:53,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-18 19:50:53,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:53,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-18 19:50:53,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:53,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:50:53,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 19:50:53,318 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 10 treesize of output 8 [2021-12-18 19:50:54,244 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 190 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:54,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:55,427 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 231 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:55,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941723072] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:55,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:55,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 74 [2021-12-18 19:50:55,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64439150] [2021-12-18 19:50:55,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:55,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-18 19:50:55,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:55,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-18 19:50:55,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=4920, Unknown=0, NotChecked=0, Total=5550 [2021-12-18 19:50:55,430 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand has 75 states, 74 states have (on average 3.8513513513513513) internal successors, (285), 75 states have internal predecessors, (285), 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) [2021-12-18 19:50:56,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:56,331 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2021-12-18 19:50:56,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-18 19:50:56,331 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 3.8513513513513513) internal successors, (285), 75 states have internal predecessors, (285), 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 98 [2021-12-18 19:50:56,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:56,332 INFO L225 Difference]: With dead ends: 107 [2021-12-18 19:50:56,332 INFO L226 Difference]: Without dead ends: 107 [2021-12-18 19:50:56,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2186 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1667, Invalid=8035, Unknown=0, NotChecked=0, Total=9702 [2021-12-18 19:50:56,333 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 298 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 1729 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 1824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:56,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 612 Invalid, 1824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1729 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 19:50:56,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-18 19:50:56,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-12-18 19:50:56,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 106 states have internal predecessors, (108), 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) [2021-12-18 19:50:56,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2021-12-18 19:50:56,335 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 98 [2021-12-18 19:50:56,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:56,335 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2021-12-18 19:50:56,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 3.8513513513513513) internal successors, (285), 75 states have internal predecessors, (285), 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) [2021-12-18 19:50:56,335 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2021-12-18 19:50:56,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-18 19:50:56,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:56,336 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:56,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-18 19:50:56,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-18 19:50:56,553 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:56,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:56,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1027630898, now seen corresponding path program 8 times [2021-12-18 19:50:56,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:56,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559974012] [2021-12-18 19:50:56,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:56,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:56,881 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 243 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:56,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:56,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559974012] [2021-12-18 19:50:56,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559974012] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:56,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491882758] [2021-12-18 19:50:56,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:50:56,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:56,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:56,883 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) [2021-12-18 19:50:56,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-18 19:50:57,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:50:57,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:57,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-18 19:50:57,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:57,098 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:50:57,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:50:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 288 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:57,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:58,416 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 276 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:58,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491882758] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:58,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:58,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 68 [2021-12-18 19:50:58,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611571292] [2021-12-18 19:50:58,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:58,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-18 19:50:58,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:58,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-18 19:50:58,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=3769, Unknown=0, NotChecked=0, Total=4556 [2021-12-18 19:50:58,419 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 68 states, 68 states have (on average 3.661764705882353) internal successors, (249), 68 states have internal predecessors, (249), 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) [2021-12-18 19:50:59,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:59,045 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2021-12-18 19:50:59,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-18 19:50:59,045 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.661764705882353) internal successors, (249), 68 states have internal predecessors, (249), 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 102 [2021-12-18 19:50:59,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:59,046 INFO L225 Difference]: With dead ends: 165 [2021-12-18 19:50:59,046 INFO L226 Difference]: Without dead ends: 114 [2021-12-18 19:50:59,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2169 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1614, Invalid=6942, Unknown=0, NotChecked=0, Total=8556 [2021-12-18 19:50:59,047 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 129 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:59,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 233 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:50:59,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-18 19:50:59,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2021-12-18 19:50:59,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 109 states have (on average 1.0275229357798166) internal successors, (112), 110 states have internal predecessors, (112), 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) [2021-12-18 19:50:59,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2021-12-18 19:50:59,049 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 102 [2021-12-18 19:50:59,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:59,049 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2021-12-18 19:50:59,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.661764705882353) internal successors, (249), 68 states have internal predecessors, (249), 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) [2021-12-18 19:50:59,050 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2021-12-18 19:50:59,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-18 19:50:59,050 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:59,050 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:59,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-18 19:50:59,267 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,SelfDestructingSolverStorable39 [2021-12-18 19:50:59,267 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:50:59,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:59,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1855124081, now seen corresponding path program 9 times [2021-12-18 19:50:59,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:59,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580073493] [2021-12-18 19:50:59,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:59,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 190 proven. 374 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:59,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:59,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580073493] [2021-12-18 19:50:59,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580073493] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:59,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161961691] [2021-12-18 19:50:59,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:50:59,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:59,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:59,638 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) [2021-12-18 19:50:59,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-18 19:51:01,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-12-18 19:51:01,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:51:01,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-18 19:51:01,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:51:01,502 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:51:01,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:51:01,511 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 10 treesize of output 8 [2021-12-18 19:51:02,417 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 231 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:02,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:51:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 276 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:03,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161961691] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:51:03,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:51:03,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 81 [2021-12-18 19:51:03,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176606683] [2021-12-18 19:51:03,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:51:03,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-18 19:51:03,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:51:03,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-18 19:51:03,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=873, Invalid=5769, Unknown=0, NotChecked=0, Total=6642 [2021-12-18 19:51:03,648 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 82 states, 81 states have (on average 3.8271604938271606) internal successors, (310), 82 states have internal predecessors, (310), 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) [2021-12-18 19:51:04,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:51:04,773 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2021-12-18 19:51:04,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-18 19:51:04,773 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 3.8271604938271606) internal successors, (310), 82 states have internal predecessors, (310), 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 106 [2021-12-18 19:51:04,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:51:04,774 INFO L225 Difference]: With dead ends: 114 [2021-12-18 19:51:04,774 INFO L226 Difference]: Without dead ends: 114 [2021-12-18 19:51:04,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2435 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2186, Invalid=9586, Unknown=0, NotChecked=0, Total=11772 [2021-12-18 19:51:04,775 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 561 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:51:04,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 447 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 19:51:04,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-18 19:51:04,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2021-12-18 19:51:04,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 111 states have internal predecessors, (113), 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) [2021-12-18 19:51:04,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2021-12-18 19:51:04,778 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 106 [2021-12-18 19:51:04,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:51:04,779 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2021-12-18 19:51:04,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 3.8271604938271606) internal successors, (310), 82 states have internal predecessors, (310), 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) [2021-12-18 19:51:04,779 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2021-12-18 19:51:04,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-18 19:51:04,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:51:04,780 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:51:04,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-18 19:51:04,997 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,SelfDestructingSolverStorable40 [2021-12-18 19:51:04,998 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:51:04,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:51:04,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1637661951, now seen corresponding path program 17 times [2021-12-18 19:51:04,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:51:04,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089941873] [2021-12-18 19:51:04,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:51:04,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:51:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:51:05,605 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 25 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:05,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:51:05,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089941873] [2021-12-18 19:51:05,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089941873] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:51:05,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108150627] [2021-12-18 19:51:05,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:51:05,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:51:05,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:51:05,608 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) [2021-12-18 19:51:05,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-18 19:51:06,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-12-18 19:51:06,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:51:06,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 138 conjunts are in the unsatisfiable core [2021-12-18 19:51:06,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:51:06,517 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 10 treesize of output 8 [2021-12-18 19:51:07,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:51:07,214 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 17 treesize of output 19 [2021-12-18 19:51:07,260 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 16 treesize of output 18 [2021-12-18 19:51:07,276 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 16 treesize of output 18 [2021-12-18 19:51:07,293 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 16 treesize of output 18 [2021-12-18 19:51:07,309 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 16 treesize of output 18 [2021-12-18 19:51:07,327 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 16 treesize of output 18 [2021-12-18 19:51:07,344 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 16 treesize of output 18 [2021-12-18 19:51:07,360 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 16 treesize of output 18 [2021-12-18 19:51:07,377 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 16 treesize of output 18 [2021-12-18 19:51:07,394 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 16 treesize of output 18 [2021-12-18 19:51:07,411 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 16 treesize of output 18 [2021-12-18 19:51:07,429 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 16 treesize of output 18 [2021-12-18 19:51:07,467 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 [2021-12-18 19:51:07,472 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 25 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:07,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:51:07,506 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1954 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1954) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-18 19:51:07,512 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1954 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1954) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) 0)) is different from false [2021-12-18 19:51:07,522 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1954 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1954) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3)) 0)) is different from false [2021-12-18 19:51:07,531 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1954 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1954) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-18 19:51:07,541 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1954 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1954) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 5)) 0)) is different from false [2021-12-18 19:51:07,550 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1954 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1954) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 6)) 0)) is different from false [2021-12-18 19:51:07,560 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1954 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1954) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 7)) 0)) is different from false [2021-12-18 19:51:07,570 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1954 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1954) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 8)) 0)) is different from false [2021-12-18 19:51:07,580 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1954 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1954) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 9)) 0)) is different from false [2021-12-18 19:51:07,589 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1954 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1954) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 10)) 0)) is different from false [2021-12-18 19:51:07,599 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1954 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1954) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 11)) 0)) is different from false [2021-12-18 19:51:07,609 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1954 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1954) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 12)) 0)) is different from false [2021-12-18 19:51:07,618 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1954 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_1954) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 12)) 0)) is different from false [2021-12-18 19:51:07,622 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:51:07,623 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:51:07,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:51:07,627 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 37 [2021-12-18 19:51:07,629 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 11 treesize of output 7 [2021-12-18 19:51:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 25 proven. 277 refuted. 0 times theorem prover too weak. 0 trivial. 299 not checked. [2021-12-18 19:51:07,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108150627] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:51:07,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:51:07,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 65 [2021-12-18 19:51:07,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852480282] [2021-12-18 19:51:07,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:51:07,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-18 19:51:07,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:51:07,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-18 19:51:07,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2532, Unknown=13, NotChecked=1456, Total=4160 [2021-12-18 19:51:07,956 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 65 states, 65 states have (on average 3.4) internal successors, (221), 65 states have internal predecessors, (221), 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) [2021-12-18 19:51:09,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:51:09,007 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2021-12-18 19:51:09,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-18 19:51:09,008 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.4) internal successors, (221), 65 states have internal predecessors, (221), 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 [2021-12-18 19:51:09,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:51:09,008 INFO L225 Difference]: With dead ends: 172 [2021-12-18 19:51:09,008 INFO L226 Difference]: Without dead ends: 119 [2021-12-18 19:51:09,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 193 SyntacticMatches, 16 SemanticMatches, 78 ConstructedPredicates, 13 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=247, Invalid=4214, Unknown=13, NotChecked=1846, Total=6320 [2021-12-18 19:51:09,009 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 49 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 2684 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 3995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1294 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:51:09,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 1116 Invalid, 3995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2684 Invalid, 0 Unknown, 1294 Unchecked, 0.6s Time] [2021-12-18 19:51:09,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-18 19:51:09,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2021-12-18 19:51:09,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 114 states have (on average 1.0263157894736843) internal successors, (117), 115 states have internal predecessors, (117), 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) [2021-12-18 19:51:09,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2021-12-18 19:51:09,020 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 109 [2021-12-18 19:51:09,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:51:09,021 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2021-12-18 19:51:09,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.4) internal successors, (221), 65 states have internal predecessors, (221), 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) [2021-12-18 19:51:09,021 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2021-12-18 19:51:09,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-18 19:51:09,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:51:09,022 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:51:09,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-18 19:51:09,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:51:09,223 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:51:09,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:51:09,224 INFO L85 PathProgramCache]: Analyzing trace with hash 64398338, now seen corresponding path program 18 times [2021-12-18 19:51:09,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:51:09,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785229828] [2021-12-18 19:51:09,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:51:09,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:51:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:51:09,692 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 231 proven. 