/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/ps5-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 13:22:32,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 13:22:32,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 13:22:32,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 13:22:32,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 13:22:32,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 13:22:32,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 13:22:32,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 13:22:32,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 13:22:32,872 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 13:22:32,873 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 13:22:32,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 13:22:32,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 13:22:32,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 13:22:32,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 13:22:32,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 13:22:32,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 13:22:32,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 13:22:32,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 13:22:32,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 13:22:32,878 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 13:22:32,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 13:22:32,882 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 13:22:32,883 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 13:22:32,884 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 13:22:32,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-06 13:22:32,889 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-06 13:22:32,889 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-06 13:22:32,890 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-06 13:22:32,890 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-06 13:22:32,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-06 13:22:32,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-06 13:22:32,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-06 13:22:32,892 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-06 13:22:32,893 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-06 13:22:32,893 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-06 13:22:32,893 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-06 13:22:32,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-06 13:22:32,894 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-06 13:22:32,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 13:22:32,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 13:22:32,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 13:22:32,896 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 13:22:32,915 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 13:22:32,916 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 13:22:32,916 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 13:22:32,916 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 13:22:32,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 13:22:32,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 13:22:32,917 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 13:22:32,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 13:22:32,917 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 13:22:32,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 13:22:32,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 13:22:32,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 13:22:32,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 13:22:32,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 13:22:32,918 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 13:22:32,918 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 13:22:32,918 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 13:22:32,918 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 13:22:32,918 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 13:22:32,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 13:22:32,919 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 13:22:32,919 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 13:22:32,919 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 13:22:32,919 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 13:22:32,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 13:22:32,919 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 13:22:32,919 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 13:22:32,919 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 13:22:32,920 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 13:22:32,920 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 13:22:33,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 13:22:33,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 13:22:33,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 13:22:33,120 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 13:22:33,121 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 13:22:33,121 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound5.c [2022-04-06 13:22:33,157 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa582ed9b/f62a5c0b86c8479bb98cef20135aaa0d/FLAG6fd588b2a [2022-04-06 13:22:33,520 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 13:22:33,520 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound5.c [2022-04-06 13:22:33,525 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa582ed9b/f62a5c0b86c8479bb98cef20135aaa0d/FLAG6fd588b2a [2022-04-06 13:22:33,537 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa582ed9b/f62a5c0b86c8479bb98cef20135aaa0d [2022-04-06 13:22:33,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 13:22:33,541 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 13:22:33,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 13:22:33,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 13:22:33,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 13:22:33,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 01:22:33" (1/1) ... [2022-04-06 13:22:33,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f5116d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:22:33, skipping insertion in model container [2022-04-06 13:22:33,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 01:22:33" (1/1) ... [2022-04-06 13:22:33,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 13:22:33,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 13:22:33,698 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/ps5-ll_valuebound5.c[458,471] [2022-04-06 13:22:33,717 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 13:22:33,723 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 13:22:33,731 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/ps5-ll_valuebound5.c[458,471] [2022-04-06 13:22:33,744 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 13:22:33,752 INFO L208 MainTranslator]: Completed translation [2022-04-06 13:22:33,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:22:33 WrapperNode [2022-04-06 13:22:33,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 13:22:33,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 13:22:33,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 13:22:33,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 13:22:33,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:22:33" (1/1) ... [2022-04-06 13:22:33,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:22:33" (1/1) ... [2022-04-06 13:22:33,768 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:22:33" (1/1) ... [2022-04-06 13:22:33,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:22:33" (1/1) ... [2022-04-06 13:22:33,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:22:33" (1/1) ... [2022-04-06 13:22:33,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:22:33" (1/1) ... [2022-04-06 13:22:33,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:22:33" (1/1) ... [2022-04-06 13:22:33,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 13:22:33,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 13:22:33,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 13:22:33,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 13:22:33,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:22:33" (1/1) ... [2022-04-06 13:22:33,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 13:22:33,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:22:33,805 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) [2022-04-06 13:22:33,819 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 [2022-04-06 13:22:33,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 13:22:33,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 13:22:33,830 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 13:22:33,830 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 13:22:33,830 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 13:22:33,830 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 13:22:33,830 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 13:22:33,831 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 13:22:33,831 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 13:22:33,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 13:22:33,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-04-06 13:22:33,832 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 13:22:33,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 13:22:33,832 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 13:22:33,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 13:22:33,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 13:22:33,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 13:22:33,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 13:22:33,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 13:22:33,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 13:22:33,875 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 13:22:33,876 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 13:22:33,986 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 13:22:33,990 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 13:22:33,990 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 13:22:33,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 01:22:33 BoogieIcfgContainer [2022-04-06 13:22:33,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 13:22:33,991 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 13:22:33,991 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 13:22:34,007 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 13:22:34,009 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 01:22:33" (1/1) ... [2022-04-06 13:22:34,011 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 13:22:34,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 01:22:34 BasicIcfg [2022-04-06 13:22:34,020 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 13:22:34,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 13:22:34,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 13:22:34,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 13:22:34,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 01:22:33" (1/4) ... [2022-04-06 13:22:34,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@661275b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 01:22:34, skipping insertion in model container [2022-04-06 13:22:34,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:22:33" (2/4) ... [2022-04-06 13:22:34,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@661275b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 01:22:34, skipping insertion in model container [2022-04-06 13:22:34,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 01:22:33" (3/4) ... [2022-04-06 13:22:34,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@661275b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 01:22:34, skipping insertion in model container [2022-04-06 13:22:34,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 01:22:34" (4/4) ... [2022-04-06 13:22:34,042 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_valuebound5.cqvasr [2022-04-06 13:22:34,045 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 13:22:34,045 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 13:22:34,070 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 13:22:34,077 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 13:22:34,078 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 13:22:34,100 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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) [2022-04-06 13:22:34,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 13:22:34,103 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:22:34,104 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:22:34,104 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:22:34,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:22:34,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1187991702, now seen corresponding path program 1 times [2022-04-06 13:22:34,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:22:34,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957350309] [2022-04-06 13:22:34,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:22:34,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:22:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:22:34,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:22:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:22:34,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 13:22:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:22:34,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 13:22:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:22:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 13:22:34,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:22:34,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957350309] [2022-04-06 13:22:34,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957350309] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:22:34,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:22:34,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 13:22:34,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031866720] [2022-04-06 13:22:34,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:22:34,286 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 13:22:34,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:22:34,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 13:22:34,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 13:22:34,304 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 13:22:34,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:22:34,359 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2022-04-06 13:22:34,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 13:22:34,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-06 13:22:34,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:22:34,365 INFO L225 Difference]: With dead ends: 51 [2022-04-06 13:22:34,366 INFO L226 Difference]: Without dead ends: 24 [2022-04-06 13:22:34,367 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 13:22:34,369 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:22:34,370 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:22:34,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-06 13:22:34,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-04-06 13:22:34,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 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) [2022-04-06 13:22:34,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-04-06 13:22:34,392 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2022-04-06 13:22:34,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:22:34,392 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-04-06 13:22:34,392 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 13:22:34,392 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-04-06 13:22:34,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 13:22:34,393 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:22:34,393 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:22:34,394 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 13:22:34,394 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:22:34,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:22:34,394 INFO L85 PathProgramCache]: Analyzing trace with hash 793962506, now seen corresponding path program 1 times [2022-04-06 13:22:34,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:22:34,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916294847] [2022-04-06 13:22:34,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:22:34,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:22:34,411 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:22:34,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [314255324] [2022-04-06 13:22:34,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:22:34,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:22:34,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:22:34,414 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) [2022-04-06 13:22:34,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 13:22:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:22:34,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 13:22:34,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:22:34,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 13:22:34,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 13:22:34,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:22:34,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916294847] [2022-04-06 13:22:34,548 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:22:34,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314255324] [2022-04-06 13:22:34,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314255324] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:22:34,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:22:34,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 13:22:34,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643672685] [2022-04-06 13:22:34,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:22:34,550 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 13:22:34,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:22:34,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 13:22:34,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:22:34,551 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 13:22:34,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:22:34,581 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-04-06 13:22:34,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 13:22:34,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-04-06 13:22:34,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:22:34,582 INFO L225 Difference]: With dead ends: 35 [2022-04-06 13:22:34,582 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 13:22:34,583 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 13:22:34,585 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:22:34,588 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 85 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:22:34,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 13:22:34,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-04-06 13:22:34,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 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) [2022-04-06 13:22:34,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-04-06 13:22:34,598 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2022-04-06 13:22:34,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:22:34,599 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-04-06 13:22:34,599 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 13:22:34,599 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-04-06 13:22:34,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 13:22:34,600 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:22:34,600 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:22:34,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 13:22:34,816 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:22:34,816 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:22:34,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:22:34,817 INFO L85 PathProgramCache]: Analyzing trace with hash -503871754, now seen corresponding path program 1 times [2022-04-06 13:22:34,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:22:34,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812922409] [2022-04-06 13:22:34,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:22:34,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:22:34,842 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:22:34,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142869861] [2022-04-06 13:22:34,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:22:34,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:22:34,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:22:34,850 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) [2022-04-06 13:22:34,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 13:22:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:22:34,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 13:22:34,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:22:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 13:22:35,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:22:38,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 13:22:38,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:22:38,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812922409] [2022-04-06 13:22:38,626 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:22:38,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142869861] [2022-04-06 13:22:38,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142869861] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 13:22:38,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 13:22:38,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-06 13:22:38,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419884662] [2022-04-06 13:22:38,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:22:38,627 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 13:22:38,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:22:38,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 13:22:38,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=28, Unknown=1, NotChecked=0, Total=42 [2022-04-06 13:22:38,628 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 13:22:38,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:22:38,670 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-04-06 13:22:38,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 13:22:38,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-04-06 13:22:38,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:22:38,672 INFO L225 Difference]: With dead ends: 37 [2022-04-06 13:22:38,672 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 13:22:38,673 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=17, Invalid=38, Unknown=1, NotChecked=0, Total=56 [2022-04-06 13:22:38,675 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:22:38,676 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 75 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:22:38,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 13:22:38,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-06 13:22:38,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 13:22:38,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-04-06 13:22:38,686 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2022-04-06 13:22:38,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:22:38,686 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-04-06 13:22:38,686 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 13:22:38,686 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-04-06 13:22:38,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 13:22:38,691 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:22:38,691 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:22:38,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 13:22:38,892 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 13:22:38,892 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:22:38,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:22:38,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1285656823, now seen corresponding path program 1 times [2022-04-06 13:22:38,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:22:38,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657604774] [2022-04-06 13:22:38,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:22:38,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:22:38,903 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:22:38,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1842865688] [2022-04-06 13:22:38,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:22:38,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:22:38,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:22:38,904 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) [2022-04-06 13:22:38,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 13:22:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:22:38,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 13:22:38,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:22:39,080 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 13:22:39,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:22:39,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:22:39,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657604774] [2022-04-06 13:22:39,243 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:22:39,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842865688] [2022-04-06 13:22:39,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842865688] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 13:22:39,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 13:22:39,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-06 13:22:39,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087688169] [2022-04-06 13:22:39,243 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 13:22:39,244 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 13:22:39,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:22:39,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 13:22:39,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 13:22:39,244 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 13:22:39,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:22:39,311 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-04-06 13:22:39,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 13:22:39,312 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2022-04-06 13:22:39,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:22:39,312 INFO L225 Difference]: With dead ends: 42 [2022-04-06 13:22:39,312 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 13:22:39,313 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-06 13:22:39,313 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:22:39,314 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 135 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:22:39,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 13:22:39,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-04-06 13:22:39,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 13:22:39,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-04-06 13:22:39,319 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 40 [2022-04-06 13:22:39,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:22:39,319 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-04-06 13:22:39,319 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 13:22:39,319 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-04-06 13:22:39,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 13:22:39,320 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:22:39,320 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:22:39,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 13:22:39,535 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:22:39,535 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:22:39,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:22:39,536 INFO L85 PathProgramCache]: Analyzing trace with hash -542323485, now seen corresponding path program 2 times [2022-04-06 13:22:39,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:22:39,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315668537] [2022-04-06 13:22:39,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:22:39,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:22:39,546 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:22:39,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026027312] [2022-04-06 13:22:39,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 13:22:39,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:22:39,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:22:39,549 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) [2022-04-06 13:22:39,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 13:22:39,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 13:22:39,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 13:22:39,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 13:22:39,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:22:39,792 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 13:22:39,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:22:39,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:22:39,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315668537] [2022-04-06 13:22:39,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:22:39,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026027312] [2022-04-06 13:22:39,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026027312] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 13:22:39,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 13:22:39,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-04-06 13:22:39,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423072193] [2022-04-06 13:22:39,942 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 13:22:39,943 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 13:22:39,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:22:39,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 13:22:39,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-06 13:22:39,943 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 13:22:40,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:22:40,011 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-04-06 13:22:40,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 13:22:40,011 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2022-04-06 13:22:40,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:22:40,012 INFO L225 Difference]: With dead ends: 45 [2022-04-06 13:22:40,012 INFO L226 Difference]: Without dead ends: 39 [2022-04-06 13:22:40,012 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-04-06 13:22:40,013 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:22:40,013 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 164 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:22:40,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-06 13:22:40,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-04-06 13:22:40,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 13:22:40,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-04-06 13:22:40,018 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 47 [2022-04-06 13:22:40,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:22:40,019 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-04-06 13:22:40,019 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 13:22:40,019 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-04-06 13:22:40,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 13:22:40,020 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:22:40,020 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:22:40,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-06 13:22:40,224 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:22:40,224 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:22:40,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:22:40,224 INFO L85 PathProgramCache]: Analyzing trace with hash -2094100617, now seen corresponding path program 3 times [2022-04-06 13:22:40,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:22:40,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483414799] [2022-04-06 13:22:40,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:22:40,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:22:40,232 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:22:40,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292211723] [2022-04-06 13:22:40,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 13:22:40,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:22:40,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:22:40,233 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) [2022-04-06 13:22:40,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 13:22:40,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-06 13:22:40,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 13:22:40,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 13:22:40,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:22:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 13:22:40,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:22:40,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:22:40,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483414799] [2022-04-06 13:22:40,713 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:22:40,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292211723] [2022-04-06 13:22:40,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292211723] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 13:22:40,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 13:22:40,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-04-06 13:22:40,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007905967] [2022-04-06 13:22:40,714 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 13:22:40,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 13:22:40,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:22:40,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 13:22:40,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-04-06 13:22:40,715 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-04-06 13:22:40,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:22:40,805 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-04-06 13:22:40,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 13:22:40,805 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2022-04-06 13:22:40,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:22:40,806 INFO L225 Difference]: With dead ends: 48 [2022-04-06 13:22:40,806 INFO L226 Difference]: Without dead ends: 42 [2022-04-06 13:22:40,806 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-04-06 13:22:40,807 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 2 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:22:40,807 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 199 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:22:40,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-06 13:22:40,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-04-06 13:22:40,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 13:22:40,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-04-06 13:22:40,812 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 54 [2022-04-06 13:22:40,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:22:40,812 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-04-06 13:22:40,813 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-04-06 13:22:40,813 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-04-06 13:22:40,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 13:22:40,813 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:22:40,813 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:22:40,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 13:22:41,018 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:22:41,018 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:22:41,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:22:41,019 INFO L85 PathProgramCache]: Analyzing trace with hash -826507677, now seen corresponding path program 4 times [2022-04-06 13:22:41,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:22:41,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456655889] [2022-04-06 13:22:41,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:22:41,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:22:41,026 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:22:41,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516111860] [2022-04-06 13:22:41,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 13:22:41,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:22:41,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:22:41,027 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) [2022-04-06 13:22:41,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 13:22:41,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 13:22:41,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 13:22:41,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 13:22:41,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:22:41,217 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 13:22:41,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:22:41,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:22:41,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456655889] [2022-04-06 13:22:41,337 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:22:41,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516111860] [2022-04-06 13:22:41,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516111860] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 13:22:41,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 13:22:41,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-06 13:22:41,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419484375] [2022-04-06 13:22:41,338 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 13:22:41,338 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 13:22:41,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:22:41,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 13:22:41,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-06 13:22:41,339 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-04-06 13:22:41,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:22:41,472 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2022-04-06 13:22:41,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 13:22:41,472 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2022-04-06 13:22:41,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:22:41,473 INFO L225 Difference]: With dead ends: 51 [2022-04-06 13:22:41,473 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 13:22:41,473 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-04-06 13:22:41,473 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:22:41,474 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 234 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:22:41,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 13:22:41,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-04-06 13:22:41,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 13:22:41,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-04-06 13:22:41,478 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 61 [2022-04-06 13:22:41,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:22:41,479 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-04-06 13:22:41,479 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-04-06 13:22:41,479 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-04-06 13:22:41,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 13:22:41,479 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:22:41,479 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:22:41,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 13:22:41,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:22:41,688 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:22:41,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:22:41,688 INFO L85 PathProgramCache]: Analyzing trace with hash -170119689, now seen corresponding path program 5 times [2022-04-06 13:22:41,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:22:41,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813216195] [2022-04-06 13:22:41,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:22:41,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:22:41,694 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:22:41,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [159535227] [2022-04-06 13:22:41,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 13:22:41,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:22:41,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:22:41,695 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) [2022-04-06 13:22:41,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 13:22:56,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-04-06 13:22:56,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 13:22:56,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 13:22:56,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:22:56,528 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 13:22:56,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:22:56,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:22:56,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813216195] [2022-04-06 13:22:56,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:22:56,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159535227] [2022-04-06 13:22:56,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159535227] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 13:22:56,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 13:22:56,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-04-06 13:22:56,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145862264] [2022-04-06 13:22:56,649 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 13:22:56,649 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 13:22:56,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:22:56,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 13:22:56,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-04-06 13:22:56,650 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-04-06 13:22:56,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:22:56,773 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-04-06 13:22:56,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 13:22:56,774 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 68 [2022-04-06 13:22:56,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:22:56,774 INFO L225 Difference]: With dead ends: 54 [2022-04-06 13:22:56,774 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 13:22:56,775 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-04-06 13:22:56,775 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 2 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:22:56,775 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 271 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:22:56,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 13:22:56,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-04-06 13:22:56,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 13 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 13:22:56,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-04-06 13:22:56,780 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 68 [2022-04-06 13:22:56,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:22:56,781 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-04-06 13:22:56,781 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-04-06 13:22:56,781 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-04-06 13:22:56,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 13:22:56,781 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:22:56,781 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:22:56,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 13:22:56,993 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:22:56,993 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:22:56,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:22:56,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1505202147, now seen corresponding path program 6 times [2022-04-06 13:22:56,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:22:56,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954859077] [2022-04-06 13:22:56,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:22:56,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:22:57,000 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:22:57,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015634437] [2022-04-06 13:22:57,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 13:22:57,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:22:57,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:22:57,002 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) [2022-04-06 13:22:57,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 13:22:58,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 13:22:58,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 13:22:58,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 13:22:58,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:22:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 123 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 13:22:58,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:22:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 79 proven. 3 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-04-06 13:22:59,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:22:59,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954859077] [2022-04-06 13:22:59,187 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:22:59,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015634437] [2022-04-06 13:22:59,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015634437] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 13:22:59,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 13:22:59,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-04-06 13:22:59,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777140097] [2022-04-06 13:22:59,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 13:22:59,188 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 13:22:59,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:22:59,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 13:22:59,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2022-04-06 13:22:59,189 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 16 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 16 states have call predecessors, (21), 16 states have call successors, (21) [2022-04-06 13:22:59,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:22:59,273 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2022-04-06 13:22:59,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 13:22:59,273 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 16 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 16 states have call predecessors, (21), 16 states have call successors, (21) Word has length 75 [2022-04-06 13:22:59,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:22:59,273 INFO L225 Difference]: With dead ends: 54 [2022-04-06 13:22:59,273 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 13:22:59,274 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-04-06 13:22:59,275 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:22:59,275 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 222 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:22:59,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 13:22:59,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 13:22:59,275 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) [2022-04-06 13:22:59,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 13:22:59,275 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2022-04-06 13:22:59,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:22:59,276 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 13:22:59,276 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 16 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 16 states have call predecessors, (21), 16 states have call successors, (21) [2022-04-06 13:22:59,276 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 13:22:59,276 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 13:22:59,277 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 13:22:59,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 13:22:59,485 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-06 13:22:59,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 13:23:02,072 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-06 13:23:02,072 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-04-06 13:23:02,072 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-04-06 13:23:02,072 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 13:23:02,072 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 13:23:02,072 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-04-06 13:23:02,072 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-04-06 13:23:02,072 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 6 8) the Hoare annotation is: true [2022-04-06 13:23:02,072 INFO L882 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2022-04-06 13:23:02,072 INFO L882 garLoopResultBuilder]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2022-04-06 13:23:02,072 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2022-04-06 13:23:02,072 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 17 42) the Hoare annotation is: true [2022-04-06 13:23:02,072 INFO L885 garLoopResultBuilder]: At program point L21(line 21) the Hoare annotation is: true [2022-04-06 13:23:02,073 INFO L878 garLoopResultBuilder]: At program point L21-1(line 21) the Hoare annotation is: (and (<= main_~k~0 5) (<= 0 main_~k~0)) [2022-04-06 13:23:02,073 INFO L882 garLoopResultBuilder]: For program point L22(line 22) no Hoare annotation was computed. [2022-04-06 13:23:02,073 INFO L878 garLoopResultBuilder]: At program point L28-2(lines 28 37) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 5)) (.cse1 (= (+ main_~y~0 (* 30 main_~x~0)) (+ (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) 15) (* 6 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0)) (* (* main_~y~0 main_~y~0 main_~y~0) 10))))) (or (and (<= main_~c~0 5) .cse0 .cse1 (= 5 main_~y~0) (<= 5 main_~c~0) (< 4 main_~k~0)) (and .cse0 (<= 0 main_~k~0) .cse1 (= main_~c~0 0) (= main_~y~0 0)) (and (= main_~y~0 2) .cse0 (< 1 main_~k~0) (= main_~c~0 2) .cse1) (and .cse0 (= main_~y~0 1) .cse1 (< 0 main_~k~0) (= main_~c~0 1)) (and .cse0 (= main_~y~0 4) (= main_~c~0 4) (< 3 main_~k~0) .cse1) (and .cse0 (= main_~y~0 3) .cse1 (< 2 main_~k~0) (= main_~c~0 3)))) [2022-04-06 13:23:02,073 INFO L878 garLoopResultBuilder]: At program point L28-3(lines 28 37) the Hoare annotation is: (let ((.cse1 (+ (- 1) main_~y~0)) (.cse0 (= (+ main_~y~0 (* 30 main_~x~0)) (+ (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) 15) (* 6 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0)) (* (* main_~y~0 main_~y~0 main_~y~0) 10))))) (or (and (= main_~x~0 0) (= main_~y~0 0)) (and (<= main_~c~0 3) (= main_~y~0 3) .cse0 (<= main_~k~0 3) (< 2 main_~k~0)) (and (= main_~y~0 2) (< 1 main_~k~0) (<= main_~k~0 2) (<= main_~c~0 2) .cse0) (and (= .cse1 0) (<= main_~k~0 1) .cse0 (< 0 main_~k~0) (<= main_~c~0 1)) (and (= 3 .cse1) (< 3 main_~k~0) .cse0 (<= main_~k~0 4) (<= main_~c~0 4)) (and (<= main_~c~0 5) (<= main_~k~0 5) .cse0 (= 5 main_~y~0) (< 4 main_~k~0)))) [2022-04-06 13:23:02,073 INFO L878 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 5)) (.cse1 (= (+ main_~y~0 (* 30 main_~x~0)) (+ (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) 15) (* 6 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0)) (* (* main_~y~0 main_~y~0 main_~y~0) 10))))) (or (and (<= main_~c~0 5) .cse0 .cse1 (= 5 main_~y~0) (<= 5 main_~c~0) (< 4 main_~k~0)) (and .cse0 (<= 0 main_~k~0) .cse1 (= main_~c~0 0) (= main_~y~0 0)) (and (= main_~y~0 2) .cse0 (< 1 main_~k~0) (= main_~c~0 2) .cse1) (and .cse0 (= main_~y~0 1) .cse1 (< 0 main_~k~0) (= main_~c~0 1)) (and .cse0 (= main_~y~0 4) (= main_~c~0 4) (< 3 main_~k~0) .cse1) (and .cse0 (= main_~y~0 3) .cse1 (< 2 main_~k~0) (= main_~c~0 3)))) [2022-04-06 13:23:02,073 INFO L878 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (let ((.cse1 (+ (- 1) main_~y~0)) (.cse0 (= (+ main_~y~0 (* 30 main_~x~0)) (+ (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) 15) (* 6 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0)) (* (* main_~y~0 main_~y~0 main_~y~0) 10))))) (or (and (= main_~x~0 0) (= main_~y~0 0)) (and (<= main_~c~0 3) (= main_~y~0 3) .cse0 (<= main_~k~0 3) (< 2 main_~k~0)) (and (= main_~y~0 2) (< 1 main_~k~0) (<= main_~k~0 2) (<= main_~c~0 2) .cse0) (and (= .cse1 0) (<= main_~k~0 1) .cse0 (< 0 main_~k~0) (<= main_~c~0 1)) (and (= 3 .cse1) (< 3 main_~k~0) .cse0 (<= main_~k~0 4) (<= main_~c~0 4)) (and (<= main_~c~0 5) (<= main_~k~0 5) .cse0 (= 5 main_~y~0) (< 4 main_~k~0)))) [2022-04-06 13:23:02,073 INFO L882 garLoopResultBuilder]: For program point L29-1(lines 28 37) no Hoare annotation was computed. [2022-04-06 13:23:02,073 INFO L882 garLoopResultBuilder]: For program point L40(line 40) no Hoare annotation was computed. [2022-04-06 13:23:02,073 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 17 42) no Hoare annotation was computed. [2022-04-06 13:23:02,073 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 17 42) no Hoare annotation was computed. [2022-04-06 13:23:02,073 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2022-04-06 13:23:02,073 INFO L882 garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed. [2022-04-06 13:23:02,073 INFO L882 garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed. [2022-04-06 13:23:02,073 INFO L882 garLoopResultBuilder]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2022-04-06 13:23:02,073 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2022-04-06 13:23:02,074 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2022-04-06 13:23:02,075 INFO L719 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1] [2022-04-06 13:23:02,076 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 13:23:02,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 01:23:02 BasicIcfg [2022-04-06 13:23:02,089 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 13:23:02,090 INFO L158 Benchmark]: Toolchain (without parser) took 28549.15ms. Allocated memory was 198.2MB in the beginning and 260.0MB in the end (delta: 61.9MB). Free memory was 146.5MB in the beginning and 172.9MB in the end (delta: -26.3MB). Peak memory consumption was 35.5MB. Max. memory is 8.0GB. [2022-04-06 13:23:02,090 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 198.2MB. Free memory was 162.9MB in the beginning and 162.7MB in the end (delta: 151.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 13:23:02,090 INFO L158 Benchmark]: CACSL2BoogieTranslator took 212.56ms. Allocated memory is still 198.2MB. Free memory was 146.4MB in the beginning and 174.5MB in the end (delta: -28.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 13:23:02,090 INFO L158 Benchmark]: Boogie Preprocessor took 26.62ms. Allocated memory is still 198.2MB. Free memory was 174.5MB in the beginning and 173.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 13:23:02,091 INFO L158 Benchmark]: RCFGBuilder took 208.24ms. Allocated memory is still 198.2MB. Free memory was 173.1MB in the beginning and 163.4MB in the end (delta: 9.7MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-04-06 13:23:02,091 INFO L158 Benchmark]: IcfgTransformer took 29.07ms. Allocated memory is still 198.2MB. Free memory was 163.4MB in the beginning and 162.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 13:23:02,091 INFO L158 Benchmark]: TraceAbstraction took 28068.03ms. Allocated memory was 198.2MB in the beginning and 260.0MB in the end (delta: 61.9MB). Free memory was 161.5MB in the beginning and 172.9MB in the end (delta: -11.3MB). Peak memory consumption was 51.4MB. Max. memory is 8.0GB. [2022-04-06 13:23:02,092 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 198.2MB. Free memory was 162.9MB in the beginning and 162.7MB in the end (delta: 151.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 212.56ms. Allocated memory is still 198.2MB. Free memory was 146.4MB in the beginning and 174.5MB in the end (delta: -28.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.62ms. Allocated memory is still 198.2MB. Free memory was 174.5MB in the beginning and 173.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 208.24ms. Allocated memory is still 198.2MB. Free memory was 173.1MB in the beginning and 163.4MB in the end (delta: 9.7MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 29.07ms. Allocated memory is still 198.2MB. Free memory was 163.4MB in the beginning and 162.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 28068.03ms. Allocated memory was 198.2MB in the beginning and 260.0MB in the end (delta: 61.9MB). Free memory was 161.5MB in the beginning and 172.9MB in the end (delta: -11.3MB). Peak memory consumption was 51.4MB. 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: 12]: 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, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 28.0s, OverallIterations: 9, TraceHistogramMax: 9, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 50 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 42 mSDsluCounter, 1415 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1130 mSDsCounter, 23 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 799 IncrementalHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 23 mSolverCounterUnsat, 285 mSDtfsCounter, 799 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 612 GetRequests, 515 SyntacticMatches, 7 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 4.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=8, InterpolantAutomatonStates: 70, 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 37 PreInvPairs, 62 NumberOfFragments, 954 HoareAnnotationTreeSize, 37 FomulaSimplifications, 162 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 6 FormulaSimplificationTreeSizeReductionInter, 2.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 16.7s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 418 NumberOfCodeBlocks, 409 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 511 ConstructedInterpolants, 0 QuantifiedInterpolants, 1590 SizeOfPredicates, 13 NumberOfNonLiveVariables, 1049 ConjunctsInSsa, 131 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 696/809 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: 28]: Loop Invariant Derived loop invariant: (((((((((c <= 5 && k <= 5) && y + 30 * x == y * y * y * y * 15 + 6 * (y * y * y * y * y) + y * y * y * 10) && 5 == y) && 5 <= c) && 4 < k) || ((((k <= 5 && 0 <= k) && y + 30 * x == y * y * y * y * 15 + 6 * (y * y * y * y * y) + y * y * y * 10) && c == 0) && y == 0)) || ((((y == 2 && k <= 5) && 1 < k) && c == 2) && y + 30 * x == y * y * y * y * 15 + 6 * (y * y * y * y * y) + y * y * y * 10)) || ((((k <= 5 && y == 1) && y + 30 * x == y * y * y * y * 15 + 6 * (y * y * y * y * y) + y * y * y * 10) && 0 < k) && c == 1)) || ((((k <= 5 && y == 4) && c == 4) && 3 < k) && y + 30 * x == y * y * y * y * 15 + 6 * (y * y * y * y * y) + y * y * y * 10)) || ((((k <= 5 && y == 3) && y + 30 * x == y * y * y * y * 15 + 6 * (y * y * y * y * y) + y * y * y * 10) && 2 < k) && c == 3) RESULT: Ultimate proved your program to be correct! [2022-04-06 13:23:02,127 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...