/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/hard-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 20:22:04,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 20:22:04,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 20:22:04,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 20:22:04,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 20:22:04,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 20:22:04,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 20:22:04,776 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 20:22:04,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 20:22:04,778 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 20:22:04,778 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 20:22:04,779 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 20:22:04,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 20:22:04,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 20:22:04,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 20:22:04,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 20:22:04,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 20:22:04,789 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 20:22:04,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 20:22:04,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 20:22:04,793 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 20:22:04,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 20:22:04,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 20:22:04,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 20:22:04,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 20:22:04,804 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-17 20:22:04,804 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-17 20:22:04,804 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-17 20:22:04,805 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-17 20:22:04,805 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-17 20:22:04,806 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-17 20:22:04,806 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-17 20:22:04,807 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-17 20:22:04,808 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-17 20:22:04,808 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-17 20:22:04,809 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-17 20:22:04,809 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-17 20:22:04,810 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-17 20:22:04,810 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-17 20:22:04,810 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 20:22:04,811 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 20:22:04,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 20:22:04,819 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 20:22:04,853 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 20:22:04,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 20:22:04,854 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 20:22:04,854 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 20:22:04,855 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 20:22:04,855 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 20:22:04,855 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 20:22:04,856 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 20:22:04,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 20:22:04,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 20:22:04,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 20:22:04,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 20:22:04,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 20:22:04,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 20:22:04,857 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 20:22:04,857 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 20:22:04,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 20:22:04,857 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 20:22:04,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 20:22:04,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 20:22:04,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 20:22:04,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 20:22:04,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 20:22:04,859 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 20:22:04,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 20:22:04,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 20:22:04,859 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 20:22:04,859 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 20:22:04,860 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 20:22:04,860 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 20:22:05,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 20:22:05,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 20:22:05,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 20:22:05,081 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 20:22:05,082 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 20:22:05,083 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/hard-ll.c [2022-03-17 20:22:05,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/280782d86/b1c93fc258144e9fb03618c41b62814a/FLAG9b3c23dc8 [2022-03-17 20:22:05,533 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 20:22:05,534 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard-ll.c [2022-03-17 20:22:05,542 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/280782d86/b1c93fc258144e9fb03618c41b62814a/FLAG9b3c23dc8 [2022-03-17 20:22:05,553 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/280782d86/b1c93fc258144e9fb03618c41b62814a [2022-03-17 20:22:05,555 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 20:22:05,556 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 20:22:05,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 20:22:05,557 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 20:22:05,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 20:22:05,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 08:22:05" (1/1) ... [2022-03-17 20:22:05,561 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75057d38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:22:05, skipping insertion in model container [2022-03-17 20:22:05,561 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 08:22:05" (1/1) ... [2022-03-17 20:22:05,567 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 20:22:05,577 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 20:22:05,727 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/hard-ll.c[538,551] [2022-03-17 20:22:05,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 20:22:05,751 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 20:22:05,759 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/hard-ll.c[538,551] [2022-03-17 20:22:05,764 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 20:22:05,773 INFO L208 MainTranslator]: Completed translation [2022-03-17 20:22:05,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:22:05 WrapperNode [2022-03-17 20:22:05,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 20:22:05,775 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 20:22:05,775 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 20:22:05,775 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 20:22:05,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:22:05" (1/1) ... [2022-03-17 20:22:05,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:22:05" (1/1) ... [2022-03-17 20:22:05,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:22:05" (1/1) ... [2022-03-17 20:22:05,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:22:05" (1/1) ... [2022-03-17 20:22:05,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:22:05" (1/1) ... [2022-03-17 20:22:05,799 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:22:05" (1/1) ... [2022-03-17 20:22:05,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:22:05" (1/1) ... [2022-03-17 20:22:05,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 20:22:05,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 20:22:05,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 20:22:05,803 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 20:22:05,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:22:05" (1/1) ... [2022-03-17 20:22:05,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 20:22:05,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:22:05,845 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 20:22:05,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 20:22:05,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 20:22:05,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 20:22:05,883 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 20:22:05,883 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 20:22:05,884 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 20:22:05,884 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 20:22:05,884 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 20:22:05,885 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 20:22:05,885 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 20:22:05,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 20:22:05,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-17 20:22:05,886 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 