419 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:09,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:51:09,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785229828] [2021-12-18 19:51:09,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785229828] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:51:09,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251252287] [2021-12-18 19:51:09,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:51:09,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:51:09,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:51:09,694 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) [2021-12-18 19:51:09,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-18 19:51:17,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-12-18 19:51:17,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:51:17,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-18 19:51:17,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:51:17,493 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:51:17,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:51:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 276 proven. 374 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:18,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:51:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 325 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:19,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251252287] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:51:19,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:51:19,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 88 [2021-12-18 19:51:19,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692185872] [2021-12-18 19:51:19,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:51:19,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-18 19:51:19,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:51:19,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-18 19:51:19,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1113, Invalid=6719, Unknown=0, NotChecked=0, Total=7832 [2021-12-18 19:51:19,431 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 89 states, 88 states have (on average 3.7613636363636362) internal successors, (331), 89 states have internal predecessors, (331), 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) [2021-12-18 19:51:20,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:51:20,188 INFO L93 Difference]: Finished difference Result 123 states and 124 transitions. [2021-12-18 19:51:20,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 19:51:20,188 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 3.7613636363636362) internal successors, (331), 89 states have internal predecessors, (331), 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 [2021-12-18 19:51:20,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:51:20,189 INFO L225 Difference]: With dead ends: 123 [2021-12-18 19:51:20,189 INFO L226 Difference]: Without dead ends: 123 [2021-12-18 19:51:20,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2096, Invalid=8824, Unknown=0, NotChecked=0, Total=10920 [2021-12-18 19:51:20,190 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 542 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:51:20,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 377 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1079 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 19:51:20,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-18 19:51:20,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2021-12-18 19:51:20,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 117 states have (on average 1.0256410256410255) internal successors, (120), 118 states have internal predecessors, (120), 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) [2021-12-18 19:51:20,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2021-12-18 19:51:20,192 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 113 [2021-12-18 19:51:20,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:51:20,192 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2021-12-18 19:51:20,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 88 states have (on average 3.7613636363636362) internal successors, (331), 89 states have internal predecessors, (331), 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) [2021-12-18 19:51:20,192 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2021-12-18 19:51:20,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-18 19:51:20,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:51:20,192 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:51:20,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-18 19:51:20,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:51:20,403 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:51:20,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:51:20,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1996348465, now seen corresponding path program 10 times [2021-12-18 19:51:20,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:51:20,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118107061] [2021-12-18 19:51:20,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:51:20,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:51:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:51:20,812 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 231 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:20,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:51:20,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118107061] [2021-12-18 19:51:20,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118107061] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:51:20,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483627207] [2021-12-18 19:51:20,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:51:20,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:51:20,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:51:20,814 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) [2021-12-18 19:51:20,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-18 19:51:21,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:51:21,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:51:21,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 119 conjunts are in the unsatisfiable core [2021-12-18 19:51:21,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:51:21,047 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 10 treesize of output 8 [2021-12-18 19:51:21,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 19:51:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-18 19:51:22,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:51:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-18 19:51:23,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483627207] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:51:23,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:51:23,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 19, 19] total 65 [2021-12-18 19:51:23,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363532591] [2021-12-18 19:51:23,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:51:23,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-18 19:51:23,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:51:23,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-18 19:51:23,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=3750, Unknown=0, NotChecked=0, Total=4290 [2021-12-18 19:51:23,611 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 66 states, 65 states have (on average 3.6615384615384614) internal successors, (238), 66 states have internal predecessors, (238), 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) [2021-12-18 19:51:28,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:51:28,129 INFO L93 Difference]: Finished difference Result 185 states and 186 transitions. [2021-12-18 19:51:28,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-18 19:51:28,129 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 3.6615384615384614) internal successors, (238), 66 states have internal predecessors, (238), 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 114 [2021-12-18 19:51:28,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:51:28,130 INFO L225 Difference]: With dead ends: 185 [2021-12-18 19:51:28,130 INFO L226 Difference]: Without dead ends: 185 [2021-12-18 19:51:28,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2873 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2770, Invalid=11750, Unknown=0, NotChecked=0, Total=14520 [2021-12-18 19:51:28,131 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 420 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 2607 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 2801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 19:51:28,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 940 Invalid, 2801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2607 Invalid, 0 Unknown, 86 Unchecked, 0.9s Time] [2021-12-18 19:51:28,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-18 19:51:28,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 172. [2021-12-18 19:51:28,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 170 states have (on average 1.0941176470588236) internal successors, (186), 171 states have internal predecessors, (186), 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) [2021-12-18 19:51:28,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 186 transitions. [2021-12-18 19:51:28,133 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 186 transitions. Word has length 114 [2021-12-18 19:51:28,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:51:28,134 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 186 transitions. [2021-12-18 19:51:28,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 3.6615384615384614) internal successors, (238), 66 states have internal predecessors, (238), 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) [2021-12-18 19:51:28,134 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 186 transitions. [2021-12-18 19:51:28,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-18 19:51:28,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:51:28,134 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:51:28,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-18 19:51:28,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:51:28,343 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:51:28,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:51:28,344 INFO L85 PathProgramCache]: Analyzing trace with hash 804967197, now seen corresponding path program 19 times [2021-12-18 19:51:28,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:51:28,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716454823] [2021-12-18 19:51:28,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:51:28,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:51:28,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:51:29,050 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 27 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:29,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:51:29,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716454823] [2021-12-18 19:51:29,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716454823] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:51:29,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341567806] [2021-12-18 19:51:29,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:51:29,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:51:29,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:51:29,052 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) [2021-12-18 19:51:29,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-18 19:51:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:51:29,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 145 conjunts are in the unsatisfiable core [2021-12-18 19:51:29,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:51:29,275 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 10 treesize of output 8 [2021-12-18 19:51:29,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:51:30,071 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 17 treesize of output 19 [2021-12-18 19:51:30,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 19:51:30,134 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 16 treesize of output 18 [2021-12-18 19:51:30,151 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 16 treesize of output 18 [2021-12-18 19:51:30,167 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 16 treesize of output 18 [2021-12-18 19:51:30,183 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 16 treesize of output 18 [2021-12-18 19:51:30,200 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 16 treesize of output 18 [2021-12-18 19:51:30,216 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 16 treesize of output 18 [2021-12-18 19:51:30,233 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 16 treesize of output 18 [2021-12-18 19:51:30,250 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 16 treesize of output 18 [2021-12-18 19:51:30,267 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 16 treesize of output 18 [2021-12-18 19:51:30,285 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 16 treesize of output 18 [2021-12-18 19:51:30,304 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 16 treesize of output 18 [2021-12-18 19:51:30,344 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 [2021-12-18 19:51:30,349 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 27 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:30,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:51:30,383 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2333 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2333) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-18 19:51:30,388 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2333 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2333) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) 0)) is different from false [2021-12-18 19:51:30,398 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2333 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2333) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3)) 0)) is different from false [2021-12-18 19:51:30,408 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2333 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2333) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-18 19:51:30,417 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2333 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2333) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 5)) 0)) is different from false [2021-12-18 19:51:30,427 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2333 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2333) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 6)) 0)) is different from false [2021-12-18 19:51:30,437 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2333 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2333) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 7)) 0)) is different from false [2021-12-18 19:51:30,447 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2333 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2333) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 8)) 0)) is different from false [2021-12-18 19:51:30,456 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2333 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2333) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 9)) 0)) is different from false [2021-12-18 19:51:30,467 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2333 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2333) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 10)) 0)) is different from false [2021-12-18 19:51:30,478 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2333 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2333) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 11)) 0)) is different from false [2021-12-18 19:51:30,490 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2333 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2333) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 12)) 0)) is different from false [2021-12-18 19:51:30,500 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2333 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2333) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 13)) 0)) is different from false [2021-12-18 19:51:30,510 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2333 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_2333) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 13)) 0)) is different from false [2021-12-18 19:51:30,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:51:30,515 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:51:30,519 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:51:30,519 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 37 [2021-12-18 19:51:30,522 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 11 treesize of output 7 [2021-12-18 19:51:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 27 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 350 not checked. [2021-12-18 19:51:30,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341567806] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:51:30,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:51:30,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 69 [2021-12-18 19:51:30,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010781481] [2021-12-18 19:51:30,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:51:30,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-18 19:51:30,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:51:30,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-18 19:51:30,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2844, Unknown=14, NotChecked=1666, Total=4692 [2021-12-18 19:51:30,874 INFO L87 Difference]: Start difference. First operand 172 states and 186 transitions. Second operand has 69 states, 69 states have (on average 3.4347826086956523) internal successors, (237), 69 states have internal predecessors, (237), 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) [2021-12-18 19:51:32,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:51:32,191 INFO L93 Difference]: Finished difference Result 236 states and 250 transitions. [2021-12-18 19:51:32,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-18 19:51:32,192 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.4347826086956523) internal successors, (237), 69 states have internal predecessors, (237), 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 117 [2021-12-18 19:51:32,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:51:32,192 INFO L225 Difference]: With dead ends: 236 [2021-12-18 19:51:32,193 INFO L226 Difference]: Without dead ends: 179 [2021-12-18 19:51:32,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 208 SyntacticMatches, 17 SemanticMatches, 83 ConstructedPredicates, 14 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=261, Invalid=4751, Unknown=14, NotChecked=2114, Total=7140 [2021-12-18 19:51:32,193 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 50 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 2708 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 4405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1679 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:51:32,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1107 Invalid, 4405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2708 Invalid, 0 Unknown, 1679 Unchecked, 0.7s Time] [2021-12-18 19:51:32,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-18 19:51:32,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 176. [2021-12-18 19:51:32,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 174 states have (on average 1.0919540229885059) internal successors, (190), 175 states have internal predecessors, (190), 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) [2021-12-18 19:51:32,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 190 transitions. [2021-12-18 19:51:32,197 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 190 transitions. Word has length 117 [2021-12-18 19:51:32,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:51:32,198 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 190 transitions. [2021-12-18 19:51:32,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.4347826086956523) internal successors, (237), 69 states have internal predecessors, (237), 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) [2021-12-18 19:51:32,199 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 190 transitions. [2021-12-18 19:51:32,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-18 19:51:32,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:51:32,199 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:51:32,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-18 19:51:32,402 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,SelfDestructingSolverStorable44 [2021-12-18 19:51:32,402 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:51:32,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:51:32,403 INFO L85 PathProgramCache]: Analyzing trace with hash 103483168, now seen corresponding path program 20 times [2021-12-18 19:51:32,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:51:32,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753229085] [2021-12-18 19:51:32,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:51:32,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:51:32,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:51:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 276 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:32,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:51:32,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753229085] [2021-12-18 19:51:32,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753229085] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:51:32,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878404707] [2021-12-18 19:51:32,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:51:32,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:51:32,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:51:32,906 