/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/Mono5_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 19:59:27,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 19:59:27,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 19:59:27,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 19:59:27,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 19:59:27,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 19:59:27,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 19:59:27,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 19:59:27,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 19:59:27,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 19:59:27,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 19:59:27,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 19:59:27,753 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 19:59:27,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 19:59:27,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 19:59:27,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 19:59:27,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 19:59:27,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 19:59:27,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 19:59:27,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 19:59:27,764 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 19:59:27,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 19:59:27,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 19:59:27,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 19:59:27,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 19:59:27,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-17 19:59:27,771 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-17 19:59:27,772 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-17 19:59:27,772 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-17 19:59:27,772 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-17 19:59:27,773 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-17 19:59:27,773 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-17 19:59:27,774 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-17 19:59:27,775 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-17 19:59:27,775 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-17 19:59:27,776 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-17 19:59:27,776 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-17 19:59:27,776 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-17 19:59:27,776 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-17 19:59:27,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 19:59:27,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 19:59:27,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 19:59:27,778 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 19:59:27,799 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 19:59:27,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 19:59:27,801 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 19:59:27,801 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 19:59:27,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 19:59:27,802 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 19:59:27,802 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 19:59:27,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 19:59:27,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 19:59:27,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 19:59:27,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 19:59:27,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 19:59:27,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 19:59:27,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 19:59:27,803 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 19:59:27,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 19:59:27,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 19:59:27,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 19:59:27,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 19:59:27,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 19:59:27,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 19:59:27,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 19:59:27,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 19:59:27,804 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 19:59:27,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 19:59:27,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 19:59:27,804 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 19:59:27,804 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 19:59:27,805 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 19:59:27,805 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 19:59:27,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 19:59:28,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 19:59:28,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 19:59:28,009 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 19:59:28,010 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 19:59:28,010 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono5_1.c [2022-03-17 19:59:28,058 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2952a9f9/e9e724fe90414204acc4b476d67640b4/FLAG47dc53425 [2022-03-17 19:59:28,416 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 19:59:28,417 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono5_1.c [2022-03-17 19:59:28,426 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2952a9f9/e9e724fe90414204acc4b476d67640b4/FLAG47dc53425 [2022-03-17 19:59:28,439 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2952a9f9/e9e724fe90414204acc4b476d67640b4 [2022-03-17 19:59:28,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 19:59:28,442 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 19:59:28,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 19:59:28,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 19:59:28,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 19:59:28,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:59:28" (1/1) ... [2022-03-17 19:59:28,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@775dc865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:59:28, skipping insertion in model container [2022-03-17 19:59:28,449 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:59:28" (1/1) ... [2022-03-17 19:59:28,454 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 19:59:28,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 19:59:28,590 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/Mono5_1.c[311,324] [2022-03-17 19:59:28,613 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 19:59:28,618 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 19:59:28,626 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/Mono5_1.c[311,324] [2022-03-17 19:59:28,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 19:59:28,635 INFO L208 MainTranslator]: Completed translation [2022-03-17 19:59:28,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:59:28 WrapperNode [2022-03-17 19:59:28,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 19:59:28,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 19:59:28,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 19:59:28,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 19:59:28,643 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:59:28" (1/1) ... [2022-03-17 19:59:28,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:59:28" (1/1) ... [2022-03-17 19:59:28,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:59:28" (1/1) ... [2022-03-17 19:59:28,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:59:28" (1/1) ... [2022-03-17 19:59:28,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:59:28" (1/1) ... [2022-03-17 19:59:28,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:59:28" (1/1) ... [2022-03-17 19:59:28,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:59:28" (1/1) ... [2022-03-17 19:59:28,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 19:59:28,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 19:59:28,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 19:59:28,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 19:59:28,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:59:28" (1/1) ... [2022-03-17 19:59:28,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 19:59:28,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:59:28,676 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 19:59:28,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 19:59:28,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 19:59:28,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 19:59:28,705 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 19:59:28,705 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 19:59:28,705 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 19:59:28,705 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 19:59:28,705 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 19:59:28,706 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 19:59:28,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 19:59:28,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 19:59:28,707 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 19:59:28,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 19:59:28,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 19:59:28,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 19:59:28,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 19:59:28,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 19:59:28,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 19:59:28,755 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 19:59:28,756 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 19:59:28,881 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 19:59:28,885 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 19:59:28,885 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 19:59:28,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:59:28 BoogieIcfgContainer [2022-03-17 19:59:28,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 19:59:28,887 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 19:59:28,887 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 19:59:28,887 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 19:59:28,889 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:59:28" (1/1) ... [2022-03-17 19:59:28,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 07:59:28 BasicIcfg [2022-03-17 19:59:28,903 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 19:59:28,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 19:59:28,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 19:59:28,911 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 19:59:28,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 07:59:28" (1/4) ... [2022-03-17 19:59:28,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b3253c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:59:28, skipping insertion in model container [2022-03-17 19:59:28,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:59:28" (2/4) ... [2022-03-17 19:59:28,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b3253c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:59:28, skipping insertion in model container [2022-03-17 19:59:28,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:59:28" (3/4) ... [2022-03-17 19:59:28,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b3253c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 07:59:28, skipping insertion in model container [2022-03-17 19:59:28,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 07:59:28" (4/4) ... [2022-03-17 19:59:28,912 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono5_1.cqvasr [2022-03-17 19:59:28,915 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 19:59:28,916 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 19:59:28,946 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 19:59:28,951 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 [2022-03-17 19:59:28,951 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 19:59:28,960 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) [2022-03-17 19:59:28,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 19:59:28,963 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:59:28,963 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:59:28,964 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:59:28,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:59:28,970 INFO L85 PathProgramCache]: Analyzing trace with hash -154368955, now seen corresponding path program 1 times [2022-03-17 19:59:28,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:59:28,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086506262] [2022-03-17 19:59:28,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:59:28,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:59:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:59:29,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:59:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:59:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:59:29,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:59:29,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086506262] [2022-03-17 19:59:29,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086506262] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:59:29,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 19:59:29,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 19:59:29,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7442235] [2022-03-17 19:59:29,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:59:29,111 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 19:59:29,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:59:29,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 19:59:29,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 19:59:29,128 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) [2022-03-17 19:59:29,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:59:29,149 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-03-17 19:59:29,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 19:59:29,151 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 [2022-03-17 19:59:29,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:59:29,154 INFO L225 Difference]: With dead ends: 31 [2022-03-17 19:59:29,154 INFO L226 Difference]: Without dead ends: 14 [2022-03-17 19:59:29,156 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 [2022-03-17 19:59:29,158 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 [2022-03-17 19:59:29,159 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] [2022-03-17 19:59:29,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-17 19:59:29,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-17 19:59:29,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2022-03-17 19:59:29,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-03-17 19:59:29,178 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-03-17 19:59:29,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:59:29,179 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-03-17 19:59:29,179 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) [2022-03-17 19:59:29,179 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-03-17 19:59:29,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 19:59:29,179 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:59:29,180 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:59:29,180 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 19:59:29,180 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:59:29,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:59:29,181 INFO L85 PathProgramCache]: Analyzing trace with hash -153445434, now seen corresponding path program 1 times [2022-03-17 19:59:29,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:59:29,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208958404] [2022-03-17 19:59:29,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:59:29,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:59:29,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:59:29,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:59:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:59:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:59:29,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:59:29,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208958404] [2022-03-17 19:59:29,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208958404] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:59:29,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 19:59:29,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 19:59:29,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463248712] [2022-03-17 19:59:29,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:59:29,301 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 19:59:29,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:59:29,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 19:59:29,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 19:59:29,304 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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) [2022-03-17 19:59:29,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:59:29,360 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-03-17 19:59:29,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 19:59:29,360 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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 [2022-03-17 19:59:29,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:59:29,361 INFO L225 Difference]: With dead ends: 22 [2022-03-17 19:59:29,361 INFO L226 Difference]: Without dead ends: 17 [2022-03-17 19:59:29,361 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-17 19:59:29,362 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:59:29,363 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 31 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:59:29,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-17 19:59:29,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-17 19:59:29,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2022-03-17 19:59:29,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-17 19:59:29,366 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-03-17 19:59:29,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:59:29,366 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-17 19:59:29,367 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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) [2022-03-17 19:59:29,367 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-17 19:59:29,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-17 19:59:29,367 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:59:29,367 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:59:29,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 19:59:29,368 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:59:29,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:59:29,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1203653974, now seen corresponding path program 1 times [2022-03-17 19:59:29,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:59:29,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779103608] [2022-03-17 19:59:29,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:59:29,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:59:29,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:59:29,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:59:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:59:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:59:29,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:59:29,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779103608] [2022-03-17 19:59:29,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779103608] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:59:29,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 19:59:29,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 19:59:29,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747522353] [2022-03-17 19:59:29,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:59:29,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 19:59:29,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:59:29,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 19:59:29,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 19:59:29,443 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-03-17 19:59:29,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:59:29,465 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-03-17 19:59:29,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 19:59:29,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 14 [2022-03-17 19:59:29,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:59:29,466 INFO L225 Difference]: With dead ends: 28 [2022-03-17 19:59:29,466 INFO L226 Difference]: Without dead ends: 20 [2022-03-17 19:59:29,467 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 19:59:29,468 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:59:29,468 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 19 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:59:29,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-17 19:59:29,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-03-17 19:59:29,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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) [2022-03-17 19:59:29,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-03-17 19:59:29,472 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2022-03-17 19:59:29,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:59:29,472 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-03-17 19:59:29,472 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-03-17 19:59:29,472 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-03-17 19:59:29,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 19:59:29,472 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:59:29,473 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:59:29,473 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-17 19:59:29,473 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:59:29,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:59:29,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1828446949, now seen corresponding path program 1 times [2022-03-17 19:59:29,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:59:29,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989214535] [2022-03-17 19:59:29,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:59:29,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:59:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:59:29,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:59:29,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:59:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:59:29,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:59:29,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989214535] [2022-03-17 19:59:29,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989214535] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:59:29,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219572212] [2022-03-17 19:59:29,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:59:29,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:59:29,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:59:29,571 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:59:29,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 19:59:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:59:29,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 19:59:29,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:59:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 19:59:29,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:59:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 19:59:29,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219572212] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:59:29,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:59:29,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2022-03-17 19:59:29,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425862890] [2022-03-17 19:59:29,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:59:29,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 19:59:29,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:59:29,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 19:59:29,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-17 19:59:29,795 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:59:29,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:59:29,960 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-03-17 19:59:29,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 19:59:29,960 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-17 19:59:29,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:59:29,961 INFO L225 Difference]: With dead ends: 45 [2022-03-17 19:59:29,961 INFO L226 Difference]: Without dead ends: 32 [2022-03-17 19:59:29,962 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-03-17 19:59:29,963 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 19:59:29,964 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 55 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 19:59:29,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-17 19:59:29,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-03-17 19:59:29,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 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) [2022-03-17 19:59:29,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-03-17 19:59:29,971 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 17 [2022-03-17 19:59:29,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:59:29,972 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-03-17 19:59:29,972 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:59:29,972 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-03-17 19:59:29,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 19:59:29,973 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:59:29,973 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:59:29,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 19:59:30,173 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:59:30,174 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:59:30,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:59:30,174 INFO L85 PathProgramCache]: Analyzing trace with hash -976700890, now seen corresponding path program 2 times [2022-03-17 19:59:30,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:59:30,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292816402] [2022-03-17 19:59:30,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:59:30,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:59:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:59:30,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:59:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:59:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 19:59:30,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:59:30,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292816402] [2022-03-17 19:59:30,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292816402] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:59:30,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652196053] [2022-03-17 19:59:30,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 19:59:30,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:59:30,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:59:30,295 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:59:30,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 19:59:30,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 19:59:30,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:59:30,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-17 19:59:30,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:59:30,430 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-17 19:59:30,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:59:30,587 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-17 19:59:30,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652196053] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:59:30,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:59:30,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 18 [2022-03-17 19:59:30,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441937018] [2022-03-17 19:59:30,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:59:30,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-17 19:59:30,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:59:30,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-17 19:59:30,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-17 19:59:30,589 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:59:31,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:59:31,075 INFO L93 Difference]: Finished difference Result 78 states and 100 transitions. [2022-03-17 19:59:31,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-17 19:59:31,076 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-17 19:59:31,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:59:31,077 INFO L225 Difference]: With dead ends: 78 [2022-03-17 19:59:31,077 INFO L226 Difference]: Without dead ends: 53 [2022-03-17 19:59:31,077 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056 [2022-03-17 19:59:31,078 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 124 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 19:59:31,078 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 74 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 19:59:31,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-17 19:59:31,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-03-17 19:59:31,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 47 states have internal predecessors, (59), 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) [2022-03-17 19:59:31,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-03-17 19:59:31,084 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 29 [2022-03-17 19:59:31,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:59:31,084 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-03-17 19:59:31,084 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:59:31,085 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-03-17 19:59:31,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-17 19:59:31,085 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:59:31,085 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:59:31,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 19:59:31,301 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:59:31,302 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:59:31,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:59:31,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1868071817, now seen corresponding path program 3 times [2022-03-17 19:59:31,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:59:31,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040884386] [2022-03-17 19:59:31,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:59:31,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:59:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:59:31,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:59:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:59:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 106 proven. 15 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-17 19:59:31,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:59:31,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040884386] [2022-03-17 19:59:31,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040884386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:59:31,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905948392] [2022-03-17 19:59:31,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 19:59:31,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:59:31,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:59:31,401 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:59:31,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 19:59:31,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-03-17 19:59:31,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:59:31,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-17 19:59:31,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:59:31,617 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 106 proven. 15 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-17 19:59:31,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:59:31,770 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 106 proven. 15 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-17 19:59:31,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905948392] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:59:31,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:59:31,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-03-17 19:59:31,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661745374] [2022-03-17 19:59:31,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:59:31,771 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-17 19:59:31,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:59:31,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-17 19:59:31,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2022-03-17 19:59:31,772 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 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) [2022-03-17 19:59:32,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:59:32,244 INFO L93 Difference]: Finished difference Result 112 states and 138 transitions. [2022-03-17 19:59:32,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-17 19:59:32,245 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 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 50 [2022-03-17 19:59:32,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:59:32,245 INFO L225 Difference]: With dead ends: 112 [2022-03-17 19:59:32,245 INFO L226 Difference]: Without dead ends: 77 [2022-03-17 19:59:32,246 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=235, Invalid=577, Unknown=0, NotChecked=0, Total=812 [2022-03-17 19:59:32,247 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 19:59:32,247 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 44 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 19:59:32,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-17 19:59:32,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2022-03-17 19:59:32,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 62 states have internal predecessors, (74), 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) [2022-03-17 19:59:32,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-03-17 19:59:32,254 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 50 [2022-03-17 19:59:32,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:59:32,254 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-03-17 19:59:32,254 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 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) [2022-03-17 19:59:32,254 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-03-17 19:59:32,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-17 19:59:32,255 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:59:32,255 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:59:32,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 19:59:32,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:59:32,460 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:59:32,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:59:32,460 INFO L85 PathProgramCache]: Analyzing trace with hash -31358138, now seen corresponding path program 4 times [2022-03-17 19:59:32,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:59:32,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542576166] [2022-03-17 19:59:32,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:59:32,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:59:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:59:32,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:59:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:59:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 251 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-17 19:59:32,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:59:32,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542576166] [2022-03-17 19:59:32,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542576166] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:59:32,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814556555] [2022-03-17 19:59:32,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 19:59:32,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:59:32,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:59:32,617 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:59:32,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 19:59:32,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 19:59:32,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:59:32,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-17 19:59:32,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:59:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 377 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-17 19:59:32,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:59:33,267 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 377 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-17 19:59:33,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814556555] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:59:33,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:59:33,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 36 [2022-03-17 19:59:33,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757859844] [2022-03-17 19:59:33,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:59:33,269 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-17 19:59:33,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:59:33,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-17 19:59:33,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2022-03-17 19:59:33,270 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 36 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 34 states have internal predecessors, (107), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:59:41,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:59:41,625 INFO L93 Difference]: Finished difference Result 156 states and 202 transitions. [2022-03-17 19:59:41,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-17 19:59:41,625 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 34 states have internal predecessors, (107), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-03-17 19:59:41,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:59:41,626 INFO L225 Difference]: With dead ends: 156 [2022-03-17 19:59:41,626 INFO L226 Difference]: Without dead ends: 107 [2022-03-17 19:59:41,628 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=916, Invalid=3776, Unknown=0, NotChecked=0, Total=4692 [2022-03-17 19:59:41,628 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 441 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 1621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-17 19:59:41,628 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 157 Invalid, 1621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1547 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-17 19:59:41,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-17 19:59:41,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-03-17 19:59:41,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.2376237623762376) internal successors, (125), 101 states have internal predecessors, (125), 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) [2022-03-17 19:59:41,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 129 transitions. [2022-03-17 19:59:41,637 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 129 transitions. Word has length 65 [2022-03-17 19:59:41,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:59:41,637 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 129 transitions. [2022-03-17 19:59:41,637 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 34 states have internal predecessors, (107), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:59:41,637 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 129 transitions. [2022-03-17 19:59:41,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-17 19:59:41,638 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:59:41,638 INFO L500 BasicCegarLoop]: trace histogram [31, 31, 22, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:59:41,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-17 19:59:41,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:59:41,851 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:59:41,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:59:41,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1862805289, now seen corresponding path program 5 times [2022-03-17 19:59:41,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:59:41,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43966687] [2022-03-17 19:59:41,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:59:41,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:59:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:59:42,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:59:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:59:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 628 proven. 126 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-03-17 19:59:42,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:59:42,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43966687] [2022-03-17 19:59:42,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43966687] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:59:42,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998828127] [2022-03-17 19:59:42,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 19:59:42,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:59:42,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:59:42,048 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:59:42,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 19:59:55,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2022-03-17 19:59:55,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:59:55,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-17 19:59:55,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:59:56,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1300 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-17 19:59:56,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:59:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1300 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-17 19:59:57,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998828127] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:59:57,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:59:57,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 27, 27] total 61 [2022-03-17 19:59:57,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017335547] [2022-03-17 19:59:57,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:59:57,493 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-17 19:59:57,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:59:57,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-17 19:59:57,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=657, Invalid=3003, Unknown=0, NotChecked=0, Total=3660 [2022-03-17 19:59:57,495 INFO L87 Difference]: Start difference. First operand 106 states and 129 transitions. Second operand has 61 states, 61 states have (on average 2.9836065573770494) internal successors, (182), 59 states have internal predecessors, (182), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 20:01:02,249 WARN L232 SmtUtils]: Spent 38.17s on a formula simplification that was a NOOP. DAG size: 123 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:01:04,588 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_#NULL.base| |c_old(#NULL.base)|) (not (= 0 (mod (+ 4294967288 c_main_~z~0) 4294967296))) (not (= (mod (+ 4294967293 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967276 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967275 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ c_main_~z~0 4294967277) 4294967296) 0)) (not (= (mod (+ 4294967290 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ c_main_~z~0 4294967280) 4294967296) 0)) (not (= (mod (+ 4294967291 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967287 c_main_~z~0) 4294967296) 0)) (not (= (mod c_main_~z~0 4294967296) 0)) (not (= (mod (+ 4294967282 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967295 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967279 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967294 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967285 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967278 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967283 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967281 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967284 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967286 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967292 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967289 c_main_~z~0) 4294967296) 0)) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-03-17 20:01:06,606 WARN L833 $PredicateComparison]: unable to prove that (and (not (= 0 (mod (+ 4294967288 c_main_~z~0) 4294967296))) (not (= (mod (+ 4294967293 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967276 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967275 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ c_main_~z~0 4294967277) 4294967296) 0)) (not (= (mod (+ 4294967290 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ c_main_~z~0 4294967280) 4294967296) 0)) (not (= (mod (+ 4294967291 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967287 c_main_~z~0) 4294967296) 0)) (not (= (mod c_main_~z~0 4294967296) 0)) (not (= (mod (+ 4294967282 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967295 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967279 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967294 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967285 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967278 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967283 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967281 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967284 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967286 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967292 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967289 c_main_~z~0) 4294967296) 0))) is different from false [2022-03-17 20:01:59,097 WARN L232 SmtUtils]: Spent 27.84s on a formula simplification that was a NOOP. DAG size: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:02:56,860 WARN L232 SmtUtils]: Spent 31.61s on a formula simplification that was a NOOP. DAG size: 113 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:02:58,871 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_#NULL.base| |c_old(#NULL.base)|) (not (= 0 (mod (+ 4294967288 c_main_~z~0) 4294967296))) (not (= (mod (+ 4294967293 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967276 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967275 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ c_main_~z~0 4294967277) 4294967296) 0)) (not (= (mod (+ 4294967290 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ c_main_~z~0 4294967280) 4294967296) 0)) (not (= (mod (+ 4294967291 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967287 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967282 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967295 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967279 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967294 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967285 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967278 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967283 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967281 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967284 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967286 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967292 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967289 c_main_~z~0) 4294967296) 0)) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-03-17 20:03:00,633 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 20:03:41,477 WARN L232 SmtUtils]: Spent 24.69s on a formula simplification that was a NOOP. DAG size: 108 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:04:34,021 WARN L232 SmtUtils]: Spent 29.64s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:05:20,776 WARN L232 SmtUtils]: Spent 20.65s on a formula simplification that was a NOOP. DAG size: 103 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:05:47,911 WARN L232 SmtUtils]: Spent 13.29s on a formula simplification that was a NOOP. DAG size: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:06:16,936 WARN L232 SmtUtils]: Spent 11.11s on a formula simplification that was a NOOP. DAG size: 93 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:06:19,515 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_#NULL.base| |c_old(#NULL.base)|) (not (= 0 (mod (+ 4294967288 c_main_~z~0) 4294967296))) (not (= (mod (+ 4294967293 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967290 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967291 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967287 c_main_~z~0) 4294967296) 0)) (not (= (mod c_main_~z~0 4294967296) 0)) (not (= (mod (+ 4294967282 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967295 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967294 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967285 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967283 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967281 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967284 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967286 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967292 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967289 c_main_~z~0) 4294967296) 0)) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-03-17 20:06:54,199 WARN L232 SmtUtils]: Spent 8.29s on a formula simplification that was a NOOP. DAG size: 83 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:06:56,205 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_#NULL.base| |c_old(#NULL.base)|) (not (= 0 (mod (+ 4294967288 c_main_~z~0) 4294967296))) (not (= (mod (+ 4294967293 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967290 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967291 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967287 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967282 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967295 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967294 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967285 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967283 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967281 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967284 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967286 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967292 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967289 c_main_~z~0) 4294967296) 0)) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-03-17 20:07:10,173 WARN L232 SmtUtils]: Spent 5.24s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:07:36,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:07:36,496 INFO L93 Difference]: Finished difference Result 288 states and 385 transitions. [2022-03-17 20:07:36,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-17 20:07:36,496 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.9836065573770494) internal successors, (182), 59 states have internal predecessors, (182), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-03-17 20:07:36,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:07:36,498 INFO L225 Difference]: With dead ends: 288 [2022-03-17 20:07:36,498 INFO L226 Difference]: Without dead ends: 192 [2022-03-17 20:07:36,501 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1881 ImplicationChecksByTransitivity, 450.9s TimeCoverageRelationStatistics Valid=3052, Invalid=11223, Unknown=25, NotChecked=1200, Total=15500 [2022-03-17 20:07:36,501 INFO L912 BasicCegarLoop]: 76 mSDtfsCounter, 1201 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 3615 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1201 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 3744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 3615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-03-17 20:07:36,502 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1201 Valid, 240 Invalid, 3744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 3615 Invalid, 0 Unknown, 24 Unchecked, 9.3s Time] [2022-03-17 20:07:36,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-03-17 20:07:36,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 186. [2022-03-17 20:07:36,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.281767955801105) internal successors, (232), 181 states have internal predecessors, (232), 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) [2022-03-17 20:07:36,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 236 transitions. [2022-03-17 20:07:36,516 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 236 transitions. Word has length 104 [2022-03-17 20:07:36,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:07:36,516 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 236 transitions. [2022-03-17 20:07:36,517 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.9836065573770494) internal successors, (182), 59 states have internal predecessors, (182), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 20:07:36,517 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 236 transitions. [2022-03-17 20:07:36,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-17 20:07:36,518 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:07:36,518 INFO L500 BasicCegarLoop]: trace histogram [35, 35, 24, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:07:36,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 20:07:36,724 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:07:36,724 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:07:36,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:07:36,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1011259575, now seen corresponding path program 6 times [2022-03-17 20:07:36,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:07:36,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255026476] [2022-03-17 20:07:36,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:07:36,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:07:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:07:36,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:07:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:07:36,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 789 proven. 155 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2022-03-17 20:07:36,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:07:36,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255026476] [2022-03-17 20:07:36,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255026476] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:07:36,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266474371] [2022-03-17 20:07:36,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 20:07:36,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:07:36,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:07:36,906 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:07:36,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 20:07:36,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-17 20:07:36,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 20:07:36,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 20:07:36,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:07:37,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-03-17 20:07:37,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:07:37,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266474371] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:07:37,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 20:07:37,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2022-03-17 20:07:37,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505249500] [2022-03-17 20:07:37,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:07:37,194 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 20:07:37,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:07:37,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 20:07:37,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-03-17 20:07:37,194 INFO L87 Difference]: Start difference. First operand 186 states and 236 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 20:07:37,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:07:37,251 INFO L93 Difference]: Finished difference Result 414 states and 509 transitions. [2022-03-17 20:07:37,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 20:07:37,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 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 116 [2022-03-17 20:07:37,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:07:37,255 INFO L225 Difference]: With dead ends: 414 [2022-03-17 20:07:37,255 INFO L226 Difference]: Without dead ends: 409 [2022-03-17 20:07:37,256 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-17 20:07:37,257 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:07:37,258 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 19 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:07:37,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-03-17 20:07:37,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 183. [2022-03-17 20:07:37,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.2696629213483146) internal successors, (226), 178 states have internal predecessors, (226), 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) [2022-03-17 20:07:37,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 230 transitions. [2022-03-17 20:07:37,292 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 230 transitions. Word has length 116 [2022-03-17 20:07:37,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:07:37,292 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 230 transitions. [2022-03-17 20:07:37,292 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 20:07:37,292 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 230 transitions. [2022-03-17 20:07:37,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-17 20:07:37,297 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:07:37,298 INFO L500 BasicCegarLoop]: trace histogram [37, 37, 25, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:07:37,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 20:07:37,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:07:37,511 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:07:37,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:07:37,512 INFO L85 PathProgramCache]: Analyzing trace with hash 624469782, now seen corresponding path program 7 times [2022-03-17 20:07:37,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:07:37,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346635983] [2022-03-17 20:07:37,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:07:37,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:07:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:07:37,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:07:37,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:07:37,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 853 proven. 155 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2022-03-17 20:07:37,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:07:37,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346635983] [2022-03-17 20:07:37,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346635983] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:07:37,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543143524] [2022-03-17 20:07:37,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-17 20:07:37,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:07:37,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:07:37,700 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:07:37,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 20:07:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:07:37,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-17 20:07:37,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:07:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 1871 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-03-17 20:07:38,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:07:39,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 1871 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-03-17 20:07:39,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543143524] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:07:39,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 20:07:39,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 30, 30] total 68 [2022-03-17 20:07:39,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612379930] [2022-03-17 20:07:39,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 20:07:39,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-17 20:07:39,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:07:39,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-17 20:07:39,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=819, Invalid=3737, Unknown=0, NotChecked=0, Total=4556 [2022-03-17 20:07:39,691 INFO L87 Difference]: Start difference. First operand 183 states and 230 transitions. Second operand has 68 states, 68 states have (on average 3.0294117647058822) internal successors, (206), 66 states have internal predecessors, (206), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 20:09:22,573 WARN L232 SmtUtils]: Spent 52.07s on a formula simplification that was a NOOP. DAG size: 138 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:09:24,642 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_#NULL.base| |c_old(#NULL.base)|) (not (= 0 (mod (+ 4294967288 c_main_~z~0) 4294967296))) (not (= (mod (+ 4294967293 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967276 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967275 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ c_main_~z~0 4294967277) 4294967296) 0)) (not (= (mod (+ 4294967290 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ c_main_~z~0 4294967280) 4294967296) 0)) (not (= (mod (+ 4294967291 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967287 c_main_~z~0) 4294967296) 0)) (not (= (mod c_main_~z~0 4294967296) 0)) (not (= (mod (+ 4294967282 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967295 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967279 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967294 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967285 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967278 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967283 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967281 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967284 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967286 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967272 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967292 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967289 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967273 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967274 c_main_~z~0) 4294967296) 0)) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-03-17 20:09:26,648 WARN L833 $PredicateComparison]: unable to prove that (and (not (= 0 (mod (+ 4294967288 c_main_~z~0) 4294967296))) (not (= (mod (+ 4294967293 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967276 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967275 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ c_main_~z~0 4294967277) 4294967296) 0)) (not (= (mod (+ 4294967290 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ c_main_~z~0 4294967280) 4294967296) 0)) (not (= (mod (+ 4294967291 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967287 c_main_~z~0) 4294967296) 0)) (not (= (mod c_main_~z~0 4294967296) 0)) (not (= (mod (+ 4294967282 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967295 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967279 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967294 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967285 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967278 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967283 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967281 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967284 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967286 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967272 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967292 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967289 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967273 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967274 c_main_~z~0) 4294967296) 0))) is different from false [2022-03-17 20:10:48,945 WARN L232 SmtUtils]: Spent 42.53s on a formula simplification that was a NOOP. DAG size: 124 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:12:08,886 WARN L232 SmtUtils]: Spent 44.92s on a formula simplification that was a NOOP. DAG size: 128 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:13:33,342 WARN L232 SmtUtils]: Spent 44.40s on a formula simplification that was a NOOP. DAG size: 130 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:13:38,921 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []