/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/nla-digbench-scaling/prodbin-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 00:02:25,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 00:02:25,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 00:02:25,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-24 00:02:25,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-24 00:02:25,841 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-24 00:02:25,844 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-24 00:02:25,849 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-24 00:02:25,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-24 00:02:25,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-24 00:02:25,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-24 00:02:25,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-24 00:02:25,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 00:02:25,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 00:02:25,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 00:02:25,857 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 00:02:25,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 00:02:25,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 00:02:25,859 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 00:02:25,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 00:02:25,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 00:02:25,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 00:02:25,864 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 00:02:25,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 00:02:25,873 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-24 00:02:25,873 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-24 00:02:25,873 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-24 00:02:25,874 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-24 00:02:25,875 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-24 00:02:25,875 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-24 00:02:25,875 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-24 00:02:25,876 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-24 00:02:25,877 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-24 00:02:25,877 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-24 00:02:25,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-24 00:02:25,879 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-24 00:02:25,879 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-24 00:02:25,879 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-24 00:02:25,879 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 00:02:25,880 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 00:02:25,880 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 00:02:25,881 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-24 00:02:25,906 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 00:02:25,907 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 00:02:25,907 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-24 00:02:25,908 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-24 00:02:25,908 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-24 00:02:25,908 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-24 00:02:25,908 INFO L138 SettingsManager]: * Use SBE=true [2022-02-24 00:02:25,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 00:02:25,909 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 00:02:25,909 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 00:02:25,909 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 00:02:25,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 00:02:25,910 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 00:02:25,910 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 00:02:25,910 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 00:02:25,910 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 00:02:25,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 00:02:25,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 00:02:25,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 00:02:25,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 00:02:25,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 00:02:25,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-24 00:02:25,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-24 00:02:25,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-24 00:02:25,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-24 00:02:25,911 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 00:02:25,911 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-24 00:02:25,911 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-24 00:02:25,912 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-24 00:02:25,912 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 00:02:26,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 00:02:26,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 00:02:26,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 00:02:26,101 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 00:02:26,102 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 00:02:26,103 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound5.c [2022-02-24 00:02:26,159 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1e24adef/09fefabb5c404b5895a3b8eff41be4a4/FLAGeaeb04c45 [2022-02-24 00:02:26,539 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 00:02:26,540 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound5.c [2022-02-24 00:02:26,543 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1e24adef/09fefabb5c404b5895a3b8eff41be4a4/FLAGeaeb04c45 [2022-02-24 00:02:26,551 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1e24adef/09fefabb5c404b5895a3b8eff41be4a4 [2022-02-24 00:02:26,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 00:02:26,553 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-24 00:02:26,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 00:02:26,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 00:02:26,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 00:02:26,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:02:26" (1/1) ... [2022-02-24 00:02:26,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@695663b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:02:26, skipping insertion in model container [2022-02-24 00:02:26,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:02:26" (1/1) ... [2022-02-24 00:02:26,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 00:02:26,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 00:02:26,711 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound5.c[537,550] [2022-02-24 00:02:26,724 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 00:02:26,733 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 00:02:26,744 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound5.c[537,550] [2022-02-24 00:02:26,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 00:02:26,766 INFO L208 MainTranslator]: Completed translation [2022-02-24 00:02:26,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:02:26 WrapperNode [2022-02-24 00:02:26,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 00:02:26,770 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 00:02:26,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 00:02:26,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 00:02:26,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:02:26" (1/1) ... [2022-02-24 00:02:26,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:02:26" (1/1) ... [2022-02-24 00:02:26,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:02:26" (1/1) ... [2022-02-24 00:02:26,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:02:26" (1/1) ... [2022-02-24 00:02:26,795 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:02:26" (1/1) ... [2022-02-24 00:02:26,798 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:02:26" (1/1) ... [2022-02-24 00:02:26,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:02:26" (1/1) ... [2022-02-24 00:02:26,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 00:02:26,805 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 00:02:26,805 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 00:02:26,805 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 00:02:26,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:02:26" (1/1) ... [2022-02-24 00:02:26,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 00:02:26,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:02:26,861 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) [2022-02-24 00:02:26,869 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 [2022-02-24 00:02:26,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 00:02:26,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 00:02:26,891 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 00:02:26,891 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-24 00:02:26,892 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 00:02:26,892 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 00:02:26,892 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 00:02:26,892 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 00:02:26,892 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 00:02:26,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 00:02:26,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 00:02:26,893 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-24 00:02:26,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 00:02:26,893 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 00:02:26,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 00:02:26,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 00:02:26,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 00:02:26,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 00:02:26,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 00:02:26,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 00:02:26,942 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 00:02:26,943 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 00:02:27,041 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 00:02:27,044 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 00:02:27,045 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 00:02:27,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:02:27 BoogieIcfgContainer [2022-02-24 00:02:27,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 00:02:27,059 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-24 00:02:27,059 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-24 00:02:27,060 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-24 00:02:27,062 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:02:27" (1/1) ... [2022-02-24 00:02:27,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 24.02 12:02:27 BasicIcfg [2022-02-24 00:02:27,086 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-24 00:02:27,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 00:02:27,087 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 00:02:27,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 00:02:27,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:02:26" (1/4) ... [2022-02-24 00:02:27,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6009a044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:02:27, skipping insertion in model container [2022-02-24 00:02:27,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:02:26" (2/4) ... [2022-02-24 00:02:27,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6009a044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:02:27, skipping insertion in model container [2022-02-24 00:02:27,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:02:27" (3/4) ... [2022-02-24 00:02:27,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6009a044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:02:27, skipping insertion in model container [2022-02-24 00:02:27,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 24.02 12:02:27" (4/4) ... [2022-02-24 00:02:27,091 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound5.cqvasr [2022-02-24 00:02:27,107 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-24 00:02:27,108 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 00:02:27,149 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 00:02:27,156 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mLoopAccelerationTechnique=FAST_UPR [2022-02-24 00:02:27,157 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 00:02:27,175 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 00:02:27,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 00:02:27,184 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:02:27,184 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:02:27,185 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:02:27,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:02:27,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1656134296, now seen corresponding path program 1 times [2022-02-24 00:02:27,204 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:02:27,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964543347] [2022-02-24 00:02:27,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:02:27,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:02:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:02:27,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:02:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:02:27,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 00:02:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:02:27,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 00:02:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:02:27,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 00:02:27,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:02:27,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-24 00:02:27,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:02:27,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964543347] [2022-02-24 00:02:27,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964543347] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:02:27,430 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:02:27,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 00:02:27,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481772104] [2022-02-24 00:02:27,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:02:27,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 00:02:27,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:02:27,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 00:02:27,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 00:02:27,469 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-24 00:02:27,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:02:27,548 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2022-02-24 00:02:27,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 00:02:27,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-02-24 00:02:27,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:02:27,555 INFO L225 Difference]: With dead ends: 57 [2022-02-24 00:02:27,555 INFO L226 Difference]: Without dead ends: 27 [2022-02-24 00:02:27,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 00:02:27,559 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 00:02:27,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 00:02:27,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-24 00:02:27,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-02-24 00:02:27,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 00:02:27,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-02-24 00:02:27,615 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 28 [2022-02-24 00:02:27,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:02:27,616 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-02-24 00:02:27,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-24 00:02:27,616 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-02-24 00:02:27,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 00:02:27,617 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:02:27,617 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:02:27,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 00:02:27,617 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:02:27,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:02:27,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1063826184, now seen corresponding path program 1 times [2022-02-24 00:02:27,618 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:02:27,618 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121461126] [2022-02-24 00:02:27,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:02:27,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:02:27,645 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:02:27,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262864900] [2022-02-24 00:02:27,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:02:27,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:02:27,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:02:27,668 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) [2022-02-24 00:02:27,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-24 00:02:27,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:02:27,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-24 00:02:27,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:02:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-24 00:02:27,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-24 00:02:27,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:02:27,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121461126] [2022-02-24 00:02:27,864 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:02:27,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262864900] [2022-02-24 00:02:27,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262864900] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:02:27,868 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:02:27,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 00:02:27,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845595235] [2022-02-24 00:02:27,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:02:27,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 00:02:27,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:02:27,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 00:02:27,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:02:27,876 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-24 00:02:27,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:02:27,929 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-02-24 00:02:27,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 00:02:27,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-02-24 00:02:27,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:02:27,930 INFO L225 Difference]: With dead ends: 39 [2022-02-24 00:02:27,930 INFO L226 Difference]: Without dead ends: 37 [2022-02-24 00:02:27,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-24 00:02:27,931 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:02:27,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 94 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:02:27,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-02-24 00:02:27,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2022-02-24 00:02:27,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 00:02:27,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-02-24 00:02:27,939 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 28 [2022-02-24 00:02:27,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:02:27,940 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-02-24 00:02:27,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-24 00:02:27,940 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-02-24 00:02:27,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 00:02:27,941 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:02:27,942 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:02:27,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-24 00:02:28,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:02:28,155 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:02:28,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:02:28,156 INFO L85 PathProgramCache]: Analyzing trace with hash -499634320, now seen corresponding path program 1 times [2022-02-24 00:02:28,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:02:28,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368610511] [2022-02-24 00:02:28,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:02:28,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:02:28,175 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:02:28,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149404643] [2022-02-24 00:02:28,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:02:28,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:02:28,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:02:28,178 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) [2022-02-24 00:02:28,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-24 00:02:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:02:28,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-24 00:02:28,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:02:28,283 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-24 00:02:28,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-24 00:02:28,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:02:28,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368610511] [2022-02-24 00:02:28,283 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:02:28,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149404643] [2022-02-24 00:02:28,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149404643] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:02:28,284 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:02:28,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 00:02:28,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902520958] [2022-02-24 00:02:28,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:02:28,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 00:02:28,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:02:28,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 00:02:28,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-24 00:02:28,285 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 00:02:28,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:02:28,328 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-02-24 00:02:28,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 00:02:28,328 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-02-24 00:02:28,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:02:28,330 INFO L225 Difference]: With dead ends: 43 [2022-02-24 00:02:28,330 INFO L226 Difference]: Without dead ends: 36 [2022-02-24 00:02:28,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-24 00:02:28,332 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:02:28,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 99 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:02:28,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-24 00:02:28,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-02-24 00:02:28,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 00:02:28,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-02-24 00:02:28,337 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 34 [2022-02-24 00:02:28,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:02:28,337 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-02-24 00:02:28,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 00:02:28,338 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-02-24 00:02:28,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-24 00:02:28,338 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:02:28,338 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:02:28,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-24 00:02:28,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-24 00:02:28,539 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:02:28,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:02:28,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1096608558, now seen corresponding path program 1 times [2022-02-24 00:02:28,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:02:28,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373520639] [2022-02-24 00:02:28,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:02:28,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:02:28,550 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:02:28,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570127139] [2022-02-24 00:02:28,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:02:28,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:02:28,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:02:28,562 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) [2022-02-24 00:02:28,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-24 00:02:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:02:28,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-24 00:02:28,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:02:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-24 00:02:29,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:02:39,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-24 00:02:39,615 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:02:39,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373520639] [2022-02-24 00:02:39,615 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:02:39,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570127139] [2022-02-24 00:02:39,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570127139] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-24 00:02:39,615 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-24 00:02:39,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-02-24 00:02:39,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693067620] [2022-02-24 00:02:39,616 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-24 00:02:39,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 00:02:39,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:02:39,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 00:02:39,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-02-24 00:02:39,617 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-24 00:02:41,916 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-24 00:02:45,968 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-24 00:02:46,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:02:46,129 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2022-02-24 00:02:46,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 00:02:46,129 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2022-02-24 00:02:46,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:02:46,131 INFO L225 Difference]: With dead ends: 52 [2022-02-24 00:02:46,131 INFO L226 Difference]: Without dead ends: 50 [2022-02-24 00:02:46,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-02-24 00:02:46,132 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-02-24 00:02:46,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 171 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 121 Invalid, 2 Unknown, 0 Unchecked, 5.3s Time] [2022-02-24 00:02:46,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-24 00:02:46,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-02-24 00:02:46,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 00:02:46,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-02-24 00:02:46,137 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 37 [2022-02-24 00:02:46,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:02:46,137 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-02-24 00:02:46,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-24 00:02:46,138 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-02-24 00:02:46,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-24 00:02:46,138 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:02:46,138 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:02:46,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-24 00:02:46,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:02:46,339 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:02:46,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:02:46,339 INFO L85 PathProgramCache]: Analyzing trace with hash -209104877, now seen corresponding path program 1 times [2022-02-24 00:02:46,339 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:02:46,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400315997] [2022-02-24 00:02:46,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:02:46,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:02:46,353 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:02:46,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602756295] [2022-02-24 00:02:46,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:02:46,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:02:46,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:02:46,369 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) [2022-02-24 00:02:46,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-24 00:02:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:02:46,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-24 00:02:46,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:02:49,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-24 00:02:49,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:02:50,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-24 00:02:50,764 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:02:50,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400315997] [2022-02-24 00:02:50,764 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:02:50,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602756295] [2022-02-24 00:02:50,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602756295] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-24 00:02:50,765 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-24 00:02:50,765 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2022-02-24 00:02:50,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112076888] [2022-02-24 00:02:50,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-24 00:02:50,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 00:02:50,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:02:50,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 00:02:50,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-02-24 00:02:50,766 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-24 00:02:51,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:02:51,523 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2022-02-24 00:02:51,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 00:02:51,524 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2022-02-24 00:02:51,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:02:51,525 INFO L225 Difference]: With dead ends: 66 [2022-02-24 00:02:51,525 INFO L226 Difference]: Without dead ends: 59 [2022-02-24 00:02:51,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-02-24 00:02:51,526 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 00:02:51,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 179 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 00:02:51,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-24 00:02:51,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-02-24 00:02:51,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-24 00:02:51,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-02-24 00:02:51,534 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 37 [2022-02-24 00:02:51,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:02:51,534 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-02-24 00:02:51,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-24 00:02:51,534 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-02-24 00:02:51,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-24 00:02:51,535 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:02:51,535 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:02:51,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-02-24 00:02:51,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:02:51,736 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:02:51,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:02:51,736 INFO L85 PathProgramCache]: Analyzing trace with hash -266261558, now seen corresponding path program 1 times [2022-02-24 00:02:51,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:02:51,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561264780] [2022-02-24 00:02:51,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:02:51,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:02:51,745 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:02:51,746 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677933836] [2022-02-24 00:02:51,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:02:51,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:02:51,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:02:51,768 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) [2022-02-24 00:02:51,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-24 00:02:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:02:51,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-24 00:02:51,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:02:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-24 00:02:51,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:02:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-24 00:02:52,099 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:02:52,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561264780] [2022-02-24 00:02:52,100 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:02:52,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677933836] [2022-02-24 00:02:52,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677933836] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-24 00:02:52,115 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-24 00:02:52,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-02-24 00:02:52,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344433528] [2022-02-24 00:02:52,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-24 00:02:52,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 00:02:52,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:02:52,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 00:02:52,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-02-24 00:02:52,117 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-24 00:02:54,125 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-24 00:02:56,170 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-24 00:02:56,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:02:56,190 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2022-02-24 00:02:56,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 00:02:56,190 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2022-02-24 00:02:56,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:02:56,191 INFO L225 Difference]: With dead ends: 65 [2022-02-24 00:02:56,191 INFO L226 Difference]: Without dead ends: 58 [2022-02-24 00:02:56,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-02-24 00:02:56,191 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 13 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-02-24 00:02:56,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 149 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 2 Unknown, 0 Unchecked, 4.1s Time] [2022-02-24 00:02:56,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-24 00:02:56,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-02-24 00:02:56,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 40 states have (on average 1.125) internal successors, (45), 42 states have internal predecessors, (45), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-24 00:02:56,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-02-24 00:02:56,200 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 43 [2022-02-24 00:02:56,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:02:56,200 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-02-24 00:02:56,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-24 00:02:56,200 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-02-24 00:02:56,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 00:02:56,201 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:02:56,201 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:02:56,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-24 00:02:56,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:02:56,402 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:02:56,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:02:56,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1353204359, now seen corresponding path program 1 times [2022-02-24 00:02:56,402 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:02:56,403 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569617045] [2022-02-24 00:02:56,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:02:56,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:02:56,410 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:02:56,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644201995] [2022-02-24 00:02:56,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:02:56,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:02:56,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:02:56,413 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) [2022-02-24 00:02:56,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-24 00:02:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:02:56,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-24 00:02:56,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:02:56,702 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-24 00:02:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-02-24 00:02:58,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:02:59,849 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:02:59,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569617045] [2022-02-24 00:02:59,850 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:02:59,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644201995] [2022-02-24 00:02:59,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644201995] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-24 00:02:59,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-24 00:02:59,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-02-24 00:02:59,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503260888] [2022-02-24 00:02:59,850 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-24 00:02:59,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 00:02:59,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:02:59,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 00:02:59,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-02-24 00:02:59,851 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-24 00:03:02,930 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-24 00:03:04,638 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-24 00:03:04,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:03:04,660 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2022-02-24 00:03:04,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 00:03:04,660 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2022-02-24 00:03:04,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:03:04,661 INFO L225 Difference]: With dead ends: 79 [2022-02-24 00:03:04,661 INFO L226 Difference]: Without dead ends: 77 [2022-02-24 00:03:04,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-02-24 00:03:04,662 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 16 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-02-24 00:03:04,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 218 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 133 Invalid, 0 Unknown, 19 Unchecked, 3.3s Time] [2022-02-24 00:03:04,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-24 00:03:04,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2022-02-24 00:03:04,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 52 states have internal predecessors, (55), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-24 00:03:04,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2022-02-24 00:03:04,669 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 46 [2022-02-24 00:03:04,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:03:04,669 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2022-02-24 00:03:04,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-24 00:03:04,669 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2022-02-24 00:03:04,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 00:03:04,670 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:03:04,670 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:03:04,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-02-24 00:03:04,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:03:04,886 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:03:04,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:03:04,887 INFO L85 PathProgramCache]: Analyzing trace with hash -172555565, now seen corresponding path program 2 times [2022-02-24 00:03:04,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:03:04,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713501556] [2022-02-24 00:03:04,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:03:04,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:03:04,914 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:03:04,914 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045999301] [2022-02-24 00:03:04,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-24 00:03:04,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:03:04,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:03:04,917 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) [2022-02-24 00:03:04,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-24 00:03:04,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-24 00:03:04,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-24 00:03:04,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-24 00:03:04,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:03:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-02-24 00:03:05,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:03:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-02-24 00:03:05,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:03:05,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713501556] [2022-02-24 00:03:05,658 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:03:05,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045999301] [2022-02-24 00:03:05,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045999301] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-24 00:03:05,658 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-24 00:03:05,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2022-02-24 00:03:05,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10448995] [2022-02-24 00:03:05,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-24 00:03:05,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 00:03:05,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:03:05,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 00:03:05,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-02-24 00:03:05,660 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-02-24 00:03:05,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:03:05,854 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2022-02-24 00:03:05,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 00:03:05,856 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 55 [2022-02-24 00:03:05,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:03:05,857 INFO L225 Difference]: With dead ends: 92 [2022-02-24 00:03:05,857 INFO L226 Difference]: Without dead ends: 67 [2022-02-24 00:03:05,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2022-02-24 00:03:05,858 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 00:03:05,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 191 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 129 Invalid, 0 Unknown, 2 Unchecked, 0.1s Time] [2022-02-24 00:03:05,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-02-24 00:03:05,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-02-24 00:03:05,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 49 states have internal predecessors, (49), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-24 00:03:05,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2022-02-24 00:03:05,863 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 55 [2022-02-24 00:03:05,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:03:05,864 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2022-02-24 00:03:05,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-02-24 00:03:05,864 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2022-02-24 00:03:05,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 00:03:05,864 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:03:05,864 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:03:05,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-24 00:03:06,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:03:06,083 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:03:06,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:03:06,084 INFO L85 PathProgramCache]: Analyzing trace with hash -683089742, now seen corresponding path program 3 times [2022-02-24 00:03:06,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:03:06,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295694866] [2022-02-24 00:03:06,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:03:06,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:03:06,103 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:03:06,103 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112614700] [2022-02-24 00:03:06,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-24 00:03:06,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:03:06,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:03:06,116 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-24 00:03:06,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-24 00:03:06,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-24 00:03:06,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-24 00:03:06,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-24 00:03:06,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:03:09,238 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-24 00:03:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-24 00:03:13,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:03:17,490 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-24 00:03:17,490 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:03:17,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295694866] [2022-02-24 00:03:17,491 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:03:17,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112614700] [2022-02-24 00:03:17,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112614700] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-24 00:03:17,491 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-24 00:03:17,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2022-02-24 00:03:17,491 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826254491] [2022-02-24 00:03:17,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-24 00:03:17,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 00:03:17,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:03:17,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 00:03:17,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=612, Unknown=3, NotChecked=0, Total=756 [2022-02-24 00:03:17,492 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 25 states have internal predecessors, (51), 11 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-02-24 00:03:23,578 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-24 00:03:28,278 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-24 00:03:32,748 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-24 00:03:32,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:03:32,749 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2022-02-24 00:03:32,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 00:03:32,750 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 25 states have internal predecessors, (51), 11 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 55 [2022-02-24 00:03:32,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:03:32,750 INFO L225 Difference]: With dead ends: 67 [2022-02-24 00:03:32,750 INFO L226 Difference]: Without dead ends: 0 [2022-02-24 00:03:32,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=268, Invalid=1061, Unknown=3, NotChecked=0, Total=1332 [2022-02-24 00:03:32,751 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-02-24 00:03:32,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 226 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 212 Invalid, 1 Unknown, 15 Unchecked, 6.5s Time] [2022-02-24 00:03:32,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-24 00:03:32,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-24 00:03:32,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-24 00:03:32,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-24 00:03:32,752 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 55 [2022-02-24 00:03:32,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:03:32,752 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-24 00:03:32,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 25 states have internal predecessors, (51), 11 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-02-24 00:03:32,752 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-24 00:03:32,752 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-24 00:03:32,754 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 00:03:32,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-24 00:03:32,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-02-24 00:03:32,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-02-24 00:03:45,507 WARN L232 SmtUtils]: Spent 12.51s on a formula simplification. DAG size of input: 104 DAG size of output: 48 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-02-24 00:03:50,367 INFO L854 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-02-24 00:03:50,367 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-02-24 00:03:50,367 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-02-24 00:03:50,367 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-02-24 00:03:50,367 INFO L861 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-02-24 00:03:50,367 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-02-24 00:03:50,367 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-02-24 00:03:50,367 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 9 11) the Hoare annotation is: true [2022-02-24 00:03:50,368 INFO L858 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2022-02-24 00:03:50,368 INFO L858 garLoopResultBuilder]: For program point L10-2(lines 9 11) no Hoare annotation was computed. [2022-02-24 00:03:50,368 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 9 11) no Hoare annotation was computed. [2022-02-24 00:03:50,368 INFO L861 garLoopResultBuilder]: At program point mainENTRY(lines 20 49) the Hoare annotation is: true [2022-02-24 00:03:50,368 INFO L861 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-02-24 00:03:50,368 INFO L858 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-02-24 00:03:50,368 INFO L861 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: true [2022-02-24 00:03:50,368 INFO L854 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (and (<= main_~b~0 5) (<= 0 main_~b~0)) [2022-02-24 00:03:50,368 INFO L858 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2022-02-24 00:03:50,368 INFO L854 garLoopResultBuilder]: At program point L34-2(lines 34 45) the Hoare annotation is: (let ((.cse4 (* main_~b~0 main_~a~0))) (let ((.cse1 (= (+ main_~z~0 (* main_~y~0 main_~x~0)) .cse4)) (.cse2 (<= main_~b~0 5)) (.cse3 (<= 1 main_~b~0)) (.cse0 (+ main_~y~0 1))) (or (and (<= 1 (mod .cse0 2)) .cse1 .cse2 .cse3 (<= 0 .cse0) (<= main_~y~0 1)) (and .cse1 (= main_~b~0 main_~y~0) (<= 1 main_~y~0) (= main_~a~0 main_~x~0) (<= main_~y~0 5)) (and (<= main_~y~0 2) (= (+ main_~z~0 (* 2 (* (div (* (- 1) main_~x~0) (- 2)) main_~y~0))) .cse4) .cse2 .cse3 (= (mod main_~x~0 2) 0) (< (div (* (- 1) (div (+ (* (- 1) (div (+ 2 (* (- 1) main_~b~0)) (- 2))) 1) (- 2))) (- 2)) .cse0))))) [2022-02-24 00:03:50,368 INFO L854 garLoopResultBuilder]: At program point L34-3(lines 34 45) the Hoare annotation is: (let ((.cse0 (* main_~b~0 main_~a~0))) (and (= main_~z~0 .cse0) (= (+ main_~z~0 (* main_~y~0 main_~x~0)) .cse0) (<= 1 main_~b~0))) [2022-02-24 00:03:50,368 INFO L854 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse4 (* main_~b~0 main_~a~0))) (let ((.cse1 (= (+ main_~z~0 (* main_~y~0 main_~x~0)) .cse4)) (.cse2 (<= main_~b~0 5)) (.cse3 (<= 1 main_~b~0)) (.cse0 (+ main_~y~0 1))) (or (and (<= 1 (mod .cse0 2)) .cse1 .cse2 .cse3 (<= 0 .cse0) (<= main_~y~0 1)) (and .cse1 (= main_~b~0 main_~y~0) (<= 1 main_~y~0) (= main_~a~0 main_~x~0) (<= main_~y~0 5)) (and (<= main_~y~0 2) (= (+ main_~z~0 (* 2 (* (div (* (- 1) main_~x~0) (- 2)) main_~y~0))) .cse4) .cse2 .cse3 (= (mod main_~x~0 2) 0) (< (div (* (- 1) (div (+ (* (- 1) (div (+ 2 (* (- 1) main_~b~0)) (- 2))) 1) (- 2))) (- 2)) .cse0))))) [2022-02-24 00:03:50,368 INFO L858 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2022-02-24 00:03:50,368 INFO L858 garLoopResultBuilder]: For program point L35-1(lines 34 45) no Hoare annotation was computed. [2022-02-24 00:03:50,369 INFO L858 garLoopResultBuilder]: For program point mainFINAL(lines 20 49) no Hoare annotation was computed. [2022-02-24 00:03:50,369 INFO L858 garLoopResultBuilder]: For program point L39(lines 39 42) no Hoare annotation was computed. [2022-02-24 00:03:50,369 INFO L858 garLoopResultBuilder]: For program point mainEXIT(lines 20 49) no Hoare annotation was computed. [2022-02-24 00:03:50,369 INFO L858 garLoopResultBuilder]: For program point L39-2(lines 39 42) no Hoare annotation was computed. [2022-02-24 00:03:50,369 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 12 18) the Hoare annotation is: true [2022-02-24 00:03:50,369 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 16) no Hoare annotation was computed. [2022-02-24 00:03:50,369 INFO L858 garLoopResultBuilder]: For program point L14(lines 14 15) no Hoare annotation was computed. [2022-02-24 00:03:50,369 INFO L858 garLoopResultBuilder]: For program point L13-2(lines 12 18) no Hoare annotation was computed. [2022-02-24 00:03:50,369 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2022-02-24 00:03:50,369 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 12 18) no Hoare annotation was computed. [2022-02-24 00:03:50,371 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1] [2022-02-24 00:03:50,372 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-24 00:03:50,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:03:50 BasicIcfg [2022-02-24 00:03:50,381 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-24 00:03:50,382 INFO L158 Benchmark]: Toolchain (without parser) took 83828.60ms. Allocated memory was 178.3MB in the beginning and 229.6MB in the end (delta: 51.4MB). Free memory was 120.8MB in the beginning and 109.5MB in the end (delta: 11.3MB). Peak memory consumption was 64.0MB. Max. memory is 8.0GB. [2022-02-24 00:03:50,382 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 178.3MB. Free memory is still 137.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 00:03:50,382 INFO L158 Benchmark]: CACSL2BoogieTranslator took 194.12ms. Allocated memory was 178.3MB in the beginning and 229.6MB in the end (delta: 51.4MB). Free memory was 152.7MB in the beginning and 200.9MB in the end (delta: -48.2MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. [2022-02-24 00:03:50,382 INFO L158 Benchmark]: Boogie Preprocessor took 34.52ms. Allocated memory is still 229.6MB. Free memory was 200.9MB in the beginning and 199.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-24 00:03:50,382 INFO L158 Benchmark]: RCFGBuilder took 253.16ms. Allocated memory is still 229.6MB. Free memory was 199.5MB in the beginning and 188.6MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-24 00:03:50,383 INFO L158 Benchmark]: IcfgTransformer took 27.21ms. Allocated memory is still 229.6MB. Free memory was 188.3MB in the beginning and 187.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-24 00:03:50,383 INFO L158 Benchmark]: TraceAbstraction took 83294.62ms. Allocated memory is still 229.6MB. Free memory was 186.5MB in the beginning and 109.5MB in the end (delta: 77.0MB). Peak memory consumption was 78.3MB. Max. memory is 8.0GB. [2022-02-24 00:03:50,384 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 178.3MB. Free memory is still 137.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 194.12ms. Allocated memory was 178.3MB in the beginning and 229.6MB in the end (delta: 51.4MB). Free memory was 152.7MB in the beginning and 200.9MB in the end (delta: -48.2MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.52ms. Allocated memory is still 229.6MB. Free memory was 200.9MB in the beginning and 199.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 253.16ms. Allocated memory is still 229.6MB. Free memory was 199.5MB in the beginning and 188.6MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 27.21ms. Allocated memory is still 229.6MB. Free memory was 188.3MB in the beginning and 187.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 83294.62ms. Allocated memory is still 229.6MB. Free memory was 186.5MB in the beginning and 109.5MB in the end (delta: 77.0MB). Peak memory consumption was 78.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 83.2s, OverallIterations: 9, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 31.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 17.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 5 mSolverCounterUnknown, 203 SdHoareTripleChecker+Valid, 19.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 190 mSDsluCounter, 1361 SdHoareTripleChecker+Invalid, 19.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 36 IncrementalHoareTripleChecker+Unchecked, 1142 mSDsCounter, 114 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 998 IncrementalHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 114 mSolverCounterUnsat, 219 mSDtfsCounter, 998 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 617 GetRequests, 464 SyntacticMatches, 16 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 33.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=7, InterpolantAutomatonStates: 92, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 22 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 31 PreInvPairs, 52 NumberOfFragments, 249 HoareAnnotationTreeSize, 31 FomulaSimplifications, 131 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 1481 FormulaSimplificationTreeSizeReductionInter, 17.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 31.4s InterpolantComputationTime, 363 NumberOfCodeBlocks, 363 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 576 ConstructedInterpolants, 3 QuantifiedInterpolants, 2941 SizeOfPredicates, 30 NumberOfNonLiveVariables, 948 ConjunctsInSsa, 148 ConjunctsInUnsatCore, 14 InterpolantComputations, 3 PerfectInterpolantSequences, 310/381 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((1 <= (y + 1) % 2 && z + y * x == b * a) && b <= 5) && 1 <= b) && 0 <= y + 1) && y <= 1) || ((((z + y * x == b * a && b == y) && 1 <= y) && a == x) && y <= 5)) || (((((y <= 2 && z + 2 * (-1 * x / -2 * y) == b * a) && b <= 5) && 1 <= b) && x % 2 == 0) && -1 * ((-1 * ((2 + -1 * b) / -2) + 1) / -2) / -2 < y + 1) RESULT: Ultimate proved your program to be correct! [2022-02-24 00:03:50,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...