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) [2021-12-18 19:51:32,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-18 19:51:33,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:51:33,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:51:33,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-18 19:51:33,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:51:33,144 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:51:33,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:51:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 325 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:34,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:51:35,159 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 378 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:35,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878404707] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:51:35,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:51:35,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 93 [2021-12-18 19:51:35,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946926705] [2021-12-18 19:51:35,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:51:35,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-12-18 19:51:35,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:51:35,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-12-18 19:51:35,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1065, Invalid=7677, Unknown=0, NotChecked=0, Total=8742 [2021-12-18 19:51:35,165 INFO L87 Difference]: Start difference. First operand 176 states and 190 transitions. Second operand has 94 states, 93 states have (on average 3.795698924731183) internal successors, (353), 94 states have internal predecessors, (353), 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) [2021-12-18 19:51:35,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:51:35,921 INFO L93 Difference]: Finished difference Result 176 states and 189 transitions. [2021-12-18 19:51:35,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-18 19:51:35,921 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 3.795698924731183) internal successors, (353), 94 states have internal predecessors, (353), 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 121 [2021-12-18 19:51:35,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:51:35,922 INFO L225 Difference]: With dead ends: 176 [2021-12-18 19:51:35,922 INFO L226 Difference]: Without dead ends: 176 [2021-12-18 19:51:35,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3944 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2047, Invalid=10163, Unknown=0, NotChecked=0, Total=12210 [2021-12-18 19:51:35,923 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 537 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 2242 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 2407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 2242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:51:35,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 784 Invalid, 2407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 2242 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 19:51:35,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-18 19:51:35,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2021-12-18 19:51:35,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 174 states have (on average 1.0862068965517242) internal successors, (189), 175 states have internal predecessors, (189), 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) [2021-12-18 19:51:35,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 189 transitions. [2021-12-18 19:51:35,926 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 189 transitions. Word has length 121 [2021-12-18 19:51:35,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:51:35,926 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 189 transitions. [2021-12-18 19:51:35,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 3.795698924731183) internal successors, (353), 94 states have internal predecessors, (353), 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) [2021-12-18 19:51:35,926 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 189 transitions. [2021-12-18 19:51:35,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-18 19:51:35,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:51:35,927 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:51:35,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-18 19:51:36,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:51:36,144 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:51:36,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:51:36,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1561098043, now seen corresponding path program 21 times [2021-12-18 19:51:36,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:51:36,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43531805] [2021-12-18 19:51:36,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:51:36,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:51:36,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:51:36,918 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 29 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:36,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:51:36,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43531805] [2021-12-18 19:51:36,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43531805] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:51:36,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327512266] [2021-12-18 19:51:36,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:51:36,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:51:36,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:51:36,920 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) [2021-12-18 19:51:36,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-18 19:51:42,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-12-18 19:51:42,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:51:42,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 198 conjunts are in the unsatisfiable core [2021-12-18 19:51:42,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:51:42,981 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 10 treesize of output 8 [2021-12-18 19:51:43,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:51:44,127 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 16 treesize of output 18 [2021-12-18 19:51:44,223 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 16 treesize of output 18 [2021-12-18 19:51:44,320 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 16 treesize of output 18 [2021-12-18 19:51:44,417 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 16 treesize of output 18 [2021-12-18 19:51:44,515 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 16 treesize of output 18 [2021-12-18 19:51:44,613 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 16 treesize of output 18 [2021-12-18 19:51:44,711 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 16 treesize of output 18 [2021-12-18 19:51:44,814 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 16 treesize of output 18 [2021-12-18 19:51:44,917 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 16 treesize of output 18 [2021-12-18 19:51:45,020 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 16 treesize of output 18 [2021-12-18 19:51:45,186 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 16 treesize of output 18 [2021-12-18 19:51:45,333 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 16 treesize of output 18 [2021-12-18 19:51:45,409 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 16 treesize of output 18 [2021-12-18 19:51:45,506 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 16 treesize of output 18 [2021-12-18 19:51:45,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:51:45,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:51:45,589 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 17 treesize of output 10 [2021-12-18 19:51:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 29 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:45,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:51:45,669 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2608 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2608) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-18 19:51:45,676 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2608 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2608) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) 0)) is different from false [2021-12-18 19:51:45,686 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2608 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2608) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3)) 0)) is different from false [2021-12-18 19:51:45,696 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2608 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2608) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-18 19:51:45,706 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2608 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2608) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 5)) 0)) is different from false [2021-12-18 19:51:45,716 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2608 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2608) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 6)) 0)) is different from false [2021-12-18 19:51:45,726 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2608 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2608) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 7)) 0)) is different from false [2021-12-18 19:51:45,737 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2608 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2608) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 8)) 0)) is different from false [2021-12-18 19:51:45,747 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2608 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2608) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 9)) 0)) is different from false [2021-12-18 19:51:45,757 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2608 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2608) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 10)) 0)) is different from false [2021-12-18 19:51:45,767 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2608 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2608) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 11)) 0)) is different from false [2021-12-18 19:51:45,778 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2608 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2608) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 12)) 0)) is different from false [2021-12-18 19:51:45,788 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2608 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2608) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 13)) 0)) is different from false [2021-12-18 19:51:45,798 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2608 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2608) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 14)) 0)) is different from false [2021-12-18 19:51:45,810 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2608 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_2608) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 14)) 0)) is different from false [2021-12-18 19:51:45,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:51:45,815 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:51:45,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:51:45,820 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 37 [2021-12-18 19:51:45,823 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 11 treesize of output 7 [2021-12-18 19:51:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 29 proven. 379 refuted. 0 times theorem prover too weak. 0 trivial. 405 not checked. [2021-12-18 19:51:46,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327512266] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:51:46,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:51:46,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 37] total 102 [2021-12-18 19:51:46,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406700500] [2021-12-18 19:51:46,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:51:46,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-12-18 19:51:46,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:51:46,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-12-18 19:51:46,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=7242, Unknown=15, NotChecked=2760, Total=10302 [2021-12-18 19:51:46,789 INFO L87 Difference]: Start difference. First operand 176 states and 189 transitions. Second operand has 102 states, 102 states have (on average 3.5098039215686274) internal successors, (358), 102 states have internal predecessors, (358), 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) [2021-12-18 19:51:48,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:51:48,198 INFO L93 Difference]: Finished difference Result 244 states and 257 transitions. [2021-12-18 19:51:48,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-18 19:51:48,199 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.5098039215686274) internal successors, (358), 102 states have internal predecessors, (358), 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 [2021-12-18 19:51:48,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:51:48,200 INFO L225 Difference]: With dead ends: 244 [2021-12-18 19:51:48,200 INFO L226 Difference]: Without dead ends: 183 [2021-12-18 19:51:48,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 195 SyntacticMatches, 5 SemanticMatches, 127 ConstructedPredicates, 15 IntricatePredicates, 12 DeprecatedPredicates, 2833 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=445, Invalid=12482, Unknown=15, NotChecked=3570, Total=16512 [2021-12-18 19:51:48,201 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 51 mSDsluCounter, 1706 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1741 SdHoareTripleChecker+Invalid, 3133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1483 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:51:48,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 1741 Invalid, 3133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1633 Invalid, 0 Unknown, 1483 Unchecked, 0.4s Time] [2021-12-18 19:51:48,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-18 19:51:48,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2021-12-18 19:51:48,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 178 states have (on average 1.0842696629213484) internal successors, (193), 179 states have internal predecessors, (193), 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) [2021-12-18 19:51:48,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 193 transitions. [2021-12-18 19:51:48,204 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 193 transitions. Word has length 125 [2021-12-18 19:51:48,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:51:48,204 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 193 transitions. [2021-12-18 19:51:48,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.5098039215686274) internal successors, (358), 102 states have internal predecessors, (358), 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) [2021-12-18 19:51:48,205 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 193 transitions. [2021-12-18 19:51:48,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-18 19:51:48,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:51:48,205 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:51:48,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-18 19:51:48,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:51:48,426 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:51:48,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:51:48,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1500121026, now seen corresponding path program 22 times [2021-12-18 19:51:48,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:51:48,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685229198] [2021-12-18 19:51:48,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:51:48,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:51:48,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:51:48,977 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 325 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:48,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:51:48,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685229198] [2021-12-18 19:51:48,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685229198] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:51:48,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31196194] [2021-12-18 19:51:48,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:51:48,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:51:48,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:51:48,978 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) [2021-12-18 19:51:48,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-18 19:51:49,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:51:49,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:51:49,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 152 conjunts are in the unsatisfiable core [2021-12-18 19:51:49,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:51:49,216 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:51:49,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:51:49,222 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 10 treesize of output 8 [2021-12-18 19:51:50,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-12-18 19:51:50,278 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 18 treesize of output 20 [2021-12-18 19:51:50,378 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 18 treesize of output 20 [2021-12-18 19:51:50,458 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 18 treesize of output 20 [2021-12-18 19:51:50,536 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 18 treesize of output 20 [2021-12-18 19:51:50,617 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 18 treesize of output 20 [2021-12-18 19:51:50,695 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 18 treesize of output 20 [2021-12-18 19:51:50,779 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 18 treesize of output 20 [2021-12-18 19:51:50,874 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 18 treesize of output 20 [2021-12-18 19:51:50,963 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 18 treesize of output 20 [2021-12-18 19:51:51,052 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 18 treesize of output 20 [2021-12-18 19:51:51,194 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 18 treesize of output 20 [2021-12-18 19:51:51,286 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 18 treesize of output 20 [2021-12-18 19:51:51,388 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 18 treesize of output 20 [2021-12-18 19:51:51,483 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 18 treesize of output 20 [2021-12-18 19:51:51,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:51:51,610 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 19 treesize of output 19 [2021-12-18 19:51:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 392 proven. 478 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:51,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:51:53,356 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2763 (Array Int Int)) (|v_ULTIMATE.start_cstrcpy_~from#1.offset_505| Int)) (or (<= (+ |v_ULTIMATE.start_cstrcpy_~from#1.offset_505| 16) (select |c_#length| |c_ULTIMATE.start_main_~nondetString~0#1.base|)) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_2763) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |v_ULTIMATE.start_cstrcpy_~from#1.offset_505| 14))) (< |c_ULTIMATE.start_main_~nondetString~0#1.offset| |v_ULTIMATE.start_cstrcpy_~from#1.offset_505|) (< |v_ULTIMATE.start_cstrcpy_~from#1.offset_505| 0))) is different from false [2021-12-18 19:51:53,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:51:53,364 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:51:53,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:51:53,369 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 37 [2021-12-18 19:51:53,372 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 11 treesize of output 7 [2021-12-18 19:51:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 435 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:55,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31196194] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:51:55,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:51:55,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 38, 38] total 107 [2021-12-18 19:51:55,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589349409] [2021-12-18 19:51:55,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:51:55,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-12-18 19:51:55,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:51:55,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-12-18 19:51:55,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1167, Invalid=10178, Unknown=1, NotChecked=210, Total=11556 [2021-12-18 19:51:55,658 INFO L87 Difference]: Start difference. First operand 180 states and 193 transitions. Second operand has 108 states, 107 states have (on average 3.542056074766355) internal successors, (379), 108 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) [2021-12-18 19:51:57,208 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3)) (.cse0 (select |c_#length| |c_ULTIMATE.start_cstrcpy_~from#1.base|)) (.cse2 (select |c_#length| |c_ULTIMATE.start_main_~nondetString~0#1.base|))) (and (<= 13 |c_ULTIMATE.start_cstrcpy_~from#1.offset|) (<= 15 .cse0) (or (and (<= (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 4) .cse0) (<= 0 .cse1)) (forall ((v_ArrVal_2763 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2763) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2))))) (= |c_ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 15) .cse2) (<= |c_ULTIMATE.start_cstrcpy_~from#1.offset| 13) (not (= |c_ULTIMATE.start_main_~nondetString~0#1.base| |c_ULTIMATE.start_main_~nondetArea~0#1.base|)) (= 0 |c_ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 14 |c_ULTIMATE.start_main_~i~0#1|) (<= .cse1 .cse0) (= .cse2 |c_ULTIMATE.start_main_~length2~0#1|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ .cse0 (- 1))) 0) (<= 16 .cse2))) is different from false [2021-12-18 19:51:57,210 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3)) (.cse0 (select |c_#length| |c_ULTIMATE.start_cstrcpy_~from#1.base|))) (and (<= |c_ULTIMATE.start_cstrcpy_~from#1.offset| 13) (<= 13 |c_ULTIMATE.start_cstrcpy_~from#1.offset|) (<= 15 .cse0) (<= .cse1 .cse0) (or (and (<= (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 4) .cse0) (<= 0 .cse1)) (forall ((v_ArrVal_2763 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_2763) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2))))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ .cse0 (- 1))) 0))) is different from false [2021-12-18 19:51:57,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:51:57,555 INFO L93 Difference]: Finished difference Result 180 states and 191 transitions. [2021-12-18 19:51:57,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-18 19:51:57,555 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 107 states have (on average 3.542056074766355) internal successors, (379), 108 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 [2021-12-18 19:51:57,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:51:57,556 INFO L225 Difference]: With