20:22:05,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 20:22:05,886 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 20:22:05,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 20:22:05,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 20:22:05,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 20:22:05,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 20:22:05,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 20:22:05,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 20:22:05,947 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 20:22:05,949 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 20:22:06,065 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 20:22:06,070 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 20:22:06,070 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 20:22:06,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:22:06 BoogieIcfgContainer [2022-03-17 20:22:06,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 20:22:06,072 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 20:22:06,072 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 20:22:06,073 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 20:22:06,075 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:22:06" (1/1) ... [2022-03-17 20:22:06,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 08:22:06 BasicIcfg [2022-03-17 20:22:06,091 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 20:22:06,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 20:22:06,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 20:22:06,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 20:22:06,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 08:22:05" (1/4) ... [2022-03-17 20:22:06,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392bb989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 08:22:06, skipping insertion in model container [2022-03-17 20:22:06,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:22:05" (2/4) ... [2022-03-17 20:22:06,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392bb989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 08:22:06, skipping insertion in model container [2022-03-17 20:22:06,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:22:06" (3/4) ... [2022-03-17 20:22:06,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392bb989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 08:22:06, skipping insertion in model container [2022-03-17 20:22:06,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 08:22:06" (4/4) ... [2022-03-17 20:22:06,097 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll.cqvasr [2022-03-17 20:22:06,101 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 20:22:06,101 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 20:22:06,164 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 20:22:06,170 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 20:22:06,171 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 20:22:06,194 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 20:22:06,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 20:22:06,198 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:22:06,199 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:22:06,199 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:22:06,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:22:06,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1625753047, now seen corresponding path program 1 times [2022-03-17 20:22:06,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:22:06,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651912344] [2022-03-17 20:22:06,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:22:06,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:22:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:22:06,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:22:06,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:22:06,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:22:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:22:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:22:06,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:22:06,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651912344] [2022-03-17 20:22:06,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651912344] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:22:06,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:22:06,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 20:22:06,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900296149] [2022-03-17 20:22:06,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:22:06,442 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 20:22:06,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:22:06,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 20:22:06,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 20:22:06,472 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:22:06,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:22:06,573 INFO L93 Difference]: Finished difference Result 61 states and 95 transitions. [2022-03-17 20:22:06,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 20:22:06,575 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-17 20:22:06,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:22:06,587 INFO L225 Difference]: With dead ends: 61 [2022-03-17 20:22:06,587 INFO L226 Difference]: Without dead ends: 30 [2022-03-17 20:22:06,590 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 20:22:06,593 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:22:06,593 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:22:06,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-17 20:22:06,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-17 20:22:06,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 20:22:06,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-03-17 20:22:06,643 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2022-03-17 20:22:06,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:22:06,643 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-03-17 20:22:06,643 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:22:06,644 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-03-17 20:22:06,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 20:22:06,644 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:22:06,644 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:22:06,645 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 20:22:06,645 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:22:06,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:22:06,646 INFO L85 PathProgramCache]: Analyzing trace with hash 861759786, now seen corresponding path program 1 times [2022-03-17 20:22:06,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:22:06,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20749657] [2022-03-17 20:22:06,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:22:06,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:22:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:22:06,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:22:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:22:06,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:22:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:22:06,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:22:06,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:22:06,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20749657] [2022-03-17 20:22:06,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20749657] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:22:06,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:22:06,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 20:22:06,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154232279] [2022-03-17 20:22:06,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:22:06,753 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 20:22:06,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:22:06,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 20:22:06,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:22:06,755 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:22:06,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:22:06,932 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-03-17 20:22:06,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 20:22:06,933 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-17 20:22:06,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:22:06,935 INFO L225 Difference]: With dead ends: 43 [2022-03-17 20:22:06,936 INFO L226 Difference]: Without dead ends: 41 [2022-03-17 20:22:06,941 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 20:22:06,942 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:22:06,942 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 45 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:22:06,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-17 20:22:06,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-03-17 20:22:06,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 20:22:06,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-03-17 20:22:06,958 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2022-03-17 20:22:06,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:22:06,958 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-03-17 20:22:06,958 