/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/verifythis/duplets.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 15:50:47,533 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 15:50:47,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 15:50:47,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 15:50:47,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 15:50:47,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 15:50:47,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 15:50:47,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 15:50:47,611 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 15:50:47,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 15:50:47,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 15:50:47,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 15:50:47,616 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 15:50:47,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 15:50:47,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 15:50:47,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 15:50:47,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 15:50:47,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 15:50:47,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 15:50:47,628 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 15:50:47,629 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 15:50:47,630 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 15:50:47,631 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 15:50:47,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 15:50:47,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 15:50:47,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 15:50:47,639 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-17 15:50:47,641 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-17 15:50:47,641 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-17 15:50:47,642 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-17 15:50:47,642 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-17 15:50:47,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-17 15:50:47,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-17 15:50:47,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-17 15:50:47,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 15:50:47,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 15:50:47,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 15:50:47,645 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 15:50:47,652 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 15:50:47,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 15:50:47,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 15:50:47,655 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 15:50:47,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 15:50:47,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 15:50:47,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 15:50:47,655 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 15:50:47,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 15:50:47,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 15:50:47,656 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 15:50:47,656 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 15:50:47,656 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 15:50:47,656 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 15:50:47,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 15:50:47,657 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 15:50:47,657 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 15:50:47,657 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 15:50:47,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:50:47,657 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 15:50:47,657 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 15:50:47,658 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 15:50:47,658 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 15:50:47,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 15:50:47,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 15:50:47,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 15:50:47,871 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 15:50:47,872 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 15:50:47,873 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/duplets.c [2022-03-17 15:50:47,917 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cdea13dc/16b72f84054c423592259d0fabcb5173/FLAG68dc08869 [2022-03-17 15:50:48,281 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 15:50:48,281 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/duplets.c [2022-03-17 15:50:48,287 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cdea13dc/16b72f84054c423592259d0fabcb5173/FLAG68dc08869 [2022-03-17 15:50:48,700 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cdea13dc/16b72f84054c423592259d0fabcb5173 [2022-03-17 15:50:48,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 15:50:48,704 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 15:50:48,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 15:50:48,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 15:50:48,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 15:50:48,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:50:48" (1/1) ... [2022-03-17 15:50:48,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44ea4fcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:50:48, skipping insertion in model container [2022-03-17 15:50:48,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:50:48" (1/1) ... [2022-03-17 15:50:48,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 15:50:48,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 15:50:48,850 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/duplets.c[485,498] [2022-03-17 15:50:48,866 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:50:48,873 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 15:50:48,880 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/duplets.c[485,498] [2022-03-17 15:50:48,886 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:50:48,895 INFO L208 MainTranslator]: Completed translation [2022-03-17 15:50:48,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:50:48 WrapperNode [2022-03-17 15:50:48,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 15:50:48,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 15:50:48,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 15:50:48,896 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 15:50:48,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:50:48" (1/1) ... [2022-03-17 15:50:48,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:50:48" (1/1) ... [2022-03-17 15:50:48,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:50:48" (1/1) ... [2022-03-17 15:50:48,909 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:50:48" (1/1) ... [2022-03-17 15:50:48,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:50:48" (1/1) ... [2022-03-17 15:50:48,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:50:48" (1/1) ... [2022-03-17 15:50:48,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:50:48" (1/1) ... [2022-03-17 15:50:48,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 15:50:48,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 15:50:48,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 15:50:48,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 15:50:48,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:50:48" (1/1) ... [2022-03-17 15:50:48,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:50:48,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:50:48,941 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 15:50:48,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 15:50:49,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 15:50:49,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 15:50:49,025 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 15:50:49,025 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 15:50:49,025 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 15:50:49,025 INFO L138 BoogieDeclarations]: Found implementation of procedure mkdup [2022-03-17 15:50:49,025 INFO L138 BoogieDeclarations]: Found implementation of procedure finddup [2022-03-17 15:50:49,026 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 15:50:49,026 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-03-17 15:50:49,026 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-03-17 15:50:49,026 INFO L130 BoogieDeclarations]: Found specification of procedure free [2022-03-17 15:50:49,026 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 15:50:49,027 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 15:50:49,027 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 15:50:49,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 15:50:49,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 15:50:49,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 15:50:49,029 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 15:50:49,029 INFO L130 BoogieDeclarations]: Found specification of procedure mkdup [2022-03-17 15:50:49,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 15:50:49,030 INFO L130 BoogieDeclarations]: Found specification of procedure finddup [2022-03-17 15:50:49,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 15:50:49,030 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 15:50:49,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-03-17 15:50:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-17 15:50:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-03-17 15:50:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 15:50:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 15:50:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 15:50:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 15:50:49,116 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 15:50:49,117 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 15:50:49,349 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 15:50:49,354 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 15:50:49,354 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 15:50:49,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:50:49 BoogieIcfgContainer [2022-03-17 15:50:49,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 15:50:49,356 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 15:50:49,356 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 15:50:49,362 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 15:50:49,364 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:50:49" (1/1) ... [2022-03-17 15:50:49,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:50:49 BasicIcfg [2022-03-17 15:50:49,391 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 15:50:49,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 15:50:49,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 15:50:49,397 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 15:50:49,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 03:50:48" (1/4) ... [2022-03-17 15:50:49,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ac3d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:50:49, skipping insertion in model container [2022-03-17 15:50:49,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:50:48" (2/4) ... [2022-03-17 15:50:49,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ac3d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:50:49, skipping insertion in model container [2022-03-17 15:50:49,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:50:49" (3/4) ... [2022-03-17 15:50:49,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ac3d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 03:50:49, skipping insertion in model container [2022-03-17 15:50:49,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:50:49" (4/4) ... [2022-03-17 15:50:49,401 INFO L111 eAbstractionObserver]: Analyzing ICFG duplets.cJordan [2022-03-17 15:50:49,406 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 15:50:49,407 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 15:50:49,446 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 15:50:49,452 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, 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 [2022-03-17 15:50:49,453 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 15:50:49,472 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 37 states have internal predecessors, (46), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-17 15:50:49,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-17 15:50:49,478 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:50:49,479 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:50:49,480 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:50:49,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:50:49,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1613559281, now seen corresponding path program 1 times [2022-03-17 15:50:49,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:50:49,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982587425] [2022-03-17 15:50:49,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:50:49,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:50:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:49,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:50:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:49,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:50:49,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:49,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 15:50:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:49,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 15:50:49,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:49,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-17 15:50:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:49,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:50:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:49,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 15:50:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:49,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-17 15:50:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 15:50:49,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:50:49,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982587425] [2022-03-17 15:50:49,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982587425] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:50:49,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:50:49,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 15:50:49,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737626021] [2022-03-17 15:50:49,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:50:49,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 15:50:49,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:50:49,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 15:50:49,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 15:50:49,723 INFO L87 Difference]: Start difference. First operand has 59 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 37 states have internal predecessors, (46), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 2 states have internal predecessors, (22), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-17 15:50:49,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:50:49,834 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2022-03-17 15:50:49,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 15:50:49,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 2 states have internal predecessors, (22), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2022-03-17 15:50:49,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:50:49,842 INFO L225 Difference]: With dead ends: 61 [2022-03-17 15:50:49,842 INFO L226 Difference]: Without dead ends: 56 [2022-03-17 15:50:49,843 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 15:50:49,845 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 59 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:50:49,846 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 55 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:50:49,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-17 15:50:49,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-03-17 15:50:49,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 15:50:49,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-03-17 15:50:49,871 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 49 [2022-03-17 15:50:49,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:50:49,872 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-03-17 15:50:49,872 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 2 states have internal predecessors, (22), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-17 15:50:49,872 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-03-17 15:50:49,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-17 15:50:49,873 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:50:49,873 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:50:49,874 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 15:50:49,874 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:50:49,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:50:49,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1068751152, now seen corresponding path program 1 times [2022-03-17 15:50:49,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:50:49,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375710780] [2022-03-17 15:50:49,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:50:49,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:50:49,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:49,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:50:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:49,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:50:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:50,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 15:50:50,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:50,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 15:50:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:50,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-17 15:50:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:50,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:50:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:50,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 15:50:50,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:50,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-17 15:50:50,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 15:50:50,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:50:50,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375710780] [2022-03-17 15:50:50,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375710780] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:50:50,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635171698] [2022-03-17 15:50:50,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:50:50,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:50:50,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:50:50,174 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:50:50,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 15:50:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:50,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 15:50:50,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:50:50,418 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 15:50:50,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:50:50,725 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 15:50:50,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635171698] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:50:50,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:50:50,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 17 [2022-03-17 15:50:50,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880962459] [2022-03-17 15:50:50,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:50:50,727 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-17 15:50:50,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:50:50,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-17 15:50:50,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-17 15:50:50,728 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 17 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-03-17 15:50:51,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:50:51,072 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2022-03-17 15:50:51,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-17 15:50:51,073 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 49 [2022-03-17 15:50:51,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:50:51,074 INFO L225 Difference]: With dead ends: 66 [2022-03-17 15:50:51,074 INFO L226 Difference]: Without dead ends: 63 [2022-03-17 15:50:51,075 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2022-03-17 15:50:51,075 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 102 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 15:50:51,076 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 52 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 15:50:51,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-17 15:50:51,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2022-03-17 15:50:51,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 35 states have internal predecessors, (40), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 15:50:51,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2022-03-17 15:50:51,081 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 49 [2022-03-17 15:50:51,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:50:51,082 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2022-03-17 15:50:51,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-03-17 15:50:51,083 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2022-03-17 15:50:51,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-17 15:50:51,084 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:50:51,084 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:50:51,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 15:50:51,301 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:50:51,301 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:50:51,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:50:51,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1304641222, now seen corresponding path program 1 times [2022-03-17 15:50:51,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:50:51,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021067890] [2022-03-17 15:50:51,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:50:51,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:50:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:51,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:50:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:51,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:50:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:51,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 15:50:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:51,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 15:50:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:51,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-17 15:50:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:51,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:50:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:51,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 15:50:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:51,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-17 15:50:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:51,420 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 15:50:51,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:50:51,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021067890] [2022-03-17 15:50:51,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021067890] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:50:51,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:50:51,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-17 15:50:51,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200062298] [2022-03-17 15:50:51,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:50:51,423 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 15:50:51,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:50:51,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 15:50:51,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-17 15:50:51,424 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-17 15:50:51,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:50:51,705 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2022-03-17 15:50:51,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 15:50:51,706 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 50 [2022-03-17 15:50:51,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:50:51,707 INFO L225 Difference]: With dead ends: 73 [2022-03-17 15:50:51,707 INFO L226 Difference]: Without dead ends: 73 [2022-03-17 15:50:51,708 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-17 15:50:51,708 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 84 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 15:50:51,709 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 57 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 15:50:51,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-17 15:50:51,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2022-03-17 15:50:51,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-17 15:50:51,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-03-17 15:50:51,719 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 50 [2022-03-17 15:50:51,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:50:51,719 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-03-17 15:50:51,719 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-17 15:50:51,719 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-03-17 15:50:51,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-17 15:50:51,720 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:50:51,720 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:50:51,721 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-17 15:50:51,721 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:50:51,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:50:51,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1610834198, now seen corresponding path program 1 times [2022-03-17 15:50:51,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:50:51,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282938684] [2022-03-17 15:50:51,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:50:51,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:50:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:51,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:50:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:51,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:50:51,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:51,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 15:50:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:51,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 15:50:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:51,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-17 15:50:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:51,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:50:51,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:51,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 15:50:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:51,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-17 15:50:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:52,036 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 15:50:52,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:50:52,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282938684] [2022-03-17 15:50:52,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282938684] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:50:52,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746550348] [2022-03-17 15:50:52,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:50:52,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:50:52,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:50:52,042 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:50:52,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 15:50:52,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:52,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-17 15:50:52,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:50:52,303 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 15:50:52,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:50:52,738 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 15:50:52,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746550348] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:50:52,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:50:52,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15, 12] total 25 [2022-03-17 15:50:52,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966232004] [2022-03-17 15:50:52,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:50:52,739 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-17 15:50:52,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:50:52,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-17 15:50:52,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-17 15:50:52,740 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 12 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-17 15:50:52,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:50:52,846 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2022-03-17 15:50:52,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 15:50:52,846 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 52 [2022-03-17 15:50:52,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:50:52,849 INFO L225 Difference]: With dead ends: 80 [2022-03-17 15:50:52,849 INFO L226 Difference]: Without dead ends: 70 [2022-03-17 15:50:52,850 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-03-17 15:50:52,852 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 42 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:50:52,853 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 412 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:50:52,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-17 15:50:52,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2022-03-17 15:50:52,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-17 15:50:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2022-03-17 15:50:52,869 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 52 [2022-03-17 15:50:52,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:50:52,869 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2022-03-17 15:50:52,869 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-17 15:50:52,869 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2022-03-17 15:50:52,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-17 15:50:52,870 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:50:52,870 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:50:52,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 15:50:53,070 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-17 15:50:53,071 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:50:53,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:50:53,071 INFO L85 PathProgramCache]: Analyzing trace with hash -58927682, now seen corresponding path program 1 times [2022-03-17 15:50:53,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:50:53,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252968540] [2022-03-17 15:50:53,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:50:53,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:50:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:53,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:50:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:53,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:50:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:53,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 15:50:53,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:53,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 15:50:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:53,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-17 15:50:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:53,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:50:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:53,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 15:50:53,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:53,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-17 15:50:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 15:50:53,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:50:53,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252968540] [2022-03-17 15:50:53,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252968540] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:50:53,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852876680] [2022-03-17 15:50:53,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:50:53,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:50:53,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:50:53,165 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:50:53,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 15:50:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:53,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-17 15:50:53,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:50:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 15:50:53,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:50:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 15:50:53,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852876680] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:50:53,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:50:53,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 7 [2022-03-17 15:50:53,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201178727] [2022-03-17 15:50:53,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:50:53,391 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-17 15:50:53,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:50:53,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-17 15:50:53,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-03-17 15:50:53,391 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-17 15:50:53,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:50:53,531 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2022-03-17 15:50:53,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 15:50:53,532 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 55 [2022-03-17 15:50:53,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:50:53,532 INFO L225 Difference]: With dead ends: 67 [2022-03-17 15:50:53,532 INFO L226 Difference]: Without dead ends: 67 [2022-03-17 15:50:53,533 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-03-17 15:50:53,533 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 66 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:50:53,533 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 51 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:50:53,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-17 15:50:53,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-17 15:50:53,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 45 states have internal predecessors, (50), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-17 15:50:53,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2022-03-17 15:50:53,537 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 55 [2022-03-17 15:50:53,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:50:53,537 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2022-03-17 15:50:53,537 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-17 15:50:53,537 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2022-03-17 15:50:53,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-17 15:50:53,538 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:50:53,538 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:50:53,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 15:50:53,743 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:50:53,744 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:50:53,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:50:53,744 INFO L85 PathProgramCache]: Analyzing trace with hash 925124550, now seen corresponding path program 1 times [2022-03-17 15:50:53,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:50:53,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467304747] [2022-03-17 15:50:53,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:50:53,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:50:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:53,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:50:53,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:53,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:50:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:53,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 15:50:53,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:53,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 15:50:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:53,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-17 15:50:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:53,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:50:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:53,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 15:50:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:53,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-17 15:50:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:54,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-17 15:50:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:54,026 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 15:50:54,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:50:54,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467304747] [2022-03-17 15:50:54,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467304747] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:50:54,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930205272] [2022-03-17 15:50:54,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:50:54,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:50:54,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:50:54,044 