dead ends: 180 [2021-12-18 19:51:57,556 INFO L226 Difference]: Without dead ends: 180 [2021-12-18 19:51:57,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 200 SyntacticMatches, 5 SemanticMatches, 134 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 3324 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2461, Invalid=15089, Unknown=18, NotChecked=792, Total=18360 [2021-12-18 19:51:57,557 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 283 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 2199 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 3435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 2199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1014 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:51:57,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 1112 Invalid, 3435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 2199 Invalid, 0 Unknown, 1014 Unchecked, 0.6s Time] [2021-12-18 19:51:57,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-18 19:51:57,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2021-12-18 19:51:57,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 178 states have (on average 1.0730337078651686) internal successors, (191), 179 states have internal predecessors, (191), 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) [2021-12-18 19:51:57,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 191 transitions. [2021-12-18 19:51:57,560 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 191 transitions. Word has length 129 [2021-12-18 19:51:57,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:51:57,560 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 191 transitions. [2021-12-18 19:51:57,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 107 states have (on average 3.542056074766355) internal successors, (379), 108 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) [2021-12-18 19:51:57,561 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 191 transitions. [2021-12-18 19:51:57,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-18 19:51:57,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:51:57,561 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:51:57,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-18 19:51:57,779 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,SelfDestructingSolverStorable47 [2021-12-18 19:51:57,779 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:51:57,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:51:57,780 INFO L85 PathProgramCache]: Analyzing trace with hash -366914316, now seen corresponding path program 23 times [2021-12-18 19:51:57,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:51:57,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393811892] [2021-12-18 19:51:57,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:51:57,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:51:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:51:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 500 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:58,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:51:58,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393811892] [2021-12-18 19:51:58,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393811892] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:51:58,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137020040] [2021-12-18 19:51:58,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:51:58,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:51:58,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:51:58,309 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) [2021-12-18 19:51:58,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-18 19:51:59,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-12-18 19:51:59,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:51:59,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-18 19:51:59,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:51:59,694 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:51:59,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:52:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 341 proven. 655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:52:00,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:52:01,688 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 561 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:52:01,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137020040] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:52:01,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:52:01,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 88 [2021-12-18 19:52:01,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406875454] [2021-12-18 19:52:01,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:52:01,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-12-18 19:52:01,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:52:01,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-12-18 19:52:01,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1213, Invalid=6443, Unknown=0, NotChecked=0, Total=7656 [2021-12-18 19:52:01,692 INFO L87 Difference]: Start difference. First operand 180 states and 191 transitions. Second operand has 88 states, 88 states have (on average 3.7954545454545454) internal successors, (334), 88 states have internal predecessors, (334), 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) [2021-12-18 19:52:02,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:52:02,729 INFO L93 Difference]: Finished difference Result 254 states and 265 transitions. [2021-12-18 19:52:02,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-18 19:52:02,729 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.7954545454545454) internal successors, (334), 88 states have internal predecessors, (334), 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 137 [2021-12-18 19:52:02,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:52:02,737 INFO L225 Difference]: With dead ends: 254 [2021-12-18 19:52:02,737 INFO L226 Difference]: Without dead ends: 187 [2021-12-18 19:52:02,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 221 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3687 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2529, Invalid=12233, Unknown=0, NotChecked=0, Total=14762 [2021-12-18 19:52:02,739 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 248 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:52:02,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 416 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:52:02,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-18 19:52:02,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2021-12-18 19:52:02,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 182 states have (on average 1.0714285714285714) internal successors, (195), 183 states have internal predecessors, (195), 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) [2021-12-18 19:52:02,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 195 transitions. [2021-12-18 19:52:02,753 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 195 transitions. Word has length 137 [2021-12-18 19:52:02,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:52:02,754 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 195 transitions. [2021-12-18 19:52:02,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.7954545454545454) internal successors, (334), 88 states have internal predecessors, (334), 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) [2021-12-18 19:52:02,754 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 195 transitions. [2021-12-18 19:52:02,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-18 19:52:02,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:52:02,755 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:52:02,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-12-18 19:52:02,974 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,SelfDestructingSolverStorable48 [2021-12-18 19:52:02,975 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:52:02,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:52:02,975 INFO L85 PathProgramCache]: Analyzing trace with hash -366217, now seen corresponding path program 24 times [2021-12-18 19:52:02,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:52:02,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449724201] [2021-12-18 19:52:02,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:52:02,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:52:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:52:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 33 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:52:03,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:52:03,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449724201] [2021-12-18 19:52:03,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449724201] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:52:03,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219050624] [2021-12-18 19:52:03,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:52:03,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:52:03,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:52:03,862 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) [2021-12-18 19:52:03,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-18 19:52:17,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-12-18 19:52:17,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:52:17,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 174 conjunts are in the unsatisfiable core [2021-12-18 19:52:17,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:52:17,397 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 10 treesize of output 8 [2021-12-18 19:52:18,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:52:18,319 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 17 treesize of output 19 [2021-12-18 19:52:18,356 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 16 treesize of output 18 [2021-12-18 19:52:18,380 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 16 treesize of output 18 [2021-12-18 19:52:18,392 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 16 treesize of output 18 [2021-12-18 19:52:18,403 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 16 treesize of output 18 [2021-12-18 19:52:18,416 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 16 treesize of output 18 [2021-12-18 19:52:18,428 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 16 treesize of output 18 [2021-12-18 19:52:18,440 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 16 treesize of output 18 [2021-12-18 19:52:18,452 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 16 treesize of output 18 [2021-12-18 19:52:18,465 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 16 treesize of output 18 [2021-12-18 19:52:18,477 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 16 treesize of output 18 [2021-12-18 19:52:18,490 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 16 treesize of output 18 [2021-12-18 19:52:18,502 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 16 treesize of output 18 [2021-12-18 19:52:18,518 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 16 treesize of output 18 [2021-12-18 19:52:18,533 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 16 treesize of output 18 [2021-12-18 19:52:18,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 19:52:18,555 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 [2021-12-18 19:52:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 33 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:52:18,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:52:18,611 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3072 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3072) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-18 19:52:18,616 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3072 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3072) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) 0)) is different from false [2021-12-18 19:52:18,623 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3072 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3072) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3)) 0)) is different from false [2021-12-18 19:52:18,630 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3072 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3072) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-18 19:52:18,637 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3072 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3072) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 5)) 0)) is different from false [2021-12-18 19:52:18,644 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3072 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3072) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 6)) 0)) is different from false [2021-12-18 19:52:18,652 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3072 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3072) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 7)) 0)) is different from false [2021-12-18 19:52:18,660 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3072 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3072) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 8)) 0)) is different from false [2021-12-18 19:52:18,669 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3072 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3072) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 9)) 0)) is different from false [2021-12-18 19:52:18,676 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3072 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3072) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 10)) 0)) is different from false [2021-12-18 19:52:18,683 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3072 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3072) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 11)) 0)) is different from false [2021-12-18 19:52:18,690 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3072 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3072) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 12)) 0)) is different from false [2021-12-18 19:52:18,725 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3072 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3072) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 13)) 0)) is different from false [2021-12-18 19:52:18,748 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3072 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3072) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 14)) 0)) is different from false [2021-12-18 19:52:18,755 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3072 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3072) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 15)) 0)) is different from false [2021-12-18 19:52:18,761 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3072 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3072) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 16)) 0)) is different from false [2021-12-18 19:52:18,768 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3072 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_3072) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 16)) 0)) is different from false [2021-12-18 19:52:18,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:52:18,774 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:52:18,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:52:18,777 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 37 [2021-12-18 19:52:18,779 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 11 treesize of output 7 [2021-12-18 19:52:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 33 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 527 not checked. [2021-12-18 19:52:19,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219050624] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:52:19,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:52:19,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 41] total 81 [2021-12-18 19:52:19,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363012567] [2021-12-18 19:52:19,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:52:19,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-18 19:52:19,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:52:19,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-18 19:52:19,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=3888, Unknown=17, NotChecked=2380, Total=6480 [2021-12-18 19:52:19,034 INFO L87 Difference]: Start difference. First operand 184 states and 195 transitions. Second operand has 81 states, 81 states have (on average 3.506172839506173) internal successors, (284), 81 states have internal predecessors, (284), 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) [2021-12-18 19:52:21,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:52:21,296 INFO L93 Difference]: Finished difference Result 260 states and 271 transitions. [2021-12-18 19:52:21,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-18 19:52:21,296 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.506172839506173) internal successors, (284), 81 states have internal predecessors, (284), 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 141 [2021-12-18 19:52:21,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:52:21,297 INFO L225 Difference]: With dead ends: 260 [2021-12-18 19:52:21,297 INFO L226 Difference]: Without dead ends: 191 [2021-12-18 19:52:21,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 252 SyntacticMatches, 21 SemanticMatches, 98 ConstructedPredicates, 17 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=303, Invalid=6554, Unknown=17, NotChecked=3026, Total=9900 [2021-12-18 19:52:21,298 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 46 mSDsluCounter, 1720 mSDsCounter, 0 mSdLazyCounter, 4433 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 6743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 4433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2290 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:52:21,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 1759 Invalid, 6743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 4433 Invalid, 0 Unknown, 2290 Unchecked, 1.3s Time] [2021-12-18 19:52:21,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-18 19:52:21,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2021-12-18 19:52:21,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.0698924731182795) internal successors, (199), 187 states have internal predecessors, (199), 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) [2021-12-18 19:52:21,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 199 transitions. [2021-12-18 19:52:21,301 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 199 transitions. Word has length 141 [2021-12-18 19:52:21,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:52:21,301 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 199 transitions. [2021-12-18 19:52:21,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.506172839506173) internal successors, (284), 81 states have internal predecessors, (284), 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) [2021-12-18 19:52:21,301 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 199 transitions. [2021-12-18 19:52:21,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-18 19:52:21,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:52:21,302 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:52:21,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-12-18 19:52:21,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-18 19:52:21,525 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:52:21,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:52:21,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1570798470, now seen corresponding path program 25 times [2021-12-18 19:52:21,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:52:21,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173887195] [2021-12-18 19:52:21,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:52:21,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:52:21,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:52:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 435 proven. 687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:52:22,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:52:22,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173887195] [2021-12-18 19:52:22,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173887195] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:52:22,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875827088] [2021-12-18 19:52:22,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:52:22,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:52:22,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:52:22,172 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) [2021-12-18 19:52:22,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-18 19:52:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:52:22,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-18 19:52:22,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:52:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 496 proven. 626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:52:23,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:52:23,779 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 5 treesize of output 3 [2021-12-18 19:52:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 496 proven. 