/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 22:28:57,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 22:28:57,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 22:28:57,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 22:28:57,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 22:28:57,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 22:28:57,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 22:28:57,644 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 22:28:57,646 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 22:28:57,650 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 22:28:57,651 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 22:28:57,651 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 22:28:57,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 22:28:57,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 22:28:57,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 22:28:57,653 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 22:28:57,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 22:28:57,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 22:28:57,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 22:28:57,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 22:28:57,656 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 22:28:57,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 22:28:57,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 22:28:57,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 22:28:57,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 22:28:57,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-18 22:28:57,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-18 22:28:57,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-18 22:28:57,670 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-18 22:28:57,670 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-18 22:28:57,671 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-18 22:28:57,671 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-18 22:28:57,672 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-18 22:28:57,672 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-18 22:28:57,673 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-18 22:28:57,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-18 22:28:57,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-18 22:28:57,674 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-18 22:28:57,674 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-18 22:28:57,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 22:28:57,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 22:28:57,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 22:28:57,677 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-18 22:28:57,701 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 22:28:57,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 22:28:57,702 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 22:28:57,702 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 22:28:57,703 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 22:28:57,703 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 22:28:57,703 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 22:28:57,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 22:28:57,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 22:28:57,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 22:28:57,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 22:28:57,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 22:28:57,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 22:28:57,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 22:28:57,705 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 22:28:57,705 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 22:28:57,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 22:28:57,705 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 22:28:57,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 22:28:57,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 22:28:57,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 22:28:57,705 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 22:28:57,706 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 22:28:57,706 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 22:28:57,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 22:28:57,706 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 22:28:57,706 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-18 22:28:57,706 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-18 22:28:57,707 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 22:28:57,707 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 22:28:57,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 22:28:57,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 22:28:57,883 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 22:28:57,884 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 22:28:57,886 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 22:28:57,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c [2022-03-18 22:28:57,948 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd3753207/4530404ebf5e4167bdd6cfbe950626cb/FLAGbe8632784 [2022-03-18 22:28:58,285 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 22:28:58,286 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c [2022-03-18 22:28:58,289 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd3753207/4530404ebf5e4167bdd6cfbe950626cb/FLAGbe8632784 [2022-03-18 22:28:58,297 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd3753207/4530404ebf5e4167bdd6cfbe950626cb [2022-03-18 22:28:58,299 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 22:28:58,300 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 22:28:58,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 22:28:58,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 22:28:58,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 22:28:58,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 10:28:58" (1/1) ... [2022-03-18 22:28:58,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dfd638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:28:58, skipping insertion in model container [2022-03-18 22:28:58,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 10:28:58" (1/1) ... [2022-03-18 22:28:58,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 22:28:58,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 22:28:58,427 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c[318,331] [2022-03-18 22:28:58,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 22:28:58,438 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 22:28:58,445 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c[318,331] [2022-03-18 22:28:58,447 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 22:28:58,463 INFO L208 MainTranslator]: Completed translation [2022-03-18 22:28:58,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:28:58 WrapperNode [2022-03-18 22:28:58,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 22:28:58,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 22:28:58,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 22:28:58,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 22:28:58,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:28:58" (1/1) ... [2022-03-18 22:28:58,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:28:58" (1/1) ... [2022-03-18 22:28:58,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:28:58" (1/1) ... [2022-03-18 22:28:58,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:28:58" (1/1) ... [2022-03-18 22:28:58,478 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:28:58" (1/1) ... [2022-03-18 22:28:58,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:28:58" (1/1) ... [2022-03-18 22:28:58,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:28:58" (1/1) ... [2022-03-18 22:28:58,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 22:28:58,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 22:28:58,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 22:28:58,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 22:28:58,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:28:58" (1/1) ... [2022-03-18 22:28:58,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 22:28:58,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:28:58,503 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) [2022-03-18 22:28:58,512 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 [2022-03-18 22:28:58,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 22:28:58,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 22:28:58,534 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 22:28:58,534 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 22:28:58,535 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 22:28:58,535 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 22:28:58,535 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 22:28:58,536 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 22:28:58,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 22:28:58,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 22:28:58,536 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 22:28:58,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 22:28:58,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 22:28:58,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 