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:50:54,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 15:50:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:54,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-17 15:50:54,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:50:54,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-17 15:50:54,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-03-17 15:50:54,278 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-03-17 15:50:54,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-03-17 15:50:54,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-03-17 15:50:54,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-03-17 15:50:54,391 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 15:50:54,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 15:50:54,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930205272] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:50:54,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 15:50:54,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 25 [2022-03-17 15:50:54,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051577828] [2022-03-17 15:50:54,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:50:54,392 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 15:50:54,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:50:54,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 15:50:54,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2022-03-17 15:50:54,393 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-17 15:50:54,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:50:54,567 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2022-03-17 15:50:54,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 15:50:54,568 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 57 [2022-03-17 15:50:54,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:50:54,569 INFO L225 Difference]: With dead ends: 83 [2022-03-17 15:50:54,569 INFO L226 Difference]: Without dead ends: 83 [2022-03-17 15:50:54,569 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-03-17 15:50:54,570 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 50 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:50:54,570 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 441 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:50:54,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-17 15:50:54,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2022-03-17 15:50:54,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 50 states have internal predecessors, (56), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-17 15:50:54,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2022-03-17 15:50:54,574 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 57 [2022-03-17 15:50:54,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:50:54,574 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2022-03-17 15:50:54,574 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-17 15:50:54,574 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2022-03-17 15:50:54,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-17 15:50:54,575 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:50:54,575 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:50:54,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 15:50:54,793 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:50:54,793 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:50:54,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:50:54,793 INFO L85 PathProgramCache]: Analyzing trace with hash 926048071, now seen corresponding path program 1 times [2022-03-17 15:50:54,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:50:54,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083636834] [2022-03-17 15:50:54,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:50:54,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:50:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:54,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:50:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:54,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:50:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:54,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 15:50:54,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:54,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 15:50:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:54,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-17 15:50:54,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:54,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:50:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:54,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 15:50:54,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:54,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-17 15:50:54,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:54,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-17 15:50:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:54,938 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 15:50:54,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:50:54,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083636834] [2022-03-17 15:50:54,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083636834] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:50:54,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:50:54,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-17 15:50:54,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073414980] [2022-03-17 15:50:54,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:50:54,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-17 15:50:54,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:50:54,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-17 15:50:54,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-03-17 15:50:54,940 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-17 15:50:55,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:50:55,286 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2022-03-17 15:50:55,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 15:50:55,287 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 57 [2022-03-17 15:50:55,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:50:55,288 INFO L225 Difference]: With dead ends: 92 [2022-03-17 15:50:55,288 INFO L226 Difference]: Without dead ends: 92 [2022-03-17 15:50:55,288 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-03-17 15:50:55,289 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 111 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 15:50:55,289 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 56 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 15:50:55,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-17 15:50:55,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2022-03-17 15:50:55,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 57 states have internal predecessors, (65), 17 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (17), 16 states have call predecessors, (17), 15 states have call successors, (17) [2022-03-17 15:50:55,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2022-03-17 15:50:55,292 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 57 [2022-03-17 15:50:55,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:50:55,293 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2022-03-17 15:50:55,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-17 15:50:55,293 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2022-03-17 15:50:55,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-17 15:50:55,294 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:50:55,294 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:50:55,294 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-17 15:50:55,294 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:50:55,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:50:55,294 INFO L85 PathProgramCache]: Analyzing trace with hash -984079512, now seen corresponding path program 2 times [2022-03-17 15:50:55,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:50:55,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326099265] [2022-03-17 15:50:55,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:50:55,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:50:55,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:55,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:50:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:55,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:50:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:55,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 15:50:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:55,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 15:50:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:55,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-17 15:50:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:55,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:50:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:55,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 15:50:55,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:55,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-17 15:50:55,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:55,947 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-17 15:50:55,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:50:55,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326099265] [2022-03-17 15:50:55,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326099265] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:50:55,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968053183] [2022-03-17 15:50:55,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 15:50:55,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:50:55,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:50:55,949 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:50:55,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 15:50:56,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 15:50:56,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:50:56,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-17 15:50:56,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:50:56,211 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-03-17 15:50:56,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-03-17 15:51:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-17 15:51:03,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:51:03,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968053183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:51:03,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:51:03,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 33 [2022-03-17 15:51:03,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360137607] [2022-03-17 15:51:03,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 15:51:03,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-17 15:51:03,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:51:03,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-17 15:51:03,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1026, Unknown=4, NotChecked=0, Total=1122 [2022-03-17 15:51:03,676 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand has 33 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 12 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-03-17 15:51:04,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:51:04,675 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2022-03-17 15:51:04,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-17 15:51:04,675 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 12 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) Word has length 58 [2022-03-17 15:51:04,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:51:04,676 INFO L225 Difference]: With dead ends: 99 [2022-03-17 15:51:04,676 INFO L226 Difference]: Without dead ends: 96 [2022-03-17 15:51:04,677 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=258, Invalid=2708, Unknown=4, NotChecked=0, Total=2970 [2022-03-17 15:51:04,677 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 61 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 378 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 15:51:04,677 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 245 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 911 Invalid, 0 Unknown, 378 Unchecked, 0.4s Time] [2022-03-17 15:51:04,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-17 15:51:04,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2022-03-17 15:51:04,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 63 states have internal predecessors, (74), 17 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (17), 16 states have call predecessors, (17), 15 states have call successors, (17) [2022-03-17 15:51:04,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2022-03-17 15:51:04,681 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 58 [2022-03-17 15:51:04,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:51:04,681 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2022-03-17 15:51:04,681 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 12 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-03-17 15:51:04,681 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2022-03-17 15:51:04,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-17 15:51:04,682 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:51:04,682 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:51:04,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-17 15:51:04,885 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:51:04,885 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:51:04,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:51:04,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1828813328, now seen corresponding path program 3 times [2022-03-17 15:51:04,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:51:04,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823025234] [2022-03-17 15:51:04,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:04,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:51:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:04,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:51:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:04,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:51:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:04,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 15:51:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:04,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 15:51:04,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:04,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-17 15:51:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:04,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:51:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:04,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 15:51:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:04,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-17 15:51:04,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:04,980 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 15:51:04,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:51:04,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823025234] [2022-03-17 15:51:04,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823025234] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:51:04,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888042342] [2022-03-17 15:51:04,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 15:51:04,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:51:04,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:51:04,983 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:51:04,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 15:51:05,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-17 15:51:05,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:51:05,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-17 15:51:05,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:51:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 15:51:05,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:51:05,227 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 15:51:05,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888042342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:51:05,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:51:05,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 10 [2022-03-17 15:51:05,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416973260] [2022-03-17 15:51:05,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:51:05,229 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 15:51:05,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:51:05,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 15:51:05,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-17 15:51:05,229 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-17 15:51:05,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:51:05,543 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2022-03-17 15:51:05,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 15:51:05,543 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 61 [2022-03-17 15:51:05,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:51:05,544 INFO L225 Difference]: With dead ends: 101 [2022-03-17 15:51:05,544 INFO L226 Difference]: Without dead ends: 101 [2022-03-17 15:51:05,544 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2022-03-17 15:51:05,545 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 71 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 15:51:05,545 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 57 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 15:51:05,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-17 15:51:05,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2022-03-17 15:51:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 69 states have internal predecessors, (82), 17 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (17), 16 states have call predecessors, (17), 15 states have call successors, (17) [2022-03-17 15:51:05,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2022-03-17 15:51:05,548 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 61 [2022-03-17 15:51:05,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:51:05,548 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2022-03-17 15:51:05,548 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-17 15:51:05,549 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2022-03-17 15:51:05,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-17 15:51:05,549 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:51:05,549 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:51:05,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 15:51:05,763 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:51:05,763 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:51:05,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:51:05,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1290066965, now seen corresponding path program 1 times [2022-03-17 15:51:05,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:51:05,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655548264] [2022-03-17 15:51:05,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:05,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:51:05,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:05,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:51:05,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:05,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:51:05,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:05,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 15:51:05,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:05,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 15:51:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:05,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-17 15:51:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:05,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:51:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:05,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 15:51:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:05,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-17 15:51:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:05,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-17 15:51:05,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:05,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-17 15:51:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:05,880 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-17 15:51:05,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:51:05,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655548264] [2022-03-17 15:51:05,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655548264] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:51:05,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:51:05,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-17 15:51:05,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839326660] [2022-03-17 15:51:05,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:51:05,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 15:51:05,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:51:05,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 15:51:05,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-03-17 15:51:05,881 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-17 15:51:06,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:51:06,230 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2022-03-17 15:51:06,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 15:51:06,230 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 64 [2022-03-17 15:51:06,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:51:06,231 INFO L225 Difference]: With dead ends: 109 [2022-03-17 15:51:06,231 INFO L226 Difference]: Without dead ends: 109 [2022-03-17 15:51:06,231 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-03-17 15:51:06,232 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 82 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 15:51:06,232 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 56 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 15:51:06,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-17 15:51:06,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2022-03-17 15:51:06,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 75 states have internal predecessors, (88), 19 states have call successors, (19), 10 states have call predecessors, (19), 11 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-03-17 15:51:06,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2022-03-17 15:51:06,235 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 64 [2022-03-17 15:51:06,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:51:06,236 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2022-03-17 15:51:06,236 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-17 15:51:06,236 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2022-03-17 15:51:06,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-17 15:51:06,236 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:51:06,236 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:51:06,237 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-17 15:51:06,237 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:51:06,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:51:06,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1289143444, now seen corresponding path program 1 times [2022-03-17 15:51:06,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:51:06,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386630620] [2022-03-17 15:51:06,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:06,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:51:06,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:06,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:51:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:06,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:51:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:06,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 15:51:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:06,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 15:51:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:06,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-17 15:51:06,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:06,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:51:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:06,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 15:51:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:06,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-17 15:51:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:06,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-17 15:51:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:06,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-17 15:51:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-17 15:51:06,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:51:06,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386630620] [2022-03-17 15:51:06,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386630620] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:51:06,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:51:06,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-17 15:51:06,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383512303] [2022-03-17 15:51:06,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:51:06,338 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 15:51:06,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:51:06,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 15:51:06,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-17 15:51:06,339 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-17 15:51:06,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:51:06,589 INFO L93 Difference]: Finished difference Result 107 states and 130 transitions. [2022-03-17 15:51:06,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 15:51:06,589 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 64 [2022-03-17 15:51:06,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:51:06,590 INFO L225 Difference]: With dead ends: 107 [2022-03-17 15:51:06,590 INFO L226 Difference]: Without dead ends: 107 [2022-03-17 15:51:06,590 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-17 15:51:06,591 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 77 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 15:51:06,591 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 50 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 15:51:06,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-17 15:51:06,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2022-03-17 15:51:06,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 75 states have internal predecessors, (87), 19 states have call successors, (19), 10 states have call predecessors, (19), 11 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-03-17 15:51:06,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 125 transitions. [2022-03-17 15:51:06,594 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 125 transitions. Word has length 64 [2022-03-17 15:51:06,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:51:06,594 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 125 transitions. [2022-03-17 15:51:06,594 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-17 15:51:06,594 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 125 transitions. [2022-03-17 15:51:06,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-17 15:51:06,595 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:51:06,595 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:51:06,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-17 15:51:06,595 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:51:06,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:51:06,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1636548555, now seen corresponding path program 1 times [2022-03-17 15:51:06,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:51:06,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137349992] [2022-03-17 15:51:06,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:06,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:51:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:06,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:51:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:06,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:51:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:06,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 15:51:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:06,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 15:51:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:06,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-17 15:51:06,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:06,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:51:06,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:06,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 15:51:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:06,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-17 15:51:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:06,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-17 15:51:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:06,664 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 15:51:06,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:51:06,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137349992] [2022-03-17 15:51:06,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137349992] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:51:06,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99008403] [2022-03-17 15:51:06,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:06,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:51:06,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:51:06,665 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:51:06,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 15:51:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:06,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-17 15:51:06,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:51:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-17 15:51:06,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:51:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 15:51:06,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99008403] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:51:06,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:51:06,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 9 [2022-03-17 15:51:06,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454876292] [2022-03-17 15:51:06,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:51:06,918 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 15:51:06,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:51:06,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 15:51:06,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-17 15:51:06,919 INFO L87 Difference]: Start difference. First operand 103 states and 125 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-17 15:51:07,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:51:07,142 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2022-03-17 15:51:07,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-17 15:51:07,142 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 63 [2022-03-17 15:51:07,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:51:07,143 INFO L225 Difference]: With dead ends: 116 [2022-03-17 15:51:07,143 INFO L226 Difference]: Without dead ends: 112 [2022-03-17 15:51:07,143 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-03-17 15:51:07,143 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 89 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 15:51:07,143 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 54 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 15:51:07,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-17 15:51:07,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 100. [2022-03-17 15:51:07,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.173913043478261) internal successors, (81), 72 states have internal predecessors, (81), 19 states have call successors, (19), 10 states have call predecessors, (19), 11 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-03-17 15:51:07,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 119 transitions. [2022-03-17 15:51:07,147 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 119 transitions. Word has length 63 [2022-03-17 15:51:07,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:51:07,147 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 119 transitions. [2022-03-17 15:51:07,147 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-17 15:51:07,147 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 119 transitions. [2022-03-17 15:51:07,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-17 15:51:07,147 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:51:07,148 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:51:07,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 15:51:07,355 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:51:07,356 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:51:07,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:51:07,356 INFO L85 PathProgramCache]: Analyzing trace with hash 937349773, now seen corresponding path program 2 times [2022-03-17 15:51:07,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:51:07,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801131209] [2022-03-17 15:51:07,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:07,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:51:07,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:07,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:51:07,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:07,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:51:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:07,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 15:51:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:07,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 15:51:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:07,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-17 15:51:07,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:07,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:51:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:07,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 15:51:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:07,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-17 15:51:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:07,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-17 15:51:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:07,526 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-17 15:51:07,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:51:07,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801131209] [2022-03-17 15:51:07,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801131209] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:51:07,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:51:07,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-17 15:51:07,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255086270] [2022-03-17 15:51:07,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:51:07,527 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-17 15:51:07,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:51:07,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-17 15:51:07,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-03-17 15:51:07,528 INFO L87 Difference]: Start difference. First operand 100 states and 119 transitions. Second operand has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-17 15:51:07,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:51:07,940 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2022-03-17 15:51:07,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-17 15:51:07,941 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2022-03-17 15:51:07,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:51:07,941 INFO L225 Difference]: With dead ends: 108 [2022-03-17 15:51:07,941 INFO L226 Difference]: Without dead ends: 108 [2022-03-17 15:51:07,942 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-03-17 15:51:07,942 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 85 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 15:51:07,942 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 65 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 15:51:07,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-17 15:51:07,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 90. [2022-03-17 15:51:07,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 64 states have internal predecessors, (71), 17 states have call successors, (17), 10 states have call predecessors, (17), 10 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-17 15:51:07,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 104 transitions. [2022-03-17 15:51:07,945 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 104 transitions. Word has length 66 [2022-03-17 15:51:07,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:51:07,945 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 104 transitions. [2022-03-17 15:51:07,945 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-17 15:51:07,945 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 104 transitions. [2022-03-17 15:51:07,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-17 15:51:07,946 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:51:07,946 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:51:07,946 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-17 15:51:07,946 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:51:07,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:51:07,946 INFO L85 PathProgramCache]: Analyzing trace with hash -455253687, now seen corresponding path program 1 times [2022-03-17 15:51:07,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:51:07,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350865074] [2022-03-17 15:51:07,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:07,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:51:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:08,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:51:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:08,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:51:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:08,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 15:51:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:08,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 15:51:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:08,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-17 15:51:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:08,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:51:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:08,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 15:51:08,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:08,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-17 15:51:08,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:08,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-17 15:51:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:08,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-17 15:51:08,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:08,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-17 15:51:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-17 15:51:08,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:51:08,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350865074] [2022-03-17 15:51:08,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350865074] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:51:08,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955348496] [2022-03-17 15:51:08,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:08,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:51:08,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:51:08,160 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:51:08,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 15:51:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:08,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-17 15:51:08,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:51:08,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-17 15:51:08,368 INFO L356 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-03-17 15:51:08,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2022-03-17 15:51:08,392 INFO L356 Elim1Store]: treesize reduction 35, result has 34.0 percent of original size [2022-03-17 15:51:08,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 71 [2022-03-17 15:51:08,397 INFO L390 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-17 15:51:08,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 17 [2022-03-17 15:51:08,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-03-17 15:51:08,478 INFO L390 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-17 15:51:08,499 INFO L390 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 0 case distinctions, treesize of input 36 treesize of output 32 [2022-03-17 15:51:08,518 INFO L390 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-17 15:51:08,801 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-17 15:51:08,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-17 15:51:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-17 15:51:08,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:51:08,988 INFO L356 Elim1Store]: treesize reduction 28, result has 33.3 percent of original size [2022-03-17 15:51:08,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 56 treesize of output 52 [2022-03-17 15:51:08,992 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-17 15:51:08,993 INFO L390 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 42 [2022-03-17 15:51:08,998 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-17 15:51:08,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 67 [2022-03-17 15:51:09,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 75 [2022-03-17 15:51:09,006 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-17 15:51:09,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 57 [2022-03-17 15:51:09,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-03-17 15:51:09,075 INFO L356 Elim1Store]: treesize reduction 13, result has 69.0 percent of original size [2022-03-17 15:51:09,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 94 treesize of output 87 [2022-03-17 15:51:09,107 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-17 15:51:09,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 195 treesize of output 215 [2022-03-17 15:51:09,133 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-17 15:51:09,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 219 treesize of output 216 [2022-03-17 15:51:09,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-17 15:51:09,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-17 15:51:09,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-03-17 15:51:09,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-03-17 15:51:09,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-03-17 15:51:09,517 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-17 15:51:09,517 INFO L390 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 15 treesize of output 11 [2022-03-17 15:51:09,578 INFO L356 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-03-17 15:51:09,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 1 [2022-03-17 15:51:09,661 INFO L356 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2022-03-17 15:51:09,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 84 [2022-03-17 15:51:09,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-17 15:51:09,752 INFO L390 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 7 treesize of output 1 [2022-03-17 15:51:09,950 INFO L356 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2022-03-17 15:51:09,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 146 treesize of output 153 [2022-03-17 15:51:10,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-17 15:51:10,083 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-17 15:51:10,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 60 [2022-03-17 15:51:10,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-17 15:51:10,364 INFO L390 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 7 treesize of output 1 [2022-03-17 15:51:10,377 INFO L390 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 7 treesize of output 1 [2022-03-17 15:51:10,392 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-17 15:51:10,392 INFO L390 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 7 treesize of output 6 [2022-03-17 15:51:10,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-17 15:51:10,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-17 15:51:10,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-17 15:51:10,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-17 15:51:10,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-17 15:51:10,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-03-17 15:51:10,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-17 15:51:10,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-03-17 15:51:10,626 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-17 15:51:10,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 54 [2022-03-17 15:51:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-17 15:51:10,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955348496] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:51:10,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:51:10,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16, 11] total 27 [2022-03-17 15:51:10,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099294535] [2022-03-17 15:51:10,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:51:10,926 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 15:51:10,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:51:10,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 15:51:10,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-03-17 15:51:10,927 INFO L87 Difference]: Start difference. First operand 90 states and 104 transitions. Second operand has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-17 15:51:11,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:51:11,067 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2022-03-17 15:51:11,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 15:51:11,068 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2022-03-17 15:51:11,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:51:11,068 INFO L225 Difference]: With dead ends: 108 [2022-03-17 15:51:11,068 INFO L226 Difference]: Without dead ends: 108 [2022-03-17 15:51:11,069 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 143 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2022-03-17 15:51:11,069 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 36 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:51:11,069 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 465 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:51:11,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-17 15:51:11,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2022-03-17 15:51:11,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 72 states have (on average 1.125) internal successors, (81), 75 states have internal predecessors, (81), 21 states have call successors, (21), 11 states have call predecessors, (21), 12 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-03-17 15:51:11,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2022-03-17 15:51:11,072 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 70 [2022-03-17 15:51:11,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:51:11,072 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2022-03-17 15:51:11,072 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-17 15:51:11,072 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2022-03-17 15:51:11,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-17 15:51:11,073 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:51:11,073 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:51:11,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 15:51:11,274 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-17 15:51:11,274 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:51:11,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:51:11,274 INFO L85 PathProgramCache]: Analyzing trace with hash -633726750, now seen corresponding path program 4 times [2022-03-17 15:51:11,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:51:11,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372359374] [2022-03-17 15:51:11,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:11,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:51:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:11,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:51:11,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:11,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:51:11,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:11,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 15:51:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:11,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 15:51:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:12,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-17 15:51:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:12,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:51:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:12,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 15:51:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:12,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-17 15:51:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:14,521 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-17 15:51:14,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:51:14,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372359374] [2022-03-17 15:51:14,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372359374] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:51:14,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254026778] [2022-03-17 15:51:14,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 15:51:14,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:51:14,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:51:14,523 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:51:14,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 15:51:14,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 15:51:14,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:51:14,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-17 15:51:14,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:51:14,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-03-17 15:51:18,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-03-17 15:51:30,376 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-17 15:51:30,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:51:30,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254026778] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:51:30,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:51:30,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 46 [2022-03-17 15:51:30,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589548017] [2022-03-17 15:51:30,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 15:51:30,529 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-17 15:51:30,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:51:30,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-17 15:51:30,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1959, Unknown=11, NotChecked=0, Total=2162 [2022-03-17 15:51:30,530 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand has 46 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 39 states have internal predecessors, (68), 9 states have call successors, (16), 4 states have call predecessors, (16), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2022-03-17 15:51:56,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:51:56,026 INFO L93 Difference]: Finished difference Result 149 states and 176 transitions. [2022-03-17 15:51:56,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-17 15:51:56,026 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 39 states have internal predecessors, (68), 9 states have call successors, (16), 4 states have call predecessors, (16), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) Word has length 67 [2022-03-17 15:51:56,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:51:56,027 INFO L225 Difference]: With dead ends: 149 [2022-03-17 15:51:56,027 INFO L226 Difference]: Without dead ends: 133 [2022-03-17 15:51:56,029 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1713 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=550, Invalid=5745, Unknown=25, NotChecked=0, Total=6320 [2022-03-17 15:51:56,029 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 148 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 1646 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-17 15:51:56,029 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 224 Invalid, 1946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1646 Invalid, 0 Unknown, 190 Unchecked, 1.4s Time] [2022-03-17 15:51:56,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-17 15:51:56,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 115. [2022-03-17 15:51:56,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 81 states have (on average 1.1481481481481481) internal successors, (93), 84 states have internal predecessors, (93), 21 states have call successors, (21), 11 states have call predecessors, (21), 12 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-03-17 15:51:56,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 135 transitions. [2022-03-17 15:51:56,033 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 135 transitions. Word has length 67 [2022-03-17 15:51:56,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:51:56,033 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 135 transitions. [2022-03-17 15:51:56,033 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 39 states have internal predecessors, (68), 9 states have call successors, (16), 4 states have call predecessors, (16), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2022-03-17 15:51:56,033 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 135 transitions. [2022-03-17 15:51:56,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-17 15:51:56,034 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:51:56,034 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:51:56,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 15:51:56,244 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-17 15:51:56,244 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:51:56,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:51:56,245 INFO L85 PathProgramCache]: Analyzing trace with hash -516817935, now seen corresponding path program 1 times [2022-03-17 15:51:56,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:51:56,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837739559] [2022-03-17 15:51:56,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:56,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:51:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:56,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:51:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:56,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:51:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:56,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 15:51:56,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:56,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 15:51:56,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:56,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-17 15:51:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:56,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:51:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:56,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 15:51:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:56,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-17 15:51:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:56,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-17 15:51:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:56,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-17 15:51:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:56,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-17 15:51:56,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:56,480 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-17 15:51:56,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:51:56,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837739559] [2022-03-17 15:51:56,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837739559] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:51:56,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610590479] [2022-03-17 15:51:56,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:56,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:51:56,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:51:56,496 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:51:56,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 15:51:56,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:56,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-17 15:51:56,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:51:56,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-17 15:51:56,776 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-03-17 15:51:56,776 INFO L390 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 1 case distinctions, treesize of input 27 treesize of output 23 [2022-03-17 15:51:57,063 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-17 15:51:57,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-17 15:51:57,113 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-17 15:51:57,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:51:57,280 INFO L356 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-03-17 15:51:57,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 670 treesize of output 606 [2022-03-17 15:51:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-17 15:51:57,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610590479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:51:57,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:51:57,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 11] total 31 [2022-03-17 15:51:57,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142297170] [2022-03-17 15:51:57,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:51:57,643 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-17 15:51:57,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:51:57,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-17 15:51:57,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-03-17 15:51:57,643 INFO L87 Difference]: Start difference. First operand 115 states and 135 transitions. Second operand has 31 states, 25 states have (on average 2.92) internal successors, (73), 27 states have internal predecessors, (73), 10 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (18), 5 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-17 15:51:59,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:51:59,131 INFO L93 Difference]: Finished difference Result 179 states and 209 transitions. [2022-03-17 15:51:59,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-17 15:51:59,131 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 2.92) internal successors, (73), 27 states have internal predecessors, (73), 10 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (18), 5 states have call predecessors, (18), 8 states have call successors, (18) Word has length 73 [2022-03-17 15:51:59,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:51:59,135 INFO L225 Difference]: With dead ends: 179 [2022-03-17 15:51:59,136 INFO L226 Difference]: Without dead ends: 179 [2022-03-17 15:51:59,137 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 150 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=430, Invalid=3230, Unknown=0, NotChecked=0, Total=3660 [2022-03-17 15:51:59,137 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 199 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-17 15:51:59,139 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 84 Invalid, 1963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1664 Invalid, 0 Unknown, 127 Unchecked, 0.7s Time] [2022-03-17 15:51:59,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-17 15:51:59,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 139. [2022-03-17 15:51:59,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 98 states have (on average 1.1428571428571428) internal successors, (112), 102 states have internal predecessors, (112), 24 states have call successors, (24), 14 states have call predecessors, (24), 16 states have return successors, (25), 22 states have call predecessors, (25), 22 states have call successors, (25) [2022-03-17 15:51:59,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 161 transitions. [2022-03-17 15:51:59,164 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 161 transitions. Word has length 73 [2022-03-17 15:51:59,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:51:59,164 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 161 transitions. [2022-03-17 15:51:59,164 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 2.92) internal successors, (73), 27 states have internal predecessors, (73), 10 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (18), 5 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-17 15:51:59,164 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 161 transitions. [2022-03-17 15:51:59,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-17 15:51:59,165 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:51:59,165 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:51:59,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-17 15:51:59,365 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-17 15:51:59,365 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:51:59,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:51:59,366 INFO L85 PathProgramCache]: Analyzing trace with hash -2020932442, now seen corresponding path program 1 times [2022-03-17 15:51:59,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:51:59,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934083509] [2022-03-17 15:51:59,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:59,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:51:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:59,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:51:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:59,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:51:59,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:59,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 15:51:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:59,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 15:51:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:59,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-17 15:51:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:59,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:51:59,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:59,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 15:51:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:59,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-17 15:51:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:59,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-17 15:51:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:59,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-17 15:51:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:59,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-17 15:51:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:59,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-17 15:51:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:59,735 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-17 15:51:59,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:51:59,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934083509] [2022-03-17 15:51:59,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934083509] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:51:59,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881398586] [2022-03-17 15:51:59,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:59,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:51:59,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:51:59,737 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:51:59,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-17 15:51:59,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:59,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 118 conjunts are in the unsatisfiable core [2022-03-17 15:51:59,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:51:59,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-03-17 15:51:59,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-17 15:52:02,122 WARN L855 $PredicateComparison]: unable to prove that (exists ((mkdup_~j~0 Int) (mkdup_~x~0 Int) (mkdup_~i~0 Int)) (and (<= 0 mkdup_~j~0) (not (= mkdup_~j~0 mkdup_~i~0)) (= (store |c_old(#memory_int)| |c_mkdup_#in~a.base| (store (store (select |c_old(#memory_int)| |c_mkdup_#in~a.base|) (+ |c_mkdup_#in~a.offset| (* mkdup_~i~0 4)) mkdup_~x~0) (+ (* mkdup_~j~0 4) |c_mkdup_#in~a.offset|) mkdup_~x~0)) |c_#memory_int|) (<= 0 mkdup_~i~0))) is different from true [2022-03-17 15:52:02,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-03-17 15:52:06,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-17 15:52:08,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-17 15:52:08,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 52 [2022-03-17 15:52:08,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-17 15:52:08,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-17 15:52:08,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 52 [2022-03-17 15:52:08,583 INFO L390 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-17 15:52:08,589 INFO L390 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-17 15:53:02,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-17 15:53:02,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-17 15:53:02,300 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-17 15:53:02,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 47 [2022-03-17 15:53:02,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-17 15:53:02,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-17 15:53:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-17 15:53:02,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:53:17,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-17 15:53:17,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-17 15:53:25,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881398586] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:53:25,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:53:25,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25] total 39 [2022-03-17 15:53:25,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312898423] [2022-03-17 15:53:25,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 15:53:25,914 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-17 15:53:25,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:53:25,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-17 15:53:25,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2160, Unknown=23, NotChecked=94, Total=2450 [2022-03-17 15:53:25,915 INFO L87 Difference]: Start difference. First operand 139 states and 161 transitions. Second operand has 39 states, 31 states have (on average 2.032258064516129) internal successors, (63), 29 states have internal predecessors, (63), 13 states have call successors, (26), 6 states have call predecessors, (26), 8 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2022-03-17 15:54:25,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:54:25,845 INFO L93 Difference]: Finished difference Result 187 states and 214 transitions. [2022-03-17 15:54:25,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-17 15:54:25,845 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 31 states have (on average 2.032258064516129) internal successors, (63), 29 states have internal predecessors, (63), 13 states have call successors, (26), 6 states have call predecessors, (26), 8 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) Word has length 76 [2022-03-17 15:54:25,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:54:25,846 INFO L225 Difference]: With dead ends: 187 [2022-03-17 15:54:25,846 INFO L226 Difference]: Without dead ends: 119 [2022-03-17 15:54:25,847 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 99 SyntacticMatches, 10 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 141.7s TimeCoverageRelationStatistics Valid=392, Invalid=4963, Unknown=51, NotChecked=144, Total=5550 [2022-03-17 15:54:25,847 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 91 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 1419 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-17 15:54:25,847 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 215 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1419 Invalid, 0 Unknown, 234 Unchecked, 0.7s Time] [2022-03-17 15:54:25,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-17 15:54:25,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2022-03-17 15:54:25,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 85 states have internal predecessors, (93), 21 states have call successors, (21), 11 states have call predecessors, (21), 12 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-03-17 15:54:25,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 135 transitions. [2022-03-17 15:54:25,851 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 135 transitions. Word has length 76 [2022-03-17 15:54:25,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:54:25,851 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 135 transitions. [2022-03-17 15:54:25,851 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 31 states have (on average 2.032258064516129) internal successors, (63), 29 states have internal predecessors, (63), 13 states have call successors, (26), 6 states have call predecessors, (26), 8 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2022-03-17 15:54:25,852 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 135 transitions. [2022-03-17 15:54:25,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-17 15:54:25,852 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:54:25,852 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:54:25,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-17 15:54:26,063 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-17 15:54:26,063 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:54:26,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:54:26,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1723575464, now seen corresponding path program 5 times [2022-03-17 15:54:26,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:54:26,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131785645] [2022-03-17 15:54:26,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:54:26,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:54:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:26,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:54:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:26,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:54:26,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:26,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 15:54:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:26,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 15:54:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:26,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-17 15:54:26,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:26,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:54:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:26,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 15:54:26,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:26,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-17 15:54:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:26,166 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 43 proven. 15 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-17 15:54:26,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:54:26,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131785645] [2022-03-17 15:54:26,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131785645] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:54:26,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062789416] [2022-03-17 15:54:26,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 15:54:26,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:54:26,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:54:26,168 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:54:26,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-17 15:54:26,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-17 15:54:26,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:54:26,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-17 15:54:26,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:54:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 43 proven. 15 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-17 15:54:26,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:54:26,462 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 43 proven. 15 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-17 15:54:26,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062789416] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:54:26,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:54:26,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 11 [2022-03-17 15:54:26,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163505590] [2022-03-17 15:54:26,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:54:26,463 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 15:54:26,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:54:26,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 15:54:26,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-17 15:54:26,464 INFO L87 Difference]: Start difference. First operand 116 states and 135 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 9 states have internal predecessors, (46), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-17 15:54:26,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:54:26,795 INFO L93 Difference]: Finished difference Result 143 states and 166 transitions. [2022-03-17 15:54:26,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-17 15:54:26,795 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 9 states have internal predecessors, (46), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 76 [2022-03-17 15:54:26,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:54:26,796 INFO L225 Difference]: With dead ends: 143 [2022-03-17 15:54:26,796 INFO L226 Difference]: Without dead ends: 141 [2022-03-17 15:54:26,796 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2022-03-17 15:54:26,797 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 110 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 15:54:26,797 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 57 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 15:54:26,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-17 15:54:26,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 131. [2022-03-17 15:54:26,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 97 states have (on average 1.1443298969072164) internal successors, (111), 100 states have internal predecessors, (111), 21 states have call successors, (21), 11 states have call predecessors, (21), 12 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-03-17 15:54:26,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 153 transitions. [2022-03-17 15:54:26,800 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 153 transitions. Word has length 76 [2022-03-17 15:54:26,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:54:26,801 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 153 transitions. [2022-03-17 15:54:26,801 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 9 states have internal predecessors, (46), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-17 15:54:26,801 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 153 transitions. [2022-03-17 15:54:26,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-17 15:54:26,801 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:54:26,801 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:54:26,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-17 15:54:27,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-17 15:54:27,011 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:54:27,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:54:27,012 INFO L85 PathProgramCache]: Analyzing trace with hash 181119312, now seen corresponding path program 6 times [2022-03-17 15:54:27,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:54:27,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275989400] [2022-03-17 15:54:27,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:54:27,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:54:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:27,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:54:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:27,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:54:27,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:27,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 15:54:27,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:27,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 15:54:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:27,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-17 15:54:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:27,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:54:27,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:27,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 15:54:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:27,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-17 15:54:27,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 14 proven. 83 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-17 15:54:33,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:54:33,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275989400] [2022-03-17 15:54:33,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275989400] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:54:33,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866604088] [2022-03-17 15:54:33,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 15:54:33,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:54:33,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:54:33,198 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:54:33,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-17 15:54:33,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-17 15:54:33,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:54:33,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 101 conjunts are in the unsatisfiable core [2022-03-17 15:54:33,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:54:33,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-03-17 15:54:44,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-03-17 15:55:01,308 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 81 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-17 15:55:01,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:55:01,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866604088] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:55:01,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:55:01,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 38] total 67 [2022-03-17 15:55:01,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061673597] [2022-03-17 15:55:01,742 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 15:55:01,742 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-17 15:55:01,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:55:01,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-17 15:55:01,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=4236, Unknown=14, NotChecked=0, Total=4556 [2022-03-17 15:55:01,743 INFO L87 Difference]: Start difference. First operand 131 states and 153 transitions. Second operand has 67 states, 60 states have (on average 1.5666666666666667) internal successors, (94), 59 states have internal predecessors, (94), 11 states have call successors, (17), 4 states have call predecessors, (17), 7 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2022-03-17 15:57:34,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:57:34,151 INFO L93 Difference]: Finished difference Result 149 states and 172 transitions. [2022-03-17 15:57:34,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-17 15:57:34,152 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 60 states have (on average 1.5666666666666667) internal successors, (94), 59 states have internal predecessors, (94), 11 states have call successors, (17), 4 states have call predecessors, (17), 7 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) Word has length 79 [2022-03-17 15:57:34,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:57:34,153 INFO L225 Difference]: With dead ends: 149 [2022-03-17 15:57:34,153 INFO L226 Difference]: Without dead ends: 133 [2022-03-17 15:57:34,156 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5272 ImplicationChecksByTransitivity, 180.1s TimeCoverageRelationStatistics Valid=1035, Invalid=16443, Unknown=78, NotChecked=0, Total=17556 [2022-03-17 15:57:34,156 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 54 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 2257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 736 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-17 15:57:34,157 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 239 Invalid, 2257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1462 Invalid, 0 Unknown, 736 Unchecked, 1.6s Time] [2022-03-17 15:57:34,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-17 15:57:34,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 128. [2022-03-17 15:57:34,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 97 states have internal predecessors, (107), 21 states have call successors, (21), 11 states have call predecessors, (21), 12 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-03-17 15:57:34,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 149 transitions. [2022-03-17 15:57:34,159 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 149 transitions. Word has length 79 [2022-03-17 15:57:34,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:57:34,160 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 149 transitions. [2022-03-17 15:57:34,160 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 60 states have (on average 1.5666666666666667) internal successors, (94), 59 states have internal predecessors, (94), 11 states have call successors, (17), 4 states have call predecessors, (17), 7 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2022-03-17 15:57:34,160 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 149 transitions. [2022-03-17 15:57:34,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-17 15:57:34,160 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:57:34,160 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:57:34,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-17 15:57:34,361 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:57:34,361 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:57:34,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:57:34,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1729343584, now seen corresponding path program 1 times [2022-03-17 15:57:34,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:57:34,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452984871] [2022-03-17 15:57:34,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:57:34,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:57:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:34,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:57:34,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:34,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:57:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:34,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 15:57:34,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:34,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 15:57:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:34,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-17 15:57:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:34,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:57:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:34,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 15:57:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:34,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-17 15:57:34,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:34,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-17 15:57:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:34,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-17 15:57:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:34,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-03-17 15:57:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:34,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-03-17 15:57:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-17 15:57:34,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:57:34,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452984871] [2022-03-17 15:57:34,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452984871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:57:34,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98299511] [2022-03-17 15:57:34,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:57:34,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:57:34,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:57:34,702 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:57:34,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-17 15:57:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:34,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 86 conjunts are in the unsatisfiable core [2022-03-17 15:57:34,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:57:34,809 INFO L390 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-03-17 15:57:35,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-03-17 15:57:35,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-17 15:57:35,036 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-03-17 15:57:35,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 18 [2022-03-17 15:57:35,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-17 15:57:35,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-17 15:57:35,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 39 [2022-03-17 15:57:35,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-17 15:57:35,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 36 [2022-03-17 15:57:35,458 INFO L390 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-17 15:57:35,462 INFO L390 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-17 15:57:36,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-17 15:57:36,420 INFO L356 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-03-17 15:57:36,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 36 [2022-03-17 15:57:36,465 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-17 15:57:36,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:57:36,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98299511] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:57:36,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:57:36,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2022-03-17 15:57:36,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856701955] [2022-03-17 15:57:36,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 15:57:36,703 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-17 15:57:36,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:57:36,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-17 15:57:36,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2022-03-17 15:57:36,704 INFO L87 Difference]: Start difference. First operand 128 states and 149 transitions. Second operand has 29 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 10 states have call successors, (26), 7 states have call predecessors, (26), 6 states have return successors, (22), 7 states have call predecessors, (22), 9 states have call successors, (22) [2022-03-17 15:57:39,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:57:39,783 INFO L93 Difference]: Finished difference Result 180 states and 205 transitions. [2022-03-17 15:57:39,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-17 15:57:39,783 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 10 states have call successors, (26), 7 states have call predecessors, (26), 6 states have return successors, (22), 7 states have call predecessors, (22), 9 states have call successors, (22) Word has length 85 [2022-03-17 15:57:39,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:57:39,784 INFO L225 Difference]: With dead ends: 180 [2022-03-17 15:57:39,784 INFO L226 Difference]: Without dead ends: 121 [2022-03-17 15:57:39,785 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 115 SyntacticMatches, 12 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=320, Invalid=3101, Unknown=1, NotChecked=0, Total=3422 [2022-03-17 15:57:39,785 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 138 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-17 15:57:39,785 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 196 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 882 Invalid, 0 Unknown, 226 Unchecked, 0.5s Time] [2022-03-17 15:57:39,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-17 15:57:39,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2022-03-17 15:57:39,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 86 states have internal predecessors, (92), 18 states have call successors, (18), 11 states have call predecessors, (18), 11 states have return successors, (16), 16 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-17 15:57:39,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2022-03-17 15:57:39,788 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 85 [2022-03-17 15:57:39,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:57:39,788 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2022-03-17 15:57:39,788 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 10 states have call successors, (26), 7 states have call predecessors, (26), 6 states have return successors, (22), 7 states have call predecessors, (22), 9 states have call successors, (22) [2022-03-17 15:57:39,788 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2022-03-17 15:57:39,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-17 15:57:39,789 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:57:39,789 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:57:39,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-17 15:57:40,005 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:57:40,006 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:57:40,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:57:40,006 INFO L85 PathProgramCache]: Analyzing trace with hash 74091419, now seen corresponding path program 1 times [2022-03-17 15:57:40,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:57:40,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891603995] [2022-03-17 15:57:40,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:57:40,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:57:40,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:40,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:57:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:40,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:57:40,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:40,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 15:57:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:40,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 15:57:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:40,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-17 15:57:40,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:40,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:57:40,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:40,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 15:57:40,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:40,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-17 15:57:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:40,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-17 15:57:40,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:40,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-03-17 15:57:40,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:40,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-17 15:57:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:40,109 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-17 15:57:40,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:57:40,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891603995] [2022-03-17 15:57:40,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891603995] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:57:40,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815317432] [2022-03-17 15:57:40,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:57:40,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:57:40,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:57:40,110 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:57:40,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-17 15:57:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:40,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-17 15:57:40,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:57:40,307 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-17 15:57:40,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:57:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-17 15:57:40,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815317432] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:57:40,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:57:40,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 13 [2022-03-17 15:57:40,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463335608] [2022-03-17 15:57:40,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:57:40,467 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-17 15:57:40,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:57:40,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-17 15:57:40,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-17 15:57:40,468 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 11 states have internal predecessors, (55), 2 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-03-17 15:57:40,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:57:40,817 INFO L93 Difference]: Finished difference Result 143 states and 159 transitions. [2022-03-17 15:57:40,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-17 15:57:40,817 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 11 states have internal predecessors, (55), 2 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 88 [2022-03-17 15:57:40,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:57:40,818 INFO L225 Difference]: With dead ends: 143 [2022-03-17 15:57:40,818 INFO L226 Difference]: Without dead ends: 134 [2022-03-17 15:57:40,818 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2022-03-17 15:57:40,819 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 119 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 15:57:40,819 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 56 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 15:57:40,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-17 15:57:40,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 126. [2022-03-17 15:57:40,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 96 states have (on average 1.1041666666666667) internal successors, (106), 98 states have internal predecessors, (106), 18 states have call successors, (18), 11 states have call predecessors, (18), 11 states have return successors, (16), 16 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-17 15:57:40,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 140 transitions. [2022-03-17 15:57:40,821 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 140 transitions. Word has length 88 [2022-03-17 15:57:40,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:57:40,821 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 140 transitions. [2022-03-17 15:57:40,822 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 11 states have internal predecessors, (55), 2 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-03-17 15:57:40,822 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 140 transitions. [2022-03-17 15:57:40,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-17 15:57:40,822 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:57:40,822 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:57:40,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-17 15:57:41,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:57:41,031 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:57:41,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:57:41,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1973629885, now seen corresponding path program 2 times [2022-03-17 15:57:41,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:57:41,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511369790] [2022-03-17 15:57:41,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:57:41,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:57:41,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:41,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:57:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:41,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:57:41,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:41,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 15:57:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:41,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 15:57:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:41,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-17 15:57:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:41,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:57:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:41,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 15:57:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:41,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-17 15:57:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:49,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-17 15:57:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:49,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-17 15:57:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:49,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-03-17 15:57:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:57:49,347 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 19 proven. 60 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-17 15:57:49,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:57:49,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511369790] [2022-03-17 15:57:49,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511369790] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:57:49,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609058873] [2022-03-17 15:57:49,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 15:57:49,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:57:49,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:57:49,349 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:57:49,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-17 15:57:49,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 15:57:49,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:57:49,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 101 conjunts are in the unsatisfiable core [2022-03-17 15:57:49,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:57:49,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-03-17 15:58:02,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-03-17 15:58:04,341 WARN L855 $PredicateComparison]: unable to prove that (exists ((mkdup_~j~0 Int) (mkdup_~x~0 Int) (mkdup_~i~0 Int)) (and (< mkdup_~i~0 c_main_~n~0) (not (= mkdup_~j~0 mkdup_~i~0)) (<= 0 mkdup_~i~0) (= (store (store ((as const (Array Int Int)) 0) (+ c_main_~a~0.offset (* mkdup_~i~0 4)) mkdup_~x~0) (+ (* mkdup_~j~0 4) c_main_~a~0.offset) mkdup_~x~0) (select |c_#memory_int| c_main_~a~0.base)))) is different from true [2022-03-17 15:58:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 9 proven. 68 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-17 15:58:10,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:58:11,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609058873] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:58:11,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:58:11,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 38] total 64 [2022-03-17 15:58:11,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269416905] [2022-03-17 15:58:11,210 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 15:58:11,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-17 15:58:11,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:58:11,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-17 15:58:11,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=3635, Unknown=7, NotChecked=124, Total=4160 [2022-03-17 15:58:11,212 INFO L87 Difference]: Start difference. First operand 126 states and 140 transitions. Second operand has 64 states, 60 states have (on average 1.4833333333333334) internal successors, (89), 58 states have internal predecessors, (89), 8 states have call successors, (22), 4 states have call predecessors, (22), 8 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-17 15:58:44,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:58:44,480 INFO L93 Difference]: Finished difference Result 122 states and 137 transitions. [2022-03-17 15:58:44,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-17 15:58:44,481 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 60 states have (on average 1.4833333333333334) internal successors, (89), 58 states have internal predecessors, (89), 8 states have call successors, (22), 4 states have call predecessors, (22), 8 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) Word has length 91 [2022-03-17 15:58:44,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:58:44,482 INFO L225 Difference]: With dead ends: 122 [2022-03-17 15:58:44,482 INFO L226 Difference]: Without dead ends: 118 [2022-03-17 15:58:44,483 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 54.5s TimeCoverageRelationStatistics Valid=1170, Invalid=12388, Unknown=18, NotChecked=230, Total=13806 [2022-03-17 15:58:44,484 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 184 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1847 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 2334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 296 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-17 15:58:44,484 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 103 Invalid, 2334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1847 Invalid, 0 Unknown, 296 Unchecked, 2.3s Time] [2022-03-17 15:58:44,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-17 15:58:44,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 102. [2022-03-17 15:58:44,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 80 states have (on average 1.1) internal successors, (88), 81 states have internal predecessors, (88), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 15:58:44,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2022-03-17 15:58:44,486 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 91 [2022-03-17 15:58:44,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:58:44,486 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2022-03-17 15:58:44,486 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 60 states have (on average 1.4833333333333334) internal successors, (89), 58 states have internal predecessors, (89), 8 states have call successors, (22), 4 states have call predecessors, (22), 8 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-17 15:58:44,486 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2022-03-17 15:58:44,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-17 15:58:44,487 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:58:44,487 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:58:44,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-17 15:58:44,694 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-17 15:58:44,695 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:58:44,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:58:44,695 INFO L85 PathProgramCache]: Analyzing trace with hash -507134286, now seen corresponding path program 7 times [2022-03-17 15:58:44,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:58:44,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90814938] [2022-03-17 15:58:44,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:58:44,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:58:44,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:58:44,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:58:44,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:58:44,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:58:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:58:44,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 15:58:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:58:44,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 15:58:44,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:58:44,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-17 15:58:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:58:44,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:58:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:58:44,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 15:58:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:58:44,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-17 15:58:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:58:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 107 proven. 22 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-03-17 15:58:44,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:58:44,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90814938] [2022-03-17 15:58:44,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90814938] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:58:44,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55549663] [2022-03-17 15:58:44,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-17 15:58:44,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:58:44,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:58:44,788 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:58:44,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-17 15:58:44,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:58:44,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-17 15:58:44,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:58:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 51 proven. 89 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-17 15:58:45,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:58:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 51 proven. 89 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-17 15:58:45,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55549663] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:58:45,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:58:45,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2022-03-17 15:58:45,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769710919] [2022-03-17 15:58:45,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:58:45,178 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-17 15:58:45,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:58:45,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-17 15:58:45,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-17 15:58:45,179 INFO L87 Difference]: Start difference. First operand 102 states and 114 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 11 states have internal predecessors, (62), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-17 15:58:45,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:58:45,457 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2022-03-17 15:58:45,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-17 15:58:45,458 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 11 states have internal predecessors, (62), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 88 [2022-03-17 15:58:45,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:58:45,458 INFO L225 Difference]: With dead ends: 73 [2022-03-17 15:58:45,458 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 15:58:45,458 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 187 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2022-03-17 15:58:45,458 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 43 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:58:45,462 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 36 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:58:45,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 15:58:45,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 15:58:45,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-17 15:58:45,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 15:58:45,463 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 88 [2022-03-17 15:58:45,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:58:45,463 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 15:58:45,463 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 11 states have internal predecessors, (62), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-17 15:58:45,463 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 15:58:45,463 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 15:58:45,465 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 15:58:45,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-17 15:58:45,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:58:45,686 INFO L718 BasicCegarLoop]: Path program histogram: [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:58:45,687 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 15:58:45,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 03:58:45 BasicIcfg [2022-03-17 15:58:45,698 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 15:58:45,699 INFO L158 Benchmark]: Toolchain (without parser) took 476995.48ms. Allocated memory was 206.6MB in the beginning and 358.6MB in the end (delta: 152.0MB). Free memory was 150.3MB in the beginning and 278.2MB in the end (delta: -128.0MB). Peak memory consumption was 24.9MB. Max. memory is 8.0GB. [2022-03-17 15:58:45,699 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 206.6MB. Free memory is still 166.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 15:58:45,700 INFO L158 Benchmark]: CACSL2BoogieTranslator took 188.25ms. Allocated memory is still 206.6MB. Free memory was 150.1MB in the beginning and 177.6MB in the end (delta: -27.5MB). Peak memory consumption was 9.5MB. Max. memory is 8.0GB. [2022-03-17 15:58:45,700 INFO L158 Benchmark]: Boogie Preprocessor took 23.40ms. Allocated memory is still 206.6MB. Free memory was 177.6MB in the beginning and 175.8MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 15:58:45,700 INFO L158 Benchmark]: RCFGBuilder took 435.57ms. Allocated memory is still 206.6MB. Free memory was 175.7MB in the beginning and 161.6MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2022-03-17 15:58:45,700 INFO L158 Benchmark]: IcfgTransformer took 35.37ms. Allocated memory is still 206.6MB. Free memory was 161.6MB in the beginning and 160.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 15:58:45,700 INFO L158 Benchmark]: TraceAbstraction took 476306.34ms. Allocated memory was 206.6MB in the beginning and 358.6MB in the end (delta: 152.0MB). Free memory was 159.5MB in the beginning and 278.2MB in the end (delta: -118.7MB). Peak memory consumption was 34.3MB. Max. memory is 8.0GB. [2022-03-17 15:58:45,701 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 206.6MB. Free memory is still 166.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 188.25ms. Allocated memory is still 206.6MB. Free memory was 150.1MB in the beginning and 177.6MB in the end (delta: -27.5MB). Peak memory consumption was 9.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.40ms. Allocated memory is still 206.6MB. Free memory was 177.6MB in the beginning and 175.8MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 435.57ms. Allocated memory is still 206.6MB. Free memory was 175.7MB in the beginning and 161.6MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * IcfgTransformer took 35.37ms. Allocated memory is still 206.6MB. Free memory was 161.6MB in the beginning and 160.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 476306.34ms. Allocated memory was 206.6MB in the beginning and 358.6MB in the end (delta: 152.0MB). Free memory was 159.5MB in the beginning and 278.2MB in the end (delta: -118.7MB). Peak memory consumption was 34.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 10]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 476.2s, OverallIterations: 23, TraceHistogramMax: 8, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 280.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2216 SdHoareTripleChecker+Valid, 10.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2101 mSDsluCounter, 3326 SdHoareTripleChecker+Invalid, 8.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2187 IncrementalHoareTripleChecker+Unchecked, 2256 mSDsCounter, 1603 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15093 IncrementalHoareTripleChecker+Invalid, 18883 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1603 mSolverCounterUnsat, 1070 mSDtfsCounter, 15093 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3108 GetRequests, 2178 SyntacticMatches, 50 SemanticMatches, 880 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 15825 ImplicationChecksByTransitivity, 431.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=139occurred in iteration=16, InterpolantAutomatonStates: 511, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 23 MinimizatonAttempts, 206 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 189.6s InterpolantComputationTime, 2726 NumberOfCodeBlocks, 2694 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 3351 ConstructedInterpolants, 160 QuantifiedInterpolants, 37768 SizeOfPredicates, 212 NumberOfNonLiveVariables, 4622 ConjunctsInSsa, 737 ConjunctsInUnsatCore, 50 InterpolantComputations, 9 PerfectInterpolantSequences, 2040/2875 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-17 15:58:45,907 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-03-17 15:58:45,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...