626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:52:23,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875827088] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:52:23,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:52:23,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39, 39] total 79 [2021-12-18 19:52:23,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037420902] [2021-12-18 19:52:23,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:52:23,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-18 19:52:23,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:52:23,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-18 19:52:23,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=5550, Unknown=0, NotChecked=0, Total=6320 [2021-12-18 19:52:23,855 INFO L87 Difference]: Start difference. First operand 188 states and 199 transitions. Second operand has 80 states, 79 states have (on average 3.6962025316455698) internal successors, (292), 80 states have internal predecessors, (292), 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) [2021-12-18 19:52:24,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:52:24,737 INFO L93 Difference]: Finished difference Result 188 states and 198 transitions. [2021-12-18 19:52:24,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-18 19:52:24,737 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 3.6962025316455698) internal successors, (292), 80 states have internal predecessors, (292), 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 145 [2021-12-18 19:52:24,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:52:24,738 INFO L225 Difference]: With dead ends: 188 [2021-12-18 19:52:24,738 INFO L226 Difference]: Without dead ends: 188 [2021-12-18 19:52:24,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 245 SyntacticMatches, 3 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2644 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1800, Invalid=8100, Unknown=0, NotChecked=0, Total=9900 [2021-12-18 19:52:24,741 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 444 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 2628 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 2752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 2628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:52:24,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 927 Invalid, 2752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 2628 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 19:52:24,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-18 19:52:24,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2021-12-18 19:52:24,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.064516129032258) internal successors, (198), 187 states have internal predecessors, (198), 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) [2021-12-18 19:52:24,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 198 transitions. [2021-12-18 19:52:24,752 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 198 transitions. Word has length 145 [2021-12-18 19:52:24,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:52:24,753 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 198 transitions. [2021-12-18 19:52:24,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 3.6962025316455698) internal successors, (292), 80 states have internal predecessors, (292), 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) [2021-12-18 19:52:24,753 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 198 transitions. [2021-12-18 19:52:24,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-18 19:52:24,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:52:24,754 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:52:24,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-12-18 19:52:24,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:52:24,967 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:52:24,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:52:24,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1515276395, now seen corresponding path program 26 times [2021-12-18 19:52:24,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:52:24,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225008340] [2021-12-18 19:52:24,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:52:24,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:52:25,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:52:25,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 35 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:52:25,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:52:25,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225008340] [2021-12-18 19:52:25,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225008340] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:52:25,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023433583] [2021-12-18 19:52:25,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:52:25,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:52:25,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:52:25,985 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) [2021-12-18 19:52:25,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-18 19:52:26,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:52:26,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:52:26,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 170 conjunts are in the unsatisfiable core [2021-12-18 19:52:26,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:52:26,252 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 10 treesize of output 8 [2021-12-18 19:52:26,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 19:52:27,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:52:27,789 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 17 treesize of output 19 [2021-12-18 19:52:27,944 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 17 treesize of output 19 [2021-12-18 19:52:28,167 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 17 treesize of output 19 [2021-12-18 19:52:28,396 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 17 treesize of output 19 [2021-12-18 19:52:28,565 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 17 treesize of output 19 [2021-12-18 19:52:28,736 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 17 treesize of output 19 [2021-12-18 19:52:28,997 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 17 treesize of output 19 [2021-12-18 19:52:29,162 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 17 treesize of output 19 [2021-12-18 19:52:29,402 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 17 treesize of output 19 [2021-12-18 19:52:29,576 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 17 treesize of output 19 [2021-12-18 19:52:29,754 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 17 treesize of output 19 [2021-12-18 19:52:30,008 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 17 treesize of output 19 [2021-12-18 19:52:30,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:52:30,467 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 17 treesize of output 19 [2021-12-18 19:52:30,624 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 17 treesize of output 19 [2021-12-18 19:52:30,860 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 17 treesize of output 19 [2021-12-18 19:52:31,035 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 17 treesize of output 19 [2021-12-18 19:52:31,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:52:31,253 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 18 treesize of output 18 [2021-12-18 19:52:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 496 proven. 695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:52:31,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:52:33,465 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcpy_~from#1.offset_645| Int) (v_ArrVal_3398 (Array Int Int))) (or (< |v_ULTIMATE.start_cstrcpy_~from#1.offset_645| 0) (<= (+ |v_ULTIMATE.start_cstrcpy_~from#1.offset_645| 19) (select |c_#length| |c_ULTIMATE.start_main_~nondetString~0#1.base|)) (< |c_ULTIMATE.start_main_~nondetString~0#1.offset| |v_ULTIMATE.start_cstrcpy_~from#1.offset_645|) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_3398) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |v_ULTIMATE.start_cstrcpy_~from#1.offset_645| 17))))) is different from false [2021-12-18 19:52:33,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:52:33,479 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:52:33,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:52:33,484 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 37 [2021-12-18 19:52:33,488 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 11 treesize of output 7 [2021-12-18 19:52:36,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 561 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:52:36,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023433583] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:52:36,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:52:36,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43, 43] total 126 [2021-12-18 19:52:36,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422292874] [2021-12-18 19:52:36,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:52:36,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2021-12-18 19:52:36,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:52:36,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-12-18 19:52:36,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1010, Invalid=14493, Unknown=1, NotChecked=246, Total=15750 [2021-12-18 19:52:36,851 INFO L87 Difference]: Start difference. First operand 188 states and 198 transitions. Second operand has 126 states, 126 states have (on average 3.484126984126984) internal successors, (439), 126 states have internal predecessors, (439), 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) [2021-12-18 19:52:40,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:52:40,405 INFO L93 Difference]: Finished difference Result 268 states and 277 transitions. [2021-12-18 19:52:40,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-18 19:52:40,406 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 3.484126984126984) internal successors, (439), 126 states have internal predecessors, (439), 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 149 [2021-12-18 19:52:40,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:52:40,407 INFO L225 Difference]: With dead ends: 268 [2021-12-18 19:52:40,407 INFO L226 Difference]: Without dead ends: 195 [2021-12-18 19:52:40,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 272 SyntacticMatches, 11 SemanticMatches, 166 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3852 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1938, Invalid=25787, Unknown=1, NotChecked=330, Total=28056 [2021-12-18 19:52:40,408 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 207 mSDsluCounter, 2210 mSDsCounter, 0 mSdLazyCounter, 2112 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 2252 SdHoareTripleChecker+Invalid, 3673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1538 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:52:40,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 2252 Invalid, 3673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2112 Invalid, 0 Unknown, 1538 Unchecked, 0.7s Time] [2021-12-18 19:52:40,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-18 19:52:40,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2021-12-18 19:52:40,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 190 states have (on average 1.0578947368421052) internal successors, (201), 191 states have internal predecessors, (201), 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) [2021-12-18 19:52:40,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 201 transitions. [2021-12-18 19:52:40,411 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 201 transitions. Word has length 149 [2021-12-18 19:52:40,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:52:40,411 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 201 transitions. [2021-12-18 19:52:40,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 3.484126984126984) internal successors, (439), 126 states have internal predecessors, (439), 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) [2021-12-18 19:52:40,411 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 201 transitions. [2021-12-18 19:52:40,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-18 19:52:40,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:52:40,412 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:52:40,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-12-18 19:52:40,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:52:40,629 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:52:40,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:52:40,630 INFO L85 PathProgramCache]: Analyzing trace with hash 164008883, now seen corresponding path program 27 times [2021-12-18 19:52:40,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:52:40,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949771463] [2021-12-18 19:52:40,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:52:40,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:52:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:52:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 37 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:52:41,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:52:41,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949771463] [2021-12-18 19:52:41,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949771463] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:52:41,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091552654] [2021-12-18 19:52:41,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:52:41,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:52:41,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:52:41,736 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) [2021-12-18 19:52:41,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-18 19:52:56,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-12-18 19:52:56,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:52:56,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 190 conjunts are in the unsatisfiable core [2021-12-18 19:52:56,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:52:56,511 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 10 treesize of output 8 [2021-12-18 19:52:57,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:52:57,291 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 17 treesize of output 19 [2021-12-18 19:52:57,326 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 16 treesize of output 18 [2021-12-18 19:52:57,336 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 16 treesize of output 18 [2021-12-18 19:52:57,345 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 16 treesize of output 18 [2021-12-18 19:52:57,355 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 16 treesize of output 18 [2021-12-18 19:52:57,379 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 16 treesize of output 18 [2021-12-18 19:52:57,389 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 16 treesize of output 18 [2021-12-18 19:52:57,399 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 16 treesize of output 18 [2021-12-18 19:52:57,409 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 16 treesize of output 18 [2021-12-18 19:52:57,419 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 16 treesize of output 18 [2021-12-18 19:52:57,429 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 16 treesize of output 18 [2021-12-18 19:52:57,439 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 16 treesize of output 18 [2021-12-18 19:52:57,450 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 16 treesize of output 18 [2021-12-18 19:52:57,465 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 16 treesize of output 18 [2021-12-18 19:52:57,476 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 16 treesize of output 18 [2021-12-18 19:52:57,486 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 16 treesize of output 18 [2021-12-18 19:52:57,496 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 16 treesize of output 18 [2021-12-18 19:52:57,518 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 16 treesize of output 18 [2021-12-18 19:52:57,549 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 [2021-12-18 19:52:57,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 37 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:52:57,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:52:57,579 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3581 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3581) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-18 19:52:57,588 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3581 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3581) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) 0)) is different from false [2021-12-18 19:52:57,594 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3581 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3581) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3)) 0)) is different from false [2021-12-18 19:52:57,600 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3581 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3581) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-18 19:52:57,606 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3581 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3581) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 5)) 0)) is different from false [2021-12-18 19:52:57,612 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3581 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3581) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 6)) 0)) is different from false [2021-12-18 19:52:57,618 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3581 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3581) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 7)) 0)) is different from false [2021-12-18 19:52:57,624 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3581 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3581) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 8)) 0)) is different from false [2021-12-18 19:52:57,630 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3581 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3581) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 9)) 0)) is different from false [2021-12-18 19:52:57,636 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3581 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3581) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 10)) 0)) is different from false [2021-12-18 19:52:57,642 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3581 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3581) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 11)) 0)) is different from false [2021-12-18 19:52:57,648 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3581 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3581) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 12)) 0)) is different from false [2021-12-18 19:52:57,654 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3581 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3581) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 13)) 0)) is different from false [2021-12-18 19:52:57,660 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3581 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3581) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 14)) 0)) is different from false [2021-12-18 19:52:57,666 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3581 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3581) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 15)) 0)) is different from false [2021-12-18 19:52:57,672 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3581 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3581) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 16)) 0)) is different from false [2021-12-18 19:52:57,678 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3581 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3581) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 17)) 0)) is different from false [2021-12-18 19:52:57,692 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3581 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_3581) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 18)) 0)) is different from false [2021-12-18 19:52:57,699 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3581 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_3581) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 18)) 0)) is different from false [2021-12-18 19:52:57,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:52:57,702 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:52:57,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:52:57,705 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 37 [2021-12-18 19:52:57,707 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 11 treesize of output 7 [2021-12-18 19:52:57,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 37 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 665 not checked. [2021-12-18 19:52:57,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091552654] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:52:57,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:52:57,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 45, 45] total 89 [2021-12-18 19:52:57,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198962907] [2021-12-18 19:52:57,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:52:57,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-18 19:52:57,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:52:57,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-18 19:52:57,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=4674, Unknown=19, NotChecked=2926, Total=7832 [2021-12-18 19:52:57,977 INFO L87 Difference]: Start difference. First operand 192 states and 201 transitions. Second operand has 89 states, 89 states have (on average 3.561797752808989) internal successors, (317), 89 states have internal predecessors, (317), 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) [2021-12-18 19:53:00,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:53:00,380 INFO L93 Difference]: Finished difference Result 276 states and 285 transitions. [2021-12-18 19:53:00,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-18 19:53:00,380 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.561797752808989) internal successors, (317), 89 states have internal predecessors, (317), 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 157 [2021-12-18 19:53:00,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:53:00,381 INFO L225 Difference]: With dead ends: 276 [2021-12-18 19:53:00,381 INFO L226 Difference]: Without dead ends: 199 [2021-12-18 19:53:00,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 282 SyntacticMatches, 23 SemanticMatches, 109 ConstructedPredicates, 19 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=345, Invalid=8084, Unknown=19, NotChecked=3762, Total=12210 [2021-12-18 19:53:00,382 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 55 mSDsluCounter, 2069 mSDsCounter, 0 mSdLazyCounter, 5489 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 2112 SdHoareTripleChecker+Invalid, 8490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 5489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2979 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:53:00,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 2112 Invalid, 8490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 5489 Invalid, 0 Unknown, 2979 Unchecked, 1.3s Time] [2021-12-18 19:53:00,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-12-18 19:53:00,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 196. [2021-12-18 19:53:00,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 194 states have (on average 1.056701030927835) internal successors, (205), 195 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) [2021-12-18 19:53:00,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 205 transitions. [2021-12-18 19:53:00,384 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 205 transitions. Word has length 157 [2021-12-18 19:53:00,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:53:00,384 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 205 transitions. [2021-12-18 19:53:00,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.561797752808989) internal successors, (317), 89 states have internal predecessors, (317), 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) [2021-12-18 19:53:00,385 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 205 transitions. [2021-12-18 19:53:00,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-18 19:53:00,385 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:53:00,385 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:53:00,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-12-18 19:53:00,595 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,SelfDestructingSolverStorable52 [2021-12-18 19:53:00,595 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:53:00,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:53:00,596 INFO L85 PathProgramCache]: Analyzing trace with hash 512968886, now seen corresponding path program 28 times [2021-12-18 19:53:00,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:53:00,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654568345] [2021-12-18 19:53:00,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:53:00,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:53:00,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:53:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 561 proven. 845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:53:01,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:53:01,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654568345] [2021-12-18 19:53:01,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654568345] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:53:01,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965311584] [2021-12-18 19:53:01,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:53:01,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:53:01,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:53:01,334 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) [2021-12-18 19:53:01,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-18 19:53:01,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:53:01,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:53:01,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 182 conjunts are in the unsatisfiable core [2021-12-18 19:53:01,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:53:01,638 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 10 treesize of output 8 [2021-12-18 19:53:01,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 19:53:02,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-12-18 19:53:03,078 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 18 treesize of output 20 [2021-12-18 19:53:03,147 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 18 treesize of output 20 [2021-12-18 19:53:03,209 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 18 treesize of output 20 [2021-12-18 19:53:03,271 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 18 treesize of output 20 [2021-12-18 19:53:03,330 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 18 treesize of output 20 [2021-12-18 19:53:03,387 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 18 treesize of output 20 [2021-12-18 19:53:03,445 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 18 treesize of output 20 [2021-12-18 19:53:03,504 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 18 treesize of output 20 [2021-12-18 19:53:03,567 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 18 treesize of output 20 [2021-12-18 19:53:03,627 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 18 treesize of output 20 [2021-12-18 19:53:03,721 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 18 treesize of output 20 [2021-12-18 19:53:03,786 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 18 treesize of output 20 [2021-12-18 19:53:03,869 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 18 treesize of output 20 [2021-12-18 19:53:03,931 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 18 treesize of output 20 [2021-12-18 19:53:03,998 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 18 treesize of output 20 [2021-12-18 19:53:04,061 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 18 treesize of output 20 [2021-12-18 19:53:04,122 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 18 treesize of output 20 [2021-12-18 19:53:04,187 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 18 treesize of output 20 [2021-12-18 19:53:04,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:53:04,288 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 19 treesize of output 19 [2021-12-18 19:53:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 648 proven. 758 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:53:04,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:53:06,407 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcpy_~from#1.offset_722| Int) (v_ArrVal_3770 (Array Int Int))) (or (< |v_ULTIMATE.start_cstrcpy_~from#1.offset_722| 0) (< |c_ULTIMATE.start_main_~nondetString~0#1.offset| |v_ULTIMATE.start_cstrcpy_~from#1.offset_722|) (<= (+ |v_ULTIMATE.start_cstrcpy_~from#1.offset_722| 20) (select |c_#length| |c_ULTIMATE.start_main_~nondetString~0#1.base|)) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_3770) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |v_ULTIMATE.start_cstrcpy_~from#1.offset_722| 18))))) is different from false [2021-12-18 19:53:06,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:53:06,417 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:53:06,421 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:53:06,422 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 37 [2021-12-18 19:53:06,425 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 11 treesize of output 7 [2021-12-18 19:53:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 703 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:53:09,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965311584] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:53:09,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:53:09,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 46, 46] total 132 [2021-12-18 19:53:09,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392402896] [2021-12-18 19:53:09,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:53:09,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2021-12-18 19:53:09,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:53:09,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2021-12-18 19:53:09,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1922, Invalid=15372, Unknown=2, NotChecked=260, Total=17556 [2021-12-18 19:53:09,620 INFO L87 Difference]: Start difference. First operand 196 states and 205 transitions. Second operand has 133 states, 132 states have (on average 3.5984848484848486) internal successors, (475), 133 states have internal predecessors, (475), 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) [2021-12-18 19:53:12,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:53:12,575 INFO L93 Difference]: Finished difference Result 196 states and 203 transitions. [2021-12-18 19:53:12,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-18 19:53:12,576 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 132 states have (on average 3.5984848484848486) internal successors, (475), 133 states have internal predecessors, (475), 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 161 [2021-12-18 19:53:12,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:53:12,576 INFO L225 Difference]: With dead ends: 196 [2021-12-18 19:53:12,576 INFO L226 Difference]: Without dead ends: 196 [2021-12-18 19:53:12,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 260 SyntacticMatches, 4 SemanticMatches, 161 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5121 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=3880, Invalid=22184, Unknown=22, NotChecked=320, Total=26406 [2021-12-18 19:53:12,585 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 511 mSDsluCounter, 1654 mSDsCounter, 0 mSdLazyCounter, 3204 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 1699 SdHoareTripleChecker+Invalid, 5301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 3204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1653 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:53:12,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 1699 Invalid, 5301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 3204 Invalid, 0 Unknown, 1653 Unchecked, 1.1s Time] [2021-12-18 19:53:12,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-18 19:53:12,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2021-12-18 19:53:12,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 194 states have (on average 1.0463917525773196) internal successors, (203), 195 states have internal predecessors, (203), 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) [2021-12-18 19:53:12,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 203 transitions. [2021-12-18 19:53:12,591 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 203 transitions. Word has length 161 [2021-12-18 19:53:12,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:53:12,592 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 203 transitions. [2021-12-18 19:53:12,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 132 states have (on average 3.5984848484848486) internal successors, (475), 133 states have internal predecessors, (475), 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) [2021-12-18 19:53:12,592 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 203 transitions. [2021-12-18 19:53:12,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-18 19:53:12,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:53:12,593 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:53:12,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-12-18 19:53:12,802 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,SelfDestructingSolverStorable53 [2021-12-18 19:53:12,802 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:53:12,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:53:12,802 INFO L85 PathProgramCache]: Analyzing trace with hash -136139412, now seen corresponding path program 29 times [2021-12-18 19:53:12,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:53:12,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567630955] [2021-12-18 19:53:12,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:53:12,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:53:12,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:53:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 784 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:53:13,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:53:13,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567630955] [2021-12-18 19:53:13,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567630955] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:53:13,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534345977] [2021-12-18 19:53:13,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:53:13,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:53:13,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:53:13,514 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) [2021-12-18 19:53:13,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-18 19:53:26,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-12-18 19:53:26,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:53:26,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-18 19:53:26,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:53:26,504 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:53:26,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:53:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 861 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:53:28,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:53:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 841 proven. 723 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:53:29,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534345977] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:53:29,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:53:29,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 45, 45] total 108 [2021-12-18 19:53:29,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049962129] [2021-12-18 19:53:29,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:53:29,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-12-18 19:53:29,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:53:29,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-12-18 19:53:29,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1939, Invalid=9617, Unknown=0, NotChecked=0, Total=11556 [2021-12-18 19:53:29,571 INFO L87 Difference]: Start difference. First operand 196 states and 203 transitions. Second operand has 108 states, 108 states have (on average 3.814814814814815) internal successors, (412), 108 states have internal predecessors, (412), 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) [2021-12-18 19:53:30,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:53:30,685 INFO L93 Difference]: Finished difference Result 286 states and 293 transitions. [2021-12-18 19:53:30,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-18 19:53:30,685 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 3.814814814814815) internal successors, (412), 108 states have internal predecessors, (412), 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 169 [2021-12-18 19:53:30,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:53:30,686 INFO L225 Difference]: With dead ends: 286 [2021-12-18 19:53:30,686 INFO L226 Difference]: Without dead ends: 203 [2021-12-18 19:53:30,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 273 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5857 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4026, Invalid=18026, Unknown=0, NotChecked=0, Total=22052 [2021-12-18 19:53:30,687 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 172 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:53:30,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 343 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:53:30,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-18 19:53:30,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 200. [2021-12-18 19:53:30,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 198 states have (on average 1.0454545454545454) internal successors, (207), 199 states have internal predecessors, (207), 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) [2021-12-18 19:53:30,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 207 transitions. [2021-12-18 19:53:30,690 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 207 transitions. Word has length 169 [2021-12-18 19:53:30,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:53:30,690 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 207 transitions. [2021-12-18 19:53:30,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 3.814814814814815) internal successors, (412), 108 states have internal predecessors, (412), 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) [2021-12-18 19:53:30,690 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 207 transitions. [2021-12-18 19:53:30,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-18 19:53:30,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:53:30,691 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:53:30,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-12-18 19:53:30,908 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,SelfDestructingSolverStorable54 [2021-12-18 19:53:30,908 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:53:30,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:53:30,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1445923345, now seen corresponding path program 30 times [2021-12-18 19:53:30,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:53:30,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310512811] [2021-12-18 19:53:30,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:53:30,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:53:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:53:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 41 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:53:31,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:53:31,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310512811] [2021-12-18 19:53:31,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310512811] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:53:31,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015962330] [2021-12-18 19:53:31,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:53:31,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:53:31,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:53:31,901 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) [2021-12-18 19:53:31,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-18 19:55:41,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-12-18 19:55:41,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:55:41,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 210 conjunts are in the unsatisfiable core [2021-12-18 19:55:41,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:55:41,566 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 10 treesize of output 8 [2021-12-18 19:55:42,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:55:42,653 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 17 treesize of output 19 [2021-12-18 19:55:42,707 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 16 treesize of output 18 [2021-12-18 19:55:42,726 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 16 treesize of output 18 [2021-12-18 19:55:42,747 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 16 treesize of output 18 [2021-12-18 19:55:42,766 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 16 treesize of output 18 [2021-12-18 19:55:42,784 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 16 treesize of output 18 [2021-12-18 19:55:42,802 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 16 treesize of output 18 [2021-12-18 19:55:42,819 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 16 treesize of output 18 [2021-12-18 19:55:42,838 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 16 treesize of output 18 [2021-12-18 19:55:42,856 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 16 treesize of output 18 [2021-12-18 19:55:42,874 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 16 treesize of output 18 [2021-12-18 19:55:42,910 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 16 treesize of output 18 [2021-12-18 19:55:42,930 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 16 treesize of output 18 [2021-12-18 19:55:42,946 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 16 treesize of output 18 [2021-12-18 19:55:42,965 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 16 treesize of output 18 [2021-12-18 19:55:42,984 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 16 treesize of output 18 [2021-12-18 19:55:43,001 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 16 treesize of output 18 [2021-12-18 19:55:43,020 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 16 treesize of output 18 [2021-12-18 19:55:43,038 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 16 treesize of output 18 [2021-12-18 19:55:43,055 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 16 treesize of output 18 [2021-12-18 19:55:43,107 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 [2021-12-18 19:55:43,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 41 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:55:43,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:55:43,156 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4148 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4148) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-18 19:55:43,162 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4148 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4148) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) 0)) is different from false [2021-12-18 19:55:43,171 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4148 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4148) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3)) 0)) is different from false [2021-12-18 19:55:43,181 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4148 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4148) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-18 19:55:43,190 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4148 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4148) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 5)) 0)) is different from false [2021-12-18 19:55:43,200 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4148 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4148) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 6)) 0)) is different from false [2021-12-18 19:55:43,210 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4148 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4148) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 7)) 0)) is different from false [2021-12-18 19:55:43,219 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4148 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4148) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 8)) 0)) is different from false [2021-12-18 19:55:43,229 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4148 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4148) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 9)) 0)) is different from false [2021-12-18 19:55:43,238 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4148 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4148) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 10)) 0)) is different from false [2021-12-18 19:55:43,248 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4148 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4148) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 11)) 0)) is different from false [2021-12-18 19:55:43,258 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4148 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4148) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 12)) 0)) is different from false [2021-12-18 19:55:43,268 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4148 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4148) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 13)) 0)) is different from false [2021-12-18 19:55:43,277 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4148 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4148) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 14)) 0)) is different from false [2021-12-18 19:55:43,287 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4148 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4148) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 15)) 0)) is different from false [2021-12-18 19:55:43,297 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4148 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4148) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 16)) 0)) is different from false [2021-12-18 19:55:43,307 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4148 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4148) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 17)) 0)) is different from false [2021-12-18 19:55:43,317 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4148 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4148) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 18)) 0)) is different from false [2021-12-18 19:55:43,328 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4148 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4148) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 19)) 0)) is different from false [2021-12-18 19:55:43,339 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4148 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4148) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 20)) 0)) is different from false [2021-12-18 19:55:43,350 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4148 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_4148) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 20)) 0)) is different from false [2021-12-18 19:55:43,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:55:43,355 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:55:43,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:55:43,360 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 37 [2021-12-18 19:55:43,363 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 11 treesize of output 7 [2021-12-18 19:55:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 41 proven. 781 refuted. 0 times theorem prover too weak. 0 trivial. 819 not checked. [2021-12-18 19:55:43,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015962330] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:55:43,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:55:43,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49, 49] total 97 [2021-12-18 19:55:43,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581446294] [2021-12-18 19:55:43,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:55:43,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-18 19:55:43,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:55:43,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-18 19:55:43,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=5532, Unknown=21, NotChecked=3528, Total=9312 [2021-12-18 19:55:43,853 INFO L87 Difference]: Start difference. First operand 200 states and 207 transitions. Second operand has 97 states, 97 states have (on average 3.597938144329897) internal successors, (349), 97 states have internal predecessors, (349), 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) [2021-12-18 19:55:46,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:55:46,755 INFO L93 Difference]: Finished difference Result 292 states and 299 transitions. [2021-12-18 19:55:46,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-18 19:55:46,756 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.597938144329897) internal successors, (349), 97 states have internal predecessors, (349), 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 173 [2021-12-18 19:55:46,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:55:46,757 INFO L225 Difference]: With dead ends: 292 [2021-12-18 19:55:46,757 INFO L226 Difference]: Without dead ends: 207 [2021-12-18 19:55:46,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 313 SyntacticMatches, 24 SemanticMatches, 119 ConstructedPredicates, 21 IntricatePredicates, 0 DeprecatedPredicates, 1287 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=373, Invalid=9590, Unknown=21, NotChecked=4536, Total=14520 [2021-12-18 19:55:46,758 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 68 mSDsluCounter, 2664 mSDsCounter, 0 mSdLazyCounter, 6930 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 2711 SdHoareTripleChecker+Invalid, 10056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 6930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3101 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:55:46,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 2711 Invalid, 10056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 6930 Invalid, 0 Unknown, 3101 Unchecked, 1.7s Time] [2021-12-18 19:55:46,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-12-18 19:55:46,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 204. [2021-12-18 19:55:46,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 202 states have (on average 1.0445544554455446) internal successors, (211), 203 states have internal predecessors, (211), 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) [2021-12-18 19:55:46,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 211 transitions. [2021-12-18 19:55:46,768 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 211 transitions. Word has length 173 [2021-12-18 19:55:46,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:55:46,769 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 211 transitions. [2021-12-18 19:55:46,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.597938144329897) internal successors, (349), 97 states have internal predecessors, (349), 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) [2021-12-18 19:55:46,769 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 211 transitions. [2021-12-18 19:55:46,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-18 19:55:46,770 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:55:46,770 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:55:46,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-12-18 19:55:46,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:55:46,986 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:55:46,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:55:46,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1299102478, now seen corresponding path program 31 times [2021-12-18 19:55:46,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:55:46,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631157219] [2021-12-18 19:55:46,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:55:46,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:55:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:55:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 703 proven. 1019 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:55:47,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:55:47,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631157219] [2021-12-18 19:55:47,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631157219] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:55:47,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034600148] [2021-12-18 19:55:47,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:55:47,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:55:47,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:55:47,842 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:55:47,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-18 19:55:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:55:48,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 117 conjunts are in the unsatisfiable core [2021-12-18 19:55:48,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:55:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 780 proven. 942 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:55:49,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:55:50,246 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 5 treesize of output 3 [2021-12-18 19:55:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 780 proven. 942 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:55:50,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034600148] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:55:50,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:55:50,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 47, 47] total 94 [2021-12-18 19:55:50,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203832984] [2021-12-18 19:55:50,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:55:50,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-12-18 19:55:50,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:55:50,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-12-18 19:55:50,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=874, Invalid=8056, Unknown=0, NotChecked=0, Total=8930 [2021-12-18 19:55:50,338 INFO L87 Difference]: Start difference. First operand 204 states and 211 transitions. Second operand has 95 states, 94 states have (on average 3.7872340425531914) internal successors, (356), 95 states have internal predecessors, (356), 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) [2021-12-18 19:55:52,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:55:52,299 INFO L93 Difference]: Finished difference Result 204 states and 210 transitions. [2021-12-18 19:55:52,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-18 19:55:52,299 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 3.7872340425531914) internal successors, (356), 95 states have internal predecessors, (356), 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 177 [2021-12-18 19:55:52,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:55:52,303 INFO L225 Difference]: With dead ends: 204 [2021-12-18 19:55:52,303 INFO L226 Difference]: Without dead ends: 204 [2021-12-18 19:55:52,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 302 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3076 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3476, Invalid=15706, Unknown=0, NotChecked=0, Total=19182 [2021-12-18 19:55:52,315 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 745 mSDsluCounter, 1392 mSDsCounter, 0 mSdLazyCounter, 4156 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 1440 SdHoareTripleChecker+Invalid, 4378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 4156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 19:55:52,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [745 Valid, 1440 Invalid, 4378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 4156 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-18 19:55:52,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-12-18 19:55:52,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2021-12-18 19:55:52,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 202 states have (on average 1.0396039603960396) internal successors, (210), 203 states have internal predecessors, (210), 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) [2021-12-18 19:55:52,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 210 transitions. [2021-12-18 19:55:52,318 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 210 transitions. Word has length 177 [2021-12-18 19:55:52,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:55:52,318 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 210 transitions. [2021-12-18 19:55:52,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 3.7872340425531914) internal successors, (356), 95 states have internal predecessors, (356), 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) [2021-12-18 19:55:52,318 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 210 transitions. [2021-12-18 19:55:52,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-12-18 19:55:52,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:55:52,319 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:55:52,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-12-18 19:55:52,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:55:52,524 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:55:52,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:55:52,524 INFO L85 PathProgramCache]: Analyzing trace with hash -845448179, now seen corresponding path program 32 times [2021-12-18 19:55:52,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:55:52,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526469158] [2021-12-18 19:55:52,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:55:52,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:55:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:55:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 43 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:55:53,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:55:53,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526469158] [2021-12-18 19:55:53,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526469158] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:55:53,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156653932] [2021-12-18 19:55:53,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:55:53,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:55:53,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:55:53,949 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:55:53,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-18 19:55:54,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:55:54,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:55:54,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 202 conjunts are in the unsatisfiable core [2021-12-18 19:55:54,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:55:54,312 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 10 treesize of output 8 [2021-12-18 19:55:54,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 19:55:56,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:55:56,350 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 17 treesize of output 19 [2021-12-18 19:55:56,509 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 17 treesize of output 19 [2021-12-18 19:55:56,640 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 17 treesize of output 19 [2021-12-18 19:55:56,817 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 17 treesize of output 19 [2021-12-18 19:55:56,992 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 17 treesize of output 19 [2021-12-18 19:55:57,179 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 17 treesize of output 19 [2021-12-18 19:55:57,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:55:57,555 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 17 treesize of output 19 [2021-12-18 19:55:57,759 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 17 treesize of output 19 [2021-12-18 19:55:57,938 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 17 treesize of output 19 [2021-12-18 19:55:58,126 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 17 treesize of output 19 [2021-12-18 19:55:58,315 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 17 treesize of output 19 [2021-12-18 19:55:58,506 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 17 treesize of output 19 [2021-12-18 19:55:58,710 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 17 treesize of output 19 [2021-12-18 19:55:58,908 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 17 treesize of output 19 [2021-12-18 19:55:59,122 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 17 treesize of output 19 [2021-12-18 19:55:59,312 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 17 treesize of output 19 [2021-12-18 19:55:59,506 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 17 treesize of output 19 [2021-12-18 19:55:59,705 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 17 treesize of output 19 [2021-12-18 19:55:59,911 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 17 treesize of output 19 [2021-12-18 19:56:00,119 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 17 treesize of output 19 [2021-12-18 19:56:00,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:56:00,392 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 18 treesize of output 18 [2021-12-18 19:56:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 780 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:00,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:56:03,575 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4542 (Array Int Int)) (|v_ULTIMATE.start_cstrcpy_~from#1.offset_894| Int)) (or (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_4542) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |v_ULTIMATE.start_cstrcpy_~from#1.offset_894| 21))) (< |v_ULTIMATE.start_cstrcpy_~from#1.offset_894| 0) (< |c_ULTIMATE.start_main_~nondetString~0#1.offset| |v_ULTIMATE.start_cstrcpy_~from#1.offset_894|) (<= (+ |v_ULTIMATE.start_cstrcpy_~from#1.offset_894| 23) (select |c_#length| |c_ULTIMATE.start_main_~nondetString~0#1.base|)))) is different from false [2021-12-18 19:56:03,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:56:03,583 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:56:03,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:56:03,588 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 37 [2021-12-18 19:56:03,591 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 11 treesize of output 7 [2021-12-18 19:56:07,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 861 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:07,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156653932] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:56:07,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:56:07,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 51, 51] total 150 [2021-12-18 19:56:07,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008940437] [2021-12-18 19:56:07,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:56:07,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2021-12-18 19:56:07,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:07,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2021-12-18 19:56:07,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1398, Invalid=20656, Unknown=2, NotChecked=294, Total=22350 [2021-12-18 19:56:07,377 INFO L87 Difference]: Start difference. First operand 204 states and 210 transitions. Second operand has 150 states, 150 states have (on average 3.566666666666667) internal successors, (535), 150 states have internal predecessors, (535), 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) [2021-12-18 19:56:11,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:56:11,232 INFO L93 Difference]: Finished difference Result 300 states and 305 transitions. [2021-12-18 19:56:11,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-18 19:56:11,233 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 3.566666666666667) internal successors, (535), 150 states have internal predecessors, (535), 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 181 [2021-12-18 19:56:11,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:56:11,234 INFO L225 Difference]: With dead ends: 300 [2021-12-18 19:56:11,234 INFO L226 Difference]: Without dead ends: 211 [2021-12-18 19:56:11,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 345 SyntacticMatches, 1 SemanticMatches, 200 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5223 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=2794, Invalid=37408, Unknown=2, NotChecked=398, Total=40602 [2021-12-18 19:56:11,236 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 285 mSDsluCounter, 3346 mSDsCounter, 0 mSdLazyCounter, 3266 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 3396 SdHoareTripleChecker+Invalid, 5391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2095 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 19:56:11,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 3396 Invalid, 5391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3266 Invalid, 0 Unknown, 2095 Unchecked, 0.8s Time] [2021-12-18 19:56:11,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-12-18 19:56:11,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2021-12-18 19:56:11,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 206 states have (on average 1.0339805825242718) internal successors, (213), 207 states have internal predecessors, (213), 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) [2021-12-18 19:56:11,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 213 transitions. [2021-12-18 19:56:11,239 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 213 transitions. Word has length 181 [2021-12-18 19:56:11,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:56:11,239 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 213 transitions. [2021-12-18 19:56:11,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 3.566666666666667) internal successors, (535), 150 states have internal predecessors, (535), 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) [2021-12-18 19:56:11,240 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 213 transitions. [2021-12-18 19:56:11,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-12-18 19:56:11,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:56:11,240 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:56:11,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-12-18 19:56:11,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-12-18 19:56:11,460 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:56:11,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:56:11,460 INFO L85 PathProgramCache]: Analyzing trace with hash 2138673195, now seen corresponding path program 33 times [2021-12-18 19:56:11,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:56:11,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262863021] [2021-12-18 19:56:11,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:56:11,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:56:11,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:56:12,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 45 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:12,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:56:12,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262863021] [2021-12-18 19:56:12,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262863021] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:56:12,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361794468] [2021-12-18 19:56:12,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:56:12,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:56:12,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:56:12,951 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:56:12,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-18 19:56:51,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-12-18 19:56:51,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:56:51,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 284 conjunts are in the unsatisfiable core [2021-12-18 19:56:51,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:56:51,988 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 10 treesize of output 8 [2021-12-18 19:56:53,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:56:53,993 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 16 treesize of output 18 [2021-12-18 19:56:54,104 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 16 treesize of output 18 [2021-12-18 19:56:54,215 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 16 treesize of output 18 [2021-12-18 19:56:54,304 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 16 treesize of output 18 [2021-12-18 19:56:54,382 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 16 treesize of output 18 [2021-12-18 19:56:54,467 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 16 treesize of output 18 [2021-12-18 19:56:54,550 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 16 treesize of output 18 [2021-12-18 19:56:54,631 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 16 treesize of output 18 [2021-12-18 19:56:54,715 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 16 treesize of output 18 [2021-12-18 19:56:54,801 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 16 treesize of output 18 [2021-12-18 19:56:54,889 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 16 treesize of output 18 [2021-12-18 19:56:54,983 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 16 treesize of output 18 [2021-12-18 19:56:55,088 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 16 treesize of output 18 [2021-12-18 19:56:55,194 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 16 treesize of output 18 [2021-12-18 19:56:55,322 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 16 treesize of output 18 [2021-12-18 19:56:55,444 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 16 treesize of output 18 [2021-12-18 19:56:55,565 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 16 treesize of output 18 [2021-12-18 19:56:55,682 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 16 treesize of output 18 [2021-12-18 19:56:55,803 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 16 treesize of output 18 [2021-12-18 19:56:55,914 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 16 treesize of output 18 [2021-12-18 19:56:56,027 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 16 treesize of output 18 [2021-12-18 19:56:56,156 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 16 treesize of output 18 [2021-12-18 19:56:56,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:56:56,270 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:56:56,270 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 17 treesize of output 10 [2021-12-18 19:56:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 45 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:56:56,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:56:56,377 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4761) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-18 19:56:56,383 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4761) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) 0)) is different from false [2021-12-18 19:56:56,392 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4761) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3)) 0)) is different from false [2021-12-18 19:56:56,403 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4761) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-18 19:56:56,412 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4761) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 5)) 0)) is different from false [2021-12-18 19:56:56,422 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4761) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 6)) 0)) is different from false [2021-12-18 19:56:56,432 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4761) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 7)) 0)) is different from false [2021-12-18 19:56:56,441 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4761) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 8)) 0)) is different from false [2021-12-18 19:56:56,451 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4761) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 9)) 0)) is different from false [2021-12-18 19:56:56,461 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4761) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 10)) 0)) is different from false [2021-12-18 19:56:56,470 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4761) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 11)) 0)) is different from false [2021-12-18 19:56:56,480 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4761) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 12)) 0)) is different from false [2021-12-18 19:56:56,490 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4761) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 13)) 0)) is different from false [2021-12-18 19:56:56,499 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4761) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 14)) 0)) is different from false [2021-12-18 19:56:56,509 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4761) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 15)) 0)) is different from false [2021-12-18 19:56:56,519 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4761) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 16)) 0)) is different from false [2021-12-18 19:56:56,529 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4761) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 17)) 0)) is different from false [2021-12-18 19:56:56,539 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4761) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 18)) 0)) is different from false [2021-12-18 19:56:56,549 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4761) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 19)) 0)) is different from false [2021-12-18 19:56:56,559 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4761) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 20)) 0)) is different from false [2021-12-18 19:56:56,570 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4761) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 21)) 0)) is different from false [2021-12-18 19:56:56,581 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_4761) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 22)) 0)) is different from false [2021-12-18 19:56:56,593 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_4761) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 22)) 0)) is different from false [2021-12-18 19:56:56,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:56:56,598 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:56:56,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:56:56,602 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 37 [2021-12-18 19:56:56,605 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 11 treesize of output 7 [2021-12-18 19:56:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 45 proven. 947 refuted. 0 times theorem prover too weak. 0 trivial. 989 not checked. [2021-12-18 19:56:58,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361794468] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:56:58,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:56:58,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 53] total 150 [2021-12-18 19:56:58,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116677592] [2021-12-18 19:56:58,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:56:58,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2021-12-18 19:56:58,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:56:58,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2021-12-18 19:56:58,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=15658, Unknown=23, NotChecked=6256, Total=22350 [2021-12-18 19:56:58,298 INFO L87 Difference]: Start difference. First operand 208 states and 213 transitions. Second operand has 150 states, 150 states have (on average 3.6666666666666665) internal successors, (550), 150 states have internal predecessors, (550), 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) [2021-12-18 19:57:01,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:01,554 INFO L93 Difference]: Finished difference Result 308 states and 313 transitions. [2021-12-18 19:57:01,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-12-18 19:57:01,555 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 3.6666666666666665) internal successors, (550), 150 states have internal predecessors, (550), 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 189 [2021-12-18 19:57:01,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:01,555 INFO L225 Difference]: With dead ends: 308 [2021-12-18 19:57:01,556 INFO L226 Difference]: Without dead ends: 215 [2021-12-18 19:57:01,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 301 SyntacticMatches, 15 SemanticMatches, 179 ConstructedPredicates, 23 IntricatePredicates, 8 DeprecatedPredicates, 5999 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=601, Invalid=24274, Unknown=23, NotChecked=7682, Total=32580 [2021-12-18 19:57:01,557 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 59 mSDsluCounter, 4117 mSDsCounter, 0 mSdLazyCounter, 4801 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 4168 SdHoareTripleChecker+Invalid, 8283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 4801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3458 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:01,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 4168 Invalid, 8283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 4801 Invalid, 0 Unknown, 3458 Unchecked, 1.3s Time] [2021-12-18 19:57:01,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-12-18 19:57:01,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 212. [2021-12-18 19:57:01,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 210 states have (on average 1.0333333333333334) internal successors, (217), 211 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) [2021-12-18 19:57:01,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 217 transitions. [2021-12-18 19:57:01,559 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 217 transitions. Word has length 189 [2021-12-18 19:57:01,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:01,560 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 217 transitions. [2021-12-18 19:57:01,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 3.6666666666666665) internal successors, (550), 150 states have internal predecessors, (550), 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) [2021-12-18 19:57:01,560 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 217 transitions. [2021-12-18 19:57:01,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-12-18 19:57:01,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:01,561 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:01,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-12-18 19:57:01,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-18 19:57:01,787 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:57:01,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:01,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1706653998, now seen corresponding path program 34 times [2021-12-18 19:57:01,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:01,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988383056] [2021-12-18 19:57:01,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:01,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 861 proven. 1209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:57:02,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:02,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988383056] [2021-12-18 19:57:02,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988383056] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:57:02,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447899035] [2021-12-18 19:57:02,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:57:02,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:02,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:57:02,747 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:57:02,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-18 19:57:03,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:57:03,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:57:03,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 216 conjunts are in the unsatisfiable core [2021-12-18 19:57:03,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:57:03,143 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:57:03,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:57:03,148 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 10 treesize of output 8 [2021-12-18 19:57:04,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-12-18 19:57:05,090 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 18 treesize of output 20 [2021-12-18 19:57:05,179 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 18 treesize of output 20 [2021-12-18 19:57:05,269 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 18 treesize of output 20 [2021-12-18 19:57:05,361 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 18 treesize of output 20 [2021-12-18 19:57:05,452 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 18 treesize of output 20 [2021-12-18 19:57:05,544 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 18 treesize of output 20 [2021-12-18 19:57:05,637 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 18 treesize of output 20 [2021-12-18 19:57:05,733 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 18 treesize of output 20 [2021-12-18 19:57:05,833 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 18 treesize of output 20 [2021-12-18 19:57:05,928 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 18 treesize of output 20 [2021-12-18 19:57:06,027 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 18 treesize of output 20 [2021-12-18 19:57:06,139 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 18 treesize of output 20 [2021-12-18 19:57:06,247 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 18 treesize of output 20 [2021-12-18 19:57:06,349 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 18 treesize of output 20 [2021-12-18 19:57:06,454 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 18 treesize of output 20 [2021-12-18 19:57:06,551 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 18 treesize of output 20 [2021-12-18 19:57:06,627 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 18 treesize of output 20 [2021-12-18 19:57:06,705 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 18 treesize of output 20 [2021-12-18 19:57:06,781 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 18 treesize of output 20 [2021-12-18 19:57:06,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-18 19:57:06,939 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 18 treesize of output 20 [2021-12-18 19:57:07,016 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 18 treesize of output 20 [2021-12-18 19:57:07,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:57:07,131 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 19 treesize of output 19 [2021-12-18 19:57:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 968 proven. 1102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:57:07,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:57:09,522 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcpy_~from#1.offset_987| Int) (v_ArrVal_4987 (Array Int Int))) (or (< |c_ULTIMATE.start_main_~nondetString~0#1.offset| |v_ULTIMATE.start_cstrcpy_~from#1.offset_987|) (<= (+ |v_ULTIMATE.start_cstrcpy_~from#1.offset_987| 24) (select |c_#length| |c_ULTIMATE.start_main_~nondetString~0#1.base|)) (< |v_ULTIMATE.start_cstrcpy_~from#1.offset_987| 0) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_4987) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |v_ULTIMATE.start_cstrcpy_~from#1.offset_987| 22))))) is different from false [2021-12-18 19:57:09,528 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:57:09,528 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:57:09,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:57:09,533 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 37 [2021-12-18 19:57:09,535 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 11 treesize of output 7 [2021-12-18 19:57:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 1035 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:57:13,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447899035] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:57:13,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:57:13,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 54, 54] total 156 [2021-12-18 19:57:13,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939853251] [2021-12-18 19:57:13,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:57:13,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 157 states [2021-12-18 19:57:13,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:57:13,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2021-12-18 19:57:13,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2683, Invalid=21500, Unknown=1, NotChecked=308, Total=24492 [2021-12-18 19:57:13,732 INFO L87 Difference]: Start difference. First operand 212 states and 217 transitions. Second operand has 157 states, 156 states have (on average 3.66025641025641) internal successors, (571), 157 states have internal predecessors, (571), 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) [2021-12-18 19:57:17,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:57:17,879 INFO L93 Difference]: Finished difference Result 212 states and 215 transitions. [2021-12-18 19:57:17,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-18 19:57:17,880 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 156 states have (on average 3.66025641025641) internal successors, (571), 157 states have internal predecessors, (571), 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 193 [2021-12-18 19:57:17,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:57:17,880 INFO L225 Difference]: With dead ends: 212 [2021-12-18 19:57:17,880 INFO L226 Difference]: Without dead ends: 212 [2021-12-18 19:57:17,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 301 SyntacticMatches, 4 SemanticMatches, 189 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7248 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=5358, Invalid=30521, Unknown=35, NotChecked=376, Total=36290 [2021-12-18 19:57:17,882 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 793 mSDsluCounter, 1918 mSDsCounter, 0 mSdLazyCounter, 3970 mSolverCounterSat, 679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 1970 SdHoareTripleChecker+Invalid, 7062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 679 IncrementalHoareTripleChecker+Valid, 3970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2413 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:57:17,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [793 Valid, 1970 Invalid, 7062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [679 Valid, 3970 Invalid, 0 Unknown, 2413 Unchecked, 1.5s Time] [2021-12-18 19:57:17,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-18 19:57:17,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-12-18 19:57:17,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 210 states have (on average 1.0238095238095237) internal successors, (215), 211 states have internal predecessors, (215), 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) [2021-12-18 19:57:17,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 215 transitions. [2021-12-18 19:57:17,884 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 215 transitions. Word has length 193 [2021-12-18 19:57:17,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:57:17,885 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 215 transitions. [2021-12-18 19:57:17,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 157 states, 156 states have (on average 3.66025641025641) internal successors, (571), 157 states have internal predecessors, (571), 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) [2021-12-18 19:57:17,885 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 215 transitions. [2021-12-18 19:57:17,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-18 19:57:17,886 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:57:17,886 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:57:17,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-12-18 19:57:18,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-18 19:57:18,105 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:57:18,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:57:18,106 INFO L85 PathProgramCache]: Analyzing trace with hash 233629156, now seen corresponding path program 35 times [2021-12-18 19:57:18,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:57:18,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604038873] [2021-12-18 19:57:18,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:57:18,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:57:18,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:57:19,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2260 backedges. 1132 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:57:19,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:57:19,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604038873] [2021-12-18 19:57:19,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604038873] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:57:19,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28656508] [2021-12-18 19:57:19,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:57:19,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:57:19,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:57:19,119 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:57:19,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-18 19:59:43,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-12-18 19:59:43,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:59:43,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 110 conjunts are in the unsatisfiable core [2021-12-18 19:59:43,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:59:43,741 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:59:43,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:59:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2260 backedges. 1225 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:59:45,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:59:47,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2260 backedges. 1225 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:59:47,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28656508] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:59:47,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:59:47,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 129 [2021-12-18 19:59:47,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513537260] [2021-12-18 19:59:47,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:59:47,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2021-12-18 19:59:47,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:59:47,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-12-18 19:59:47,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3012, Invalid=13500, Unknown=0, NotChecked=0, Total=16512 [2021-12-18 19:59:47,216 INFO L87 Difference]: Start difference. First operand 212 states and 215 transitions. Second operand has 129 states, 129 states have (on average 3.8294573643410854) internal successors, (494), 129 states have internal predecessors, (494), 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) [2021-12-18 19:59:48,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:59:48,020 INFO L93 Difference]: Finished difference Result 318 states and 321 transitions. [2021-12-18 19:59:48,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-18 19:59:48,021 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 3.8294573643410854) internal successors, (494), 129 states have internal predecessors, (494), 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 201 [2021-12-18 19:59:48,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:59:48,021 INFO L225 Difference]: With dead ends: 318 [2021-12-18 19:59:48,021 INFO L226 Difference]: Without dead ends: 219 [2021-12-18 19:59:48,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 325 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5988 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4796, Invalid=19074, Unknown=0, NotChecked=0, Total=23870 [2021-12-18 19:59:48,023 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 188 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:59:48,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 308 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:59:48,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-12-18 19:59:48,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 216. [2021-12-18 19:59:48,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 214 states have (on average 1.0233644859813085) internal successors, (219), 215 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) [2021-12-18 19:59:48,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 219 transitions. [2021-12-18 19:59:48,026 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 219 transitions. Word has length 201 [2021-12-18 19:59:48,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:59:48,026 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 219 transitions. [2021-12-18 19:59:48,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 3.8294573643410854) internal successors, (494), 129 states have internal predecessors, (494), 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) [2021-12-18 19:59:48,026 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 219 transitions. [2021-12-18 19:59:48,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-18 19:59:48,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:59:48,027 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:59:48,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-12-18 19:59:48,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:48,247 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 19:59:48,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:59:48,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1709153689, now seen corresponding path program 36 times [2021-12-18 19:59:48,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:59:48,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123975342] [2021-12-18 19:59:48,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:59:48,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:59:48,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:59:49,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 49 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:59:49,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:59:49,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123975342] [2021-12-18 19:59:49,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123975342] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:59:49,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242266401] [2021-12-18 19:59:49,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:59:49,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:59:49,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:59:49,692 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:59:49,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process Killed by 15