22:28:58,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 22:28:58,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 22:28:58,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 22:28:58,583 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 22:28:58,584 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 22:28:58,635 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 22:28:58,639 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 22:28:58,639 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 22:28:58,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:28:58 BoogieIcfgContainer [2022-03-18 22:28:58,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 22:28:58,641 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 22:28:58,641 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 22:28:58,643 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 22:28:58,645 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:28:58" (1/1) ... [2022-03-18 22:28:58,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 10:28:58 BasicIcfg [2022-03-18 22:28:58,655 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 22:28:58,657 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 22:28:58,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 22:28:58,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 22:28:58,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 10:28:58" (1/4) ... [2022-03-18 22:28:58,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a7edad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 10:28:58, skipping insertion in model container [2022-03-18 22:28:58,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:28:58" (2/4) ... [2022-03-18 22:28:58,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a7edad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 10:28:58, skipping insertion in model container [2022-03-18 22:28:58,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:28:58" (3/4) ... [2022-03-18 22:28:58,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a7edad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 10:28:58, skipping insertion in model container [2022-03-18 22:28:58,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 10:28:58" (4/4) ... [2022-03-18 22:28:58,673 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_9.cqvasr [2022-03-18 22:28:58,677 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 22:28:58,677 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 22:28:58,704 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 22:28:58,708 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 22:28:58,708 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 22:28:58,718 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 22:28:58,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 22:28:58,721 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:28:58,721 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:28:58,721 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:28:58,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:28:58,724 INFO L85 PathProgramCache]: Analyzing trace with hash -154368955, now seen corresponding path program 1 times [2022-03-18 22:28:58,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:28:58,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056319803] [2022-03-18 22:28:58,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:28:58,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:28:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:28:58,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:28:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:28:58,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:28:58,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:28:58,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056319803] [2022-03-18 22:28:58,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056319803] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:28:58,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:28:58,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 22:28:58,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042051672] [2022-03-18 22:28:58,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:28:58,836 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 22:28:58,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:28:58,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 22:28:58,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 22:28:58,856 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:28:58,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:28:58,893 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-03-18 22:28:58,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 22:28:58,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-18 22:28:58,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:28:58,900 INFO L225 Difference]: With dead ends: 32 [2022-03-18 22:28:58,901 INFO L226 Difference]: Without dead ends: 13 [2022-03-18 22:28:58,902 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 22:28:58,908 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:28:58,909 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:28:58,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-18 22:28:58,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-03-18 22:28:58,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:28:58,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-03-18 22:28:58,929 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-03-18 22:28:58,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:28:58,930 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-03-18 22:28:58,930 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:28:58,930 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-03-18 22:28:58,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 22:28:58,930 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:28:58,930 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:28:58,931 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 22:28:58,931 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:28:58,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:28:58,931 INFO L85 PathProgramCache]: Analyzing trace with hash -153445434, now seen corresponding path program 1 times [2022-03-18 22:28:58,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:28:58,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23166653] [2022-03-18 22:28:58,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:28:58,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:28:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:28:58,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:28:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:28:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:28:58,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:28:58,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23166653] [2022-03-18 22:28:58,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23166653] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:28:58,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:28:58,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 22:28:58,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906986180] [2022-03-18 22:28:58,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:28:58,981 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 22:28:58,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:28:58,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 22:28:58,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 22:28:58,982 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:28:59,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:28:59,011 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-03-18 22:28:59,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 22:28:59,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-18 22:28:59,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:28:59,015 INFO L225 Difference]: With dead ends: 22 [2022-03-18 22:28:59,016 INFO L226 Difference]: Without dead ends: 15 [2022-03-18 22:28:59,016 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 22:28:59,017 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:28:59,018 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:28:59,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-18 22:28:59,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-18 22:28:59,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:28:59,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-03-18 22:28:59,023 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-03-18 22:28:59,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:28:59,023 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-03-18 22:28:59,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:28:59,024 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-03-18 22:28:59,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-18 22:28:59,024 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:28:59,024 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:28:59,024 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 22:28:59,024 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:28:59,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:28:59,025 INFO L85 PathProgramCache]: Analyzing trace with hash -521762940, now seen corresponding path program 1 times [2022-03-18 22:28:59,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:28:59,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771728283] [2022-03-18 22:28:59,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:28:59,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:28:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:28:59,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:28:59,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:28:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:28:59,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:28:59,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771728283] [2022-03-18 22:28:59,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771728283] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:28:59,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199907736] [2022-03-18 22:28:59,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:28:59,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:28:59,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:28:59,111 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) [2022-03-18 22:28:59,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 22:28:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:28:59,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-18 22:28:59,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:28:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:28:59,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:28:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:28:59,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199907736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:28:59,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:28:59,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-18 22:28:59,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966738631] [2022-03-18 22:28:59,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:28:59,261 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 22:28:59,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:28:59,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 22:28:59,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-18 22:28:59,262 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:28:59,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:28:59,332 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2022-03-18 22:28:59,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 22:28:59,332 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-18 22:28:59,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:28:59,333 INFO L225 Difference]: With dead ends: 27 [2022-03-18 22:28:59,333 INFO L226 Difference]: Without dead ends: 20 [2022-03-18 22:28:59,336 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-18 22:28:59,339 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:28:59,341 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 23 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:28:59,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-18 22:28:59,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-18 22:28:59,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:28:59,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-03-18 22:28:59,350 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2022-03-18 22:28:59,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:28:59,350 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-03-18 22:28:59,350 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:28:59,350 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-03-18 22:28:59,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 22:28:59,351 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:28:59,351 INFO L500 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:28:59,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 22:28:59,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:28:59,567 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:28:59,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:28:59,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1491075900, now seen corresponding path program 1 times [2022-03-18 22:28:59,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:28:59,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624379814] [2022-03-18 22:28:59,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:28:59,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:28:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:28:59,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:28:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:28:59,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 22:28:59,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:28:59,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624379814] [2022-03-18 22:28:59,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624379814] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:28:59,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504241862] [2022-03-18 22:28:59,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:28:59,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:28:59,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:28:59,630 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) [2022-03-18 22:28:59,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 22:28:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:28:59,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 22:28:59,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:28:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 22:28:59,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:28:59,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 22:28:59,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504241862] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:28:59,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:28:59,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-18 22:28:59,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369672619] [2022-03-18 22:28:59,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:28:59,787 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 22:28:59,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:28:59,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 22:28:59,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-18 22:28:59,789 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:28:59,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:28:59,870 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-03-18 22:28:59,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 22:28:59,871 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-18 22:28:59,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:28:59,873 INFO L225 Difference]: With dead ends: 38 [2022-03-18 22:28:59,873 INFO L226 Difference]: Without dead ends: 28 [2022-03-18 22:28:59,874 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-18 22:28:59,876 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:28:59,877 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 39 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:28:59,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-18 22:28:59,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-03-18 22:28:59,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:28:59,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-03-18 22:28:59,885 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 19 [2022-03-18 22:28:59,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:28:59,885 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-03-18 22:28:59,885 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:28:59,885 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-03-18 22:28:59,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 22:28:59,886 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:28:59,886 INFO L500 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:28:59,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 22:29:00,087 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 [2022-03-18 22:29:00,090 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:29:00,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:29:00,090 INFO L85 PathProgramCache]: Analyzing trace with hash 44690740, now seen corresponding path program 2 times [2022-03-18 22:29:00,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:29:00,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644486741] [2022-03-18 22:29:00,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:29:00,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:29:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:29:00,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:29:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:29:00,158 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 22:29:00,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:29:00,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644486741] [2022-03-18 22:29:00,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644486741] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:29:00,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492254828] [2022-03-18 22:29:00,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:29:00,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:29:00,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:29:00,160 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) [2022-03-18 22:29:00,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 22:29:00,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:29:00,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:29:00,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 22:29:00,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:29:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 22:29:00,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:29:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 22:29:00,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492254828] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:29:00,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:29:00,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-18 22:29:00,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707537596] [2022-03-18 22:29:00,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:29:00,349 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 22:29:00,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:29:00,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 22:29:00,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-18 22:29:00,350 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:29:00,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:29:00,541 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2022-03-18 22:29:00,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 22:29:00,542 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-18 22:29:00,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:29:00,542 INFO L225 Difference]: With dead ends: 54 [2022-03-18 22:29:00,542 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 22:29:00,543 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2022-03-18 22:29:00,543 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:29:00,544 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 39 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 22:29:00,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 22:29:00,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-18 22:29:00,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:29:00,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-03-18 22:29:00,548 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 27 [2022-03-18 22:29:00,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:29:00,548 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-03-18 22:29:00,548 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:29:00,548 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-03-18 22:29:00,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 22:29:00,549 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:29:00,549 INFO L500 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:29:00,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 22:29:00,753 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 [2022-03-18 22:29:00,753 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:29:00,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:29:00,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1982683428, now seen corresponding path program 3 times [2022-03-18 22:29:00,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:29:00,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107192674] [2022-03-18 22:29:00,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:29:00,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:29:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:29:00,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:29:00,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:29:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 22:29:00,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:29:00,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107192674] [2022-03-18 22:29:00,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107192674] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:29:00,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229032489] [2022-03-18 22:29:00,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:29:00,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:29:00,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:29:00,919 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) [2022-03-18 22:29:00,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 22:29:00,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-18 22:29:00,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:29:00,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 22:29:00,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:29:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-03-18 22:29:01,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:29:01,117 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-03-18 22:29:01,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229032489] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:29:01,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:29:01,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 24 [2022-03-18 22:29:01,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107509385] [2022-03-18 22:29:01,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:29:01,119 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 22:29:01,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:29:01,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 22:29:01,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-03-18 22:29:01,121 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:29:01,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:29:01,439 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2022-03-18 22:29:01,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 22:29:01,439 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-03-18 22:29:01,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:29:01,441 INFO L225 Difference]: With dead ends: 64 [2022-03-18 22:29:01,441 INFO L226 Difference]: Without dead ends: 54 [2022-03-18 22:29:01,442 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 22:29:01,442 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:29:01,442 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 23 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 22:29:01,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-18 22:29:01,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-18 22:29:01,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:29:01,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-03-18 22:29:01,447 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 43 [2022-03-18 22:29:01,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:29:01,447 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-03-18 22:29:01,448 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:29:01,448 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-03-18 22:29:01,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 22:29:01,448 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:29:01,448 INFO L500 BasicCegarLoop]: trace histogram [21, 15, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:29:01,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-18 22:29:01,649 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 [2022-03-18 22:29:01,649 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:29:01,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:29:01,649 INFO L85 PathProgramCache]: Analyzing trace with hash -2103021866, now seen corresponding path program 4 times [2022-03-18 22:29:01,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:29:01,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409550651] [2022-03-18 22:29:01,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:29:01,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:29:01,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:29:01,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:29:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:29:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 22:29:01,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:29:01,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409550651] [2022-03-18 22:29:01,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409550651] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:29:01,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091909941] [2022-03-18 22:29:01,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:29:01,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:29:01,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:29:01,790 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) [2022-03-18 22:29:01,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 22:29:01,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:29:01,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:29:01,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 22:29:01,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:29:01,902 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 22:29:01,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:29:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 22:29:02,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091909941] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:29:02,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:29:02,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-18 22:29:02,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659975137] [2022-03-18 22:29:02,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:29:02,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-18 22:29:02,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:29:02,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-18 22:29:02,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 22:29:02,213 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:29:02,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:29:02,681 INFO L93 Difference]: Finished difference Result 106 states and 135 transitions. [2022-03-18 22:29:02,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 22:29:02,681 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-03-18 22:29:02,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:29:02,682 INFO L225 Difference]: With dead ends: 106 [2022-03-18 22:29:02,682 INFO L226 Difference]: Without dead ends: 88 [2022-03-18 22:29:02,683 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 22:29:02,684 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:29:02,684 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 29 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 22:29:02,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-18 22:29:02,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-18 22:29:02,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 83 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:29:02,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2022-03-18 22:29:02,690 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 53 [2022-03-18 22:29:02,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:29:02,691 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2022-03-18 22:29:02,691 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:29:02,691 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2022-03-18 22:29:02,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-18 22:29:02,692 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:29:02,692 INFO L500 BasicCegarLoop]: trace histogram [38, 32, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:29:02,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 22:29:02,906 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:29:02,906 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:29:02,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:29:02,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1986185996, now seen corresponding path program 5 times [2022-03-18 22:29:02,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:29:02,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593992170] [2022-03-18 22:29:02,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:29:02,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:29:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:29:03,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:29:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:29:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 22:29:03,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:29:03,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593992170] [2022-03-18 22:29:03,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593992170] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:29:03,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813002454] [2022-03-18 22:29:03,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:29:03,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:29:03,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:29:03,320 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) [2022-03-18 22:29:03,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 22:29:03,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2022-03-18 22:29:03,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:29:03,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-18 22:29:03,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:29:03,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 22:29:03,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:29:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 22:29:04,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813002454] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:29:04,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:29:04,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-18 22:29:04,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560366302] [2022-03-18 22:29:04,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:29:04,591 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-18 22:29:04,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:29:04,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-18 22:29:04,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-03-18 22:29:04,593 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:29:06,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:29:06,219 INFO L93 Difference]: Finished difference Result 174 states and 220 transitions. [2022-03-18 22:29:06,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-18 22:29:06,219 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-03-18 22:29:06,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:29:06,220 INFO L225 Difference]: With dead ends: 174 [2022-03-18 22:29:06,220 INFO L226 Difference]: Without dead ends: 156 [2022-03-18 22:29:06,224 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2022-03-18 22:29:06,224 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:29:06,224 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 34 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:29:06,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-18 22:29:06,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-03-18 22:29:06,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0463576158940397) internal successors, (158), 151 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:29:06,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 162 transitions. [2022-03-18 22:29:06,233 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 162 transitions. Word has length 87 [2022-03-18 22:29:06,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:29:06,233 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 162 transitions. [2022-03-18 22:29:06,233 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:29:06,233 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 162 transitions. [2022-03-18 22:29:06,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-18 22:29:06,234 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:29:06,234 INFO L500 BasicCegarLoop]: trace histogram [72, 66, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:29:06,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 22:29:06,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:29:06,439 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:29:06,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:29:06,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1296796336, now seen corresponding path program 6 times [2022-03-18 22:29:06,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:29:06,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475894673] [2022-03-18 22:29:06,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:29:06,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:29:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:29:07,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:29:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:29:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 737 proven. 4422 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 22:29:07,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:29:07,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475894673] [2022-03-18 22:29:07,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475894673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:29:07,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368751162] [2022-03-18 22:29:07,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 22:29:07,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:29:07,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:29:07,818 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) [2022-03-18 22:29:07,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 22:29:07,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-03-18 22:29:07,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:29:07,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 22:29:07,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:29:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2022-03-18 22:29:08,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:29:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2022-03-18 22:29:08,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368751162] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:29:08,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:29:08,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 9, 9] total 84 [2022-03-18 22:29:08,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930982365] [2022-03-18 22:29:08,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:29:08,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-18 22:29:08,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:29:08,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-18 22:29:08,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 22:29:08,766 INFO L87 Difference]: Start difference. First operand 156 states and 162 transitions. Second operand has 84 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 83 states have internal predecessors, (175), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:29:11,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:29:11,217 INFO L93 Difference]: Finished difference Result 192 states and 221 transitions. [2022-03-18 22:29:11,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-18 22:29:11,217 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 83 states have internal predecessors, (175), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-03-18 22:29:11,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:29:11,218 INFO L225 Difference]: With dead ends: 192 [2022-03-18 22:29:11,218 INFO L226 Difference]: Without dead ends: 174 [2022-03-18 22:29:11,223 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-03-18 22:29:11,224 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 168 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:29:11,224 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 33 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:29:11,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-03-18 22:29:11,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-03-18 22:29:11,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.0887573964497042) internal successors, (184), 169 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:29:11,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 188 transitions. [2022-03-18 22:29:11,239 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 188 transitions. Word has length 155 [2022-03-18 22:29:11,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:29:11,239 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 188 transitions. [2022-03-18 22:29:11,239 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 83 states have internal predecessors, (175), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:29:11,239 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 188 transitions. [2022-03-18 22:29:11,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-18 22:29:11,241 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:29:11,241 INFO L500 BasicCegarLoop]: trace histogram [81, 67, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:29:11,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 22:29:11,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:29:11,444 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:29:11,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:29:11,444 INFO L85 PathProgramCache]: Analyzing trace with hash -140127658, now seen corresponding path program 7 times [2022-03-18 22:29:11,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:29:11,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065766245] [2022-03-18 22:29:11,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:29:11,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:29:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:29:12,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:29:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:29:12,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-18 22:29:12,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:29:12,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065766245] [2022-03-18 22:29:12,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065766245] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:29:12,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30537454] [2022-03-18 22:29:12,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 22:29:12,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:29:12,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:29:12,804 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) [2022-03-18 22:29:12,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 22:29:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:29:12,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-18 22:29:12,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:29:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-18 22:29:13,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:29:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-18 22:29:17,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30537454] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:29:17,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:29:17,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-03-18 22:29:17,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559827657] [2022-03-18 22:29:17,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:29:17,071 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-03-18 22:29:17,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:29:17,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-03-18 22:29:17,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-03-18 22:29:17,074 INFO L87 Difference]: Start difference. First operand 174 states and 188 transitions. Second operand has 140 states, 140 states have (on average 2.0428571428571427) internal successors, (286), 139 states have internal predecessors, (286), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:29:22,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:29:22,627 INFO L93 Difference]: Finished difference Result 346 states and 443 transitions. [2022-03-18 22:29:22,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-03-18 22:29:22,628 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0428571428571427) internal successors, (286), 139 states have internal predecessors, (286), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-03-18 22:29:22,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:29:22,629 INFO L225 Difference]: With dead ends: 346 [2022-03-18 22:29:22,629 INFO L226 Difference]: Without dead ends: 312 [2022-03-18 22:29:22,634 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11860 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=28498, Invalid=47402, Unknown=0, NotChecked=0, Total=75900 [2022-03-18 22:29:22,634 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 144 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:29:22,635 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 44 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:29:22,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-03-18 22:29:22,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2022-03-18 22:29:22,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 307 states have (on average 1.0488599348534202) internal successors, (322), 307 states have internal predecessors, (322), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:29:22,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 326 transitions. [2022-03-18 22:29:22,661 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 326 transitions. Word has length 173 [2022-03-18 22:29:22,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:29:22,661 INFO L478 AbstractCegarLoop]: Abstraction has 312 states and 326 transitions. [2022-03-18 22:29:22,661 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.0428571428571427) internal successors, (286), 139 states have internal predecessors, (286), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:29:22,661 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 326 transitions. [2022-03-18 22:29:22,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-03-18 22:29:22,664 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:29:22,664 INFO L500 BasicCegarLoop]: trace histogram [150, 136, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:29:22,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 22:29:22,877 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,SelfDestructingSolverStorable9 [2022-03-18 22:29:22,877 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:29:22,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:29:22,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1017097204, now seen corresponding path program 8 times [2022-03-18 22:29:22,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:29:22,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668150345] [2022-03-18 22:29:22,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:29:22,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:29:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:29:28,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:29:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:29:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-18 22:29:28,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:29:28,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668150345] [2022-03-18 22:29:28,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668150345] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:29:28,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260109757] [2022-03-18 22:29:28,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:29:28,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:29:28,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:29:28,098 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) [2022-03-18 22:29:28,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 22:29:28,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:29:28,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:29:28,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 138 conjunts are in the unsatisfiable core [2022-03-18 22:29:28,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:29:28,688 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-18 22:29:28,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:29:43,863 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-18 22:29:43,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260109757] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:29:43,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:29:43,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 139, 139] total 278 [2022-03-18 22:29:43,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361590948] [2022-03-18 22:29:43,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:29:43,865 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 278 states [2022-03-18 22:29:43,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:29:43,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 278 interpolants. [2022-03-18 22:29:43,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38228, Invalid=38778, Unknown=0, NotChecked=0, Total=77006 [2022-03-18 22:29:43,873 INFO L87 Difference]: Start difference. First operand 312 states and 326 transitions. Second operand has 278 states, 278 states have (on average 2.0215827338129495) internal successors, (562), 277 states have internal predecessors, (562), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:30:05,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:30:05,310 INFO L93 Difference]: Finished difference Result 622 states and 788 transitions. [2022-03-18 22:30:05,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-03-18 22:30:05,310 INFO L78 Accepts]: Start accepts. Automaton has has 278 states, 278 states have (on average 2.0215827338129495) internal successors, (562), 277 states have internal predecessors, (562), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 311 [2022-03-18 22:30:05,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:30:05,312 INFO L225 Difference]: With dead ends: 622 [2022-03-18 22:30:05,312 INFO L226 Difference]: Without dead ends: 588 [2022-03-18 22:30:05,325 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1036 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47533 ImplicationChecksByTransitivity, 39.7s TimeCoverageRelationStatistics Valid=114127, Invalid=190025, Unknown=0, NotChecked=0, Total=304152 [2022-03-18 22:30:05,325 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 282 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:30:05,325 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 44 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:30:05,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-03-18 22:30:05,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 588. [2022-03-18 22:30:05,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 583 states have (on average 1.0257289879931388) internal successors, (598), 583 states have internal predecessors, (598), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:30:05,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 602 transitions. [2022-03-18 22:30:05,340 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 602 transitions. Word has length 311 [2022-03-18 22:30:05,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:30:05,341 INFO L478 AbstractCegarLoop]: Abstraction has 588 states and 602 transitions. [2022-03-18 22:30:05,341 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 278 states, 278 states have (on average 2.0215827338129495) internal successors, (562), 277 states have internal predecessors, (562), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:30:05,341 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 602 transitions. [2022-03-18 22:30:05,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2022-03-18 22:30:05,347 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:30:05,347 INFO L500 BasicCegarLoop]: trace histogram [288, 274, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:30:05,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 22:30:05,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:30:05,564 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:30:05,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:30:05,564 INFO L85 PathProgramCache]: Analyzing trace with hash -845736712, now seen corresponding path program 9 times [2022-03-18 22:30:05,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:30:05,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42776278] [2022-03-18 22:30:05,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:30:05,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:30:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:30:25,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:30:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:30:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 7425 proven. 75350 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-18 22:30:25,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:30:25,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42776278] [2022-03-18 22:30:25,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42776278] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:30:25,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35726936] [2022-03-18 22:30:25,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:30:25,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:30:25,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:30:25,853 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) [2022-03-18 22:30:25,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 22:30:25,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2022-03-18 22:30:25,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:30:25,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 22:30:25,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:30:28,711 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74802 trivial. 0 not checked. [2022-03-18 22:30:28,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:30:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74802 trivial. 0 not checked. [2022-03-18 22:30:31,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35726936] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:30:31,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:30:31,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 17, 17] total 308 [2022-03-18 22:30:31,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332501640] [2022-03-18 22:30:31,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:30:31,593 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 308 states [2022-03-18 22:30:31,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:30:31,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 308 interpolants. [2022-03-18 22:30:31,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46973, Invalid=47583, Unknown=0, NotChecked=0, Total=94556 [2022-03-18 22:30:31,602 INFO L87 Difference]: Start difference. First operand 588 states and 602 transitions. Second operand has 308 states, 308 states have (on average 2.022727272727273) internal successors, (623), 307 states have internal predecessors, (623), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:31:02,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:31:02,362 INFO L93 Difference]: Finished difference Result 656 states and 717 transitions. [2022-03-18 22:31:02,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 308 states. [2022-03-18 22:31:02,363 INFO L78 Accepts]: Start accepts. Automaton has has 308 states, 308 states have (on average 2.022727272727273) internal successors, (623), 307 states have internal predecessors, (623), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 587 [2022-03-18 22:31:02,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:31:02,365 INFO L225 Difference]: With dead ends: 656 [2022-03-18 22:31:02,365 INFO L226 Difference]: Without dead ends: 622 [2022-03-18 22:31:02,378 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1786 GetRequests, 1175 SyntacticMatches, 0 SemanticMatches, 611 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46725 ImplicationChecksByTransitivity, 52.0s TimeCoverageRelationStatistics Valid=140913, Invalid=234243, Unknown=0, NotChecked=0, Total=375156 [2022-03-18 22:31:02,379 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 906 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 1275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1275 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 22:31:02,379 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [906 Valid, 63 Invalid, 1946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1275 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 22:31:02,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-03-18 22:31:02,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2022-03-18 22:31:02,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 617 states have (on average 1.0502431118314424) internal successors, (648), 617 states have internal predecessors, (648), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:31:02,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 652 transitions. [2022-03-18 22:31:02,393 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 652 transitions. Word has length 587 [2022-03-18 22:31:02,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:31:02,393 INFO L478 AbstractCegarLoop]: Abstraction has 622 states and 652 transitions. [2022-03-18 22:31:02,394 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 308 states, 308 states have (on average 2.022727272727273) internal successors, (623), 307 states have internal predecessors, (623), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:31:02,394 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 652 transitions. [2022-03-18 22:31:02,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2022-03-18 22:31:02,400 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:31:02,400 INFO L500 BasicCegarLoop]: trace histogram [305, 275, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:31:02,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 22:31:02,615 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,SelfDestructingSolverStorable11 [2022-03-18 22:31:02,615 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:31:02,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:31:02,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1496477562, now seen corresponding path program 10 times [2022-03-18 22:31:02,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:31:02,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491640585] [2022-03-18 22:31:02,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:31:02,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:31:02,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:31:22,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:31:22,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:31:22,832 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-18 22:31:22,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:31:22,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491640585] [2022-03-18 22:31:22,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491640585] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:31:22,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71197736] [2022-03-18 22:31:22,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:31:22,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:31:22,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:31:22,834 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) [2022-03-18 22:31:22,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 22:31:22,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:31:22,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:31:22,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 1333 conjuncts, 277 conjunts are in the unsatisfiable core [2022-03-18 22:31:22,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:31:23,902 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-18 22:31:23,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:32:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-18 22:32:25,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71197736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:32:25,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:32:25,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [279, 278, 278] total 556 [2022-03-18 22:32:25,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206971467] [2022-03-18 22:32:25,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:32:25,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 556 states [2022-03-18 22:32:25,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:32:25,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 556 interpolants. [2022-03-18 22:32:25,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153737, Invalid=154843, Unknown=0, NotChecked=0, Total=308580 [2022-03-18 22:32:25,271 INFO L87 Difference]: Start difference. First operand 622 states and 652 transitions. Second operand has 556 states, 556 states have (on average 2.0107913669064748) internal successors, (1118), 555 states have internal predecessors, (1118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:33:56,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:33:56,660 INFO L93 Difference]: Finished difference Result 1242 states and 1579 transitions. [2022-03-18 22:33:56,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 555 states. [2022-03-18 22:33:56,661 INFO L78 Accepts]: Start accepts. Automaton has has 556 states, 556 states have (on average 2.0107913669064748) internal successors, (1118), 555 states have internal predecessors, (1118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 621 [2022-03-18 22:33:56,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:33:56,665 INFO L225 Difference]: With dead ends: 1242 [2022-03-18 22:33:56,665 INFO L226 Difference]: Without dead ends: 1176 [2022-03-18 22:33:56,725 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 2073 GetRequests, 967 SyntacticMatches, 0 SemanticMatches, 1106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191676 ImplicationChecksByTransitivity, 162.8s TimeCoverageRelationStatistics Valid=460098, Invalid=766458, Unknown=0, NotChecked=0, Total=1226556 [2022-03-18 22:33:56,726 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 560 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 839 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 839 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:33:56,726 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 44 Invalid, 1984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [839 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 22:33:56,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-03-18 22:33:56,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1176. [2022-03-18 22:33:56,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1171 states have (on average 1.026473099914603) internal successors, (1202), 1171 states have internal predecessors, (1202), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:33:56,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1206 transitions. [2022-03-18 22:33:56,751 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1206 transitions. Word has length 621 [2022-03-18 22:33:56,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:33:56,752 INFO L478 AbstractCegarLoop]: Abstraction has 1176 states and 1206 transitions. [2022-03-18 22:33:56,752 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 556 states, 556 states have (on average 2.0107913669064748) internal successors, (1118), 555 states have internal predecessors, (1118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:33:56,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1206 transitions. [2022-03-18 22:33:56,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1176 [2022-03-18 22:33:56,762 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:33:56,762 INFO L500 BasicCegarLoop]: trace histogram [582, 552, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:33:56,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 22:33:56,964 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,SelfDestructingSolverStorable12 [2022-03-18 22:33:56,964 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:33:56,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:33:56,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1282836636, now seen corresponding path program 11 times [2022-03-18 22:33:56,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:33:56,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987981827] [2022-03-18 22:33:56,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:33:56,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:33:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:35:19,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:35:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:35:19,254 INFO L134 CoverageAnalysis]: Checked inductivity of 338724 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-18 22:35:19,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:35:19,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987981827] [2022-03-18 22:35:19,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987981827] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:35:19,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093097367] [2022-03-18 22:35:19,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:35:19,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:35:19,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:35:19,256 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) [2022-03-18 22:35:19,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 22:35:21,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 583 check-sat command(s) [2022-03-18 22:35:21,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:35:21,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 2441 conjuncts, 554 conjunts are in the unsatisfiable core [2022-03-18 22:35:21,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:35:23,157 INFO L134 CoverageAnalysis]: Checked inductivity of 338724 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-18 22:35:23,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:39:35,394 INFO L134 CoverageAnalysis]: Checked inductivity of 338724 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-18 22:39:35,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093097367] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:39:35,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:39:35,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [556, 555, 555] total 1110 [2022-03-18 22:39:35,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992039681] [2022-03-18 22:39:35,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:39:35,398 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 1110 states [2022-03-18 22:39:35,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:39:35,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1110 interpolants. [2022-03-18 22:39:35,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=614388, Invalid=616602, Unknown=0, NotChecked=0, Total=1230990 [2022-03-18 22:39:35,551 INFO L87 Difference]: Start difference. First operand 1176 states and 1206 transitions. Second operand has 1110 states, 1110 states have (on average 2.0054054054054054) internal successors, (2226), 1109 states have internal predecessors, (2226), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)