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:22:06,959 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-03-17 20:22:06,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-17 20:22:06,959 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:22:06,959 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:22:06,960 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 20:22:06,960 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:22:06,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:22:06,960 INFO L85 PathProgramCache]: Analyzing trace with hash 325569287, now seen corresponding path program 1 times [2022-03-17 20:22:06,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:22:06,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771934955] [2022-03-17 20:22:06,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:22:06,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:22:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:22:07,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:22:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:22:07,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:22:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:22:07,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-17 20:22:07,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:22:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:22:07,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:22:07,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771934955] [2022-03-17 20:22:07,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771934955] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:22:07,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:22:07,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 20:22:07,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711709495] [2022-03-17 20:22:07,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:22:07,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 20:22:07,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:22:07,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 20:22:07,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:22:07,042 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 20:22:07,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:22:07,205 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-03-17 20:22:07,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 20:22:07,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-17 20:22:07,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:22:07,209 INFO L225 Difference]: With dead ends: 47 [2022-03-17 20:22:07,209 INFO L226 Difference]: Without dead ends: 45 [2022-03-17 20:22:07,210 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 20:22:07,215 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:22:07,216 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 45 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:22:07,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-17 20:22:07,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2022-03-17 20:22:07,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 20:22:07,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-03-17 20:22:07,233 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2022-03-17 20:22:07,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:22:07,234 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-03-17 20:22:07,234 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 20:22:07,234 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-03-17 20:22:07,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-17 20:22:07,234 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:22:07,235 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:22:07,235 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-17 20:22:07,235 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:22:07,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:22:07,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1461652409, now seen corresponding path program 1 times [2022-03-17 20:22:07,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:22:07,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084162250] [2022-03-17 20:22:07,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:22:07,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:22:07,252 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:22:07,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595472973] [2022-03-17 20:22:07,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:22:07,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:22:07,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:22:07,254 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:22:07,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 20:22:07,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:22:07,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 20:22:07,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:22:07,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 20:22:07,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:22:07,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:22:07,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084162250] [2022-03-17 20:22:07,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:22:07,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595472973] [2022-03-17 20:22:07,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595472973] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:22:07,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:22:07,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 20:22:07,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294809976] [2022-03-17 20:22:07,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:22:07,440 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 20:22:07,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:22:07,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 20:22:07,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:22:07,441 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-03-17 20:22:07,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:22:07,523 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2022-03-17 20:22:07,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 20:22:07,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 27 [2022-03-17 20:22:07,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:22:07,526 INFO L225 Difference]: With dead ends: 66 [2022-03-17 20:22:07,526 INFO L226 Difference]: Without dead ends: 52 [2022-03-17 20:22:07,526 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:22:07,534 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:22:07,538 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 138 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:22:07,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-17 20:22:07,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-17 20:22:07,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-17 20:22:07,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-03-17 20:22:07,552 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 27 [2022-03-17 20:22:07,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:22:07,552 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-03-17 20:22:07,552 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-03-17 20:22:07,553 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-03-17 20:22:07,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-17 20:22:07,553 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:22:07,554 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:22:07,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-17 20:22:07,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:22:07,768 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:22:07,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:22:07,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1008917278, now seen corresponding path program 1 times [2022-03-17 20:22:07,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:22:07,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900165508] [2022-03-17 20:22:07,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:22:07,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:22:07,780 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:22:07,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1138775210] [2022-03-17 20:22:07,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:22:07,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:22:07,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:22:07,782 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:22:07,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 20:22:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:22:07,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 20:22:07,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:22:08,028 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 20:22:08,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:22:08,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:22:08,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900165508] [2022-03-17 20:22:08,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:22:08,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138775210] [2022-03-17 20:22:08,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138775210] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:22:08,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:22:08,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 20:22:08,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430863376] [2022-03-17 20:22:08,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:22:08,029 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 20:22:08,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:22:08,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 20:22:08,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:22:08,030 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 20:22:08,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:22:08,121 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2022-03-17 20:22:08,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 20:22:08,122 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-17 20:22:08,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:22:08,125 INFO L225 Difference]: With dead ends: 66 [2022-03-17 20:22:08,125 INFO L226 Difference]: Without dead ends: 55 [2022-03-17 20:22:08,126 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-17 20:22:08,126 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:22:08,127 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 160 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:22:08,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-17 20:22:08,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-17 20:22:08,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-17 20:22:08,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2022-03-17 20:22:08,144 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 34 [2022-03-17 20:22:08,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:22:08,144 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2022-03-17 20:22:08,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 20:22:08,144 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2022-03-17 20:22:08,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-17 20:22:08,145 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:22:08,145 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:22:08,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 20:22:08,365 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:22:08,366 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:22:08,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:22:08,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1762200840, now seen corresponding path program 1 times [2022-03-17 20:22:08,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:22:08,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982057593] [2022-03-17 20:22:08,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:22:08,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:22:08,379 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:22:08,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [674164855] [2022-03-17 20:22:08,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:22:08,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:22:08,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:22:08,389 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:22:08,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 20:22:08,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:22:08,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-17 20:22:08,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:22:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-17 20:22:08,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:22:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-17 20:22:08,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:22:08,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982057593] [2022-03-17 20:22:08,867 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:22:08,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674164855] [2022-03-17 20:22:08,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674164855] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 20:22:08,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 20:22:08,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-17 20:22:08,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864736285] [2022-03-17 20:22:08,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:22:08,868 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 20:22:08,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:22:08,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 20:22:08,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-17 20:22:08,869 INFO L87 Difference]: Start difference. First operand 55 states and 61 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 20:22:08,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:22:08,943 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2022-03-17 20:22:08,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 20:22:08,944 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-03-17 20:22:08,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:22:08,945 INFO L225 Difference]: With dead ends: 67 [2022-03-17 20:22:08,945 INFO L226 Difference]: Without dead ends: 65 [2022-03-17 20:22:08,945 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-17 20:22:08,946 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:22:08,946 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:22:08,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-17 20:22:08,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2022-03-17 20:22:08,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 39 states have internal predecessors, (41), 15 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-17 20:22:08,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2022-03-17 20:22:08,956 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 44 [2022-03-17 20:22:08,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:22:08,957 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2022-03-17 20:22:08,957 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 20:22:08,957 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2022-03-17 20:22:08,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-17 20:22:08,958 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:22:08,958 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:22:08,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 20:22:09,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:22:09,172 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:22:09,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:22:09,172 INFO L85 PathProgramCache]: Analyzing trace with hash 2040734541, now seen corresponding path program 1 times [2022-03-17 20:22:09,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:22:09,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200062298] [2022-03-17 20:22:09,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:22:09,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:22:09,186 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:22:09,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912586745] [2022-03-17 20:22:09,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:22:09,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:22:09,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:22:09,188 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:22:09,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 20:22:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:22:09,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 20:22:09,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:22:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-17 20:22:09,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:22:09,800 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-17 20:22:09,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:22:09,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200062298] [2022-03-17 20:22:09,800 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:22:09,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912586745] [2022-03-17 20:22:09,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912586745] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:22:09,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:22:09,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-17 20:22:09,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777160520] [2022-03-17 20:22:09,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:22:09,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 20:22:09,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:22:09,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 20:22:09,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 20:22:09,802 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-17 20:22:10,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:22:10,080 INFO L93 Difference]: Finished difference Result 107 states and 133 transitions. [2022-03-17 20:22:10,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 20:22:10,081 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 51 [2022-03-17 20:22:10,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:22:10,083 INFO L225 Difference]: With dead ends: 107 [2022-03-17 20:22:10,083 INFO L226 Difference]: Without dead ends: 105 [2022-03-17 20:22:10,083 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-03-17 20:22:10,084 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 27 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 20:22:10,084 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 311 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 20:22:10,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-17 20:22:10,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2022-03-17 20:22:10,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 59 states have internal predecessors, (64), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-17 20:22:10,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2022-03-17 20:22:10,098 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 51 [2022-03-17 20:22:10,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:22:10,098 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2022-03-17 20:22:10,098 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-17 20:22:10,098 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2022-03-17 20:22:10,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-17 20:22:10,099 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:22:10,100 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:22:10,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 20:22:10,323 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:22:10,323 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:22:10,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:22:10,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1382136022, now seen corresponding path program 1 times [2022-03-17 20:22:10,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:22:10,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538926406] [2022-03-17 20:22:10,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:22:10,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:22:10,334 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:22:10,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712670074] [2022-03-17 20:22:10,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:22:10,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:22:10,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:22:10,336 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:22:10,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 20:22:10,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:22:10,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-17 20:22:10,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:22:11,177 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-17 20:22:11,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:22:45,395 WARN L232 SmtUtils]: Spent 21.16s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:23:30,552 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~B~0 4294967296))) (or (<= c_main_~d~0 c_main_~r~0) (not (= c_main_~d~0 (* c_main_~p~0 .cse0))) (let ((.cse4 (= (mod c_main_~p~0 2) 0)) (.cse10 (div c_main_~p~0 2))) (let ((.cse6 (* (+ c_main_~q~0 .cse10) .cse0)) (.cse7 (not .cse4)) (.cse1 (mod c_main_~A~0 4294967296)) (.cse2 (* (- 1) (div c_main_~d~0 2))) (.cse3 (* (+ c_main_~q~0 .cse10 1) .cse0)) (.cse9 (= (mod c_main_~d~0 2) 0)) (.cse8 (< c_main_~d~0 0))) (and (or (let ((.cse5 (< c_main_~p~0 0))) (and (or (= .cse1 (+ c_main_~r~0 .cse2 .cse3)) .cse4 (not .cse5)) (or (= .cse1 (+ .cse6 c_main_~r~0 .cse2)) (and .cse7 .cse5)))) (and .cse8 (not .cse9))) (or (and (or (= .cse1 (+ (- 1) .cse6 c_main_~r~0 .cse2)) .cse7) (or .cse4 (= .cse1 (+ (- 1) c_main_~r~0 .cse2 .cse3)))) .cse9 (not .cse8))))))) is different from true [2022-03-17 20:24:24,698 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 36 proven. 3 refuted. 0 times theorem prover too weak. 91 trivial. 5 not checked. [2022-03-17 20:24:24,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:24:24,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538926406] [2022-03-17 20:24:24,699 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:24:24,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712670074] [2022-03-17 20:24:24,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712670074] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:24:24,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:24:24,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-03-17 20:24:24,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706773963] [2022-03-17 20:24:24,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:24:24,700 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-17 20:24:24,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:24:24,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-17 20:24:24,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=244, Unknown=2, NotChecked=32, Total=342 [2022-03-17 20:24:24,701 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-17 20:24:46,029 WARN L232 SmtUtils]: Spent 18.07s on a formula simplification. DAG size of input: 67 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:24:49,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:24:49,681 INFO L93 Difference]: Finished difference Result 138 states and 177 transitions. [2022-03-17 20:24:49,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-17 20:24:49,682 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) Word has length 64 [2022-03-17 20:24:49,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:24:49,683 INFO L225 Difference]: With dead ends: 138 [2022-03-17 20:24:49,683 INFO L226 Difference]: Without dead ends: 115 [2022-03-17 20:24:49,684 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 47.5s TimeCoverageRelationStatistics Valid=119, Invalid=483, Unknown=2, NotChecked=46, Total=650 [2022-03-17 20:24:49,685 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 46 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-03-17 20:24:49,685 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 268 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 426 Invalid, 0 Unknown, 76 Unchecked, 3.7s Time] [2022-03-17 20:24:49,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-17 20:24:49,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 103. [2022-03-17 20:24:49,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 66 states have internal predecessors, (71), 27 states have call successors, (27), 14 states have call predecessors, (27), 13 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-17 20:24:49,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 123 transitions. [2022-03-17 20:24:49,701 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 123 transitions. Word has length 64 [2022-03-17 20:24:49,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:24:49,702 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 123 transitions. [2022-03-17 20:24:49,702 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-17 20:24:49,702 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 123 transitions. [2022-03-17 20:24:49,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-17 20:24:49,703 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:24:49,703 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:24:49,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 20:24:49,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:24:49,916 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:24:49,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:24:49,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1085940318, now seen corresponding path program 1 times [2022-03-17 20:24:49,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:24:49,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507183329] [2022-03-17 20:24:49,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:24:49,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:24:49,938 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:24:49,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [394140890] [2022-03-17 20:24:49,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:24:49,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:24:49,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:24:49,940 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:24:49,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 20:24:49,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:24:49,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-17 20:24:49,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:24:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 45 proven. 32 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-17 20:24:51,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:25:27,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:25:27,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507183329] [2022-03-17 20:25:27,583 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:25:27,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394140890] [2022-03-17 20:25:27,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394140890] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:25:27,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 20:25:27,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-17 20:25:27,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561559032] [2022-03-17 20:25:27,583 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 20:25:27,584 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-17 20:25:27,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:25:27,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-17 20:25:27,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-03-17 20:25:27,585 INFO L87 Difference]: Start difference. First operand 103 states and 123 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-03-17 20:25:29,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:25:29,139 INFO L93 Difference]: Finished difference Result 132 states and 160 transitions. [2022-03-17 20:25:29,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 20:25:29,140 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 75 [2022-03-17 20:25:29,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:25:29,141 INFO L225 Difference]: With dead ends: 132 [2022-03-17 20:25:29,141 INFO L226 Difference]: Without dead ends: 98 [2022-03-17 20:25:29,142 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2022-03-17 20:25:29,142 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 17 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-17 20:25:29,143 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 319 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-17 20:25:29,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-17 20:25:29,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-03-17 20:25:29,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 63 states have internal predecessors, (67), 25 states have call successors, (25), 14 states have call predecessors, (25), 13 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-17 20:25:29,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 115 transitions. [2022-03-17 20:25:29,155 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 115 transitions. Word has length 75 [2022-03-17 20:25:29,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:25:29,155 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 115 transitions. [2022-03-17 20:25:29,155 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-03-17 20:25:29,155 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 115 transitions. [2022-03-17 20:25:29,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-17 20:25:29,156 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:25:29,156 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:25:29,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 20:25:29,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:25:29,379 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:25:29,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:25:29,380 INFO L85 PathProgramCache]: Analyzing trace with hash -879208114, now seen corresponding path program 1 times [2022-03-17 20:25:29,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:25:29,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717327386] [2022-03-17 20:25:29,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:25:29,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:25:29,388 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:25:29,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587519348] [2022-03-17 20:25:29,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:25:29,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:25:29,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:25:29,391 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:25:29,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 20:25:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:25:29,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-17 20:25:29,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:25:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-17 20:25:29,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:25:29,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:25:29,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717327386] [2022-03-17 20:25:29,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:25:29,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587519348] [2022-03-17 20:25:29,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587519348] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:25:29,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:25:29,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 20:25:29,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904867420] [2022-03-17 20:25:29,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:25:29,593 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 20:25:29,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:25:29,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 20:25:29,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:25:29,594 INFO L87 Difference]: Start difference. First operand 98 states and 115 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-17 20:25:29,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:25:29,653 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2022-03-17 20:25:29,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 20:25:29,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 79 [2022-03-17 20:25:29,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:25:29,655 INFO L225 Difference]: With dead ends: 108 [2022-03-17 20:25:29,655 INFO L226 Difference]: Without dead ends: 100 [2022-03-17 20:25:29,656 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:25:29,656 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 9 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:25:29,657 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 114 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:25:29,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-17 20:25:29,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-03-17 20:25:29,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 63 states have internal predecessors, (68), 25 states have call successors, (25), 14 states have call predecessors, (25), 13 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-17 20:25:29,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 116 transitions. [2022-03-17 20:25:29,668 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 116 transitions. Word has length 79 [2022-03-17 20:25:29,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:25:29,668 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 116 transitions. [2022-03-17 20:25:29,668 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-17 20:25:29,668 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 116 transitions. [2022-03-17 20:25:29,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-17 20:25:29,670 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:25:29,670 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:25:29,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 20:25:29,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:25:29,883 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:25:29,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:25:29,884 INFO L85 PathProgramCache]: Analyzing trace with hash -233495842, now seen corresponding path program 2 times [2022-03-17 20:25:29,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:25:29,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385887341] [2022-03-17 20:25:29,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:25:29,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:25:29,894 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:25:29,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [841796155] [2022-03-17 20:25:29,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 20:25:29,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:25:29,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:25:29,896 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:25:29,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 20:25:29,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 20:25:29,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 20:25:29,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-17 20:25:29,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:25:30,691 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-17 20:25:30,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:26:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-17 20:26:19,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:26:19,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385887341] [2022-03-17 20:26:19,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:26:19,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841796155] [2022-03-17 20:26:19,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841796155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:26:19,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:26:19,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2022-03-17 20:26:19,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777788187] [2022-03-17 20:26:19,628 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:26:19,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-17 20:26:19,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:26:19,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-17 20:26:19,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=296, Unknown=1, NotChecked=0, Total=380 [2022-03-17 20:26:19,629 INFO L87 Difference]: Start difference. First operand 100 states and 116 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 13 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (28), 11 states have call predecessors, (28), 11 states have call successors, (28) [2022-03-17 20:26:53,905 WARN L232 SmtUtils]: Spent 31.02s on a formula simplification. DAG size of input: 231 DAG size of output: 106 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:27:15,418 WARN L232 SmtUtils]: Spent 11.42s on a formula simplification. DAG size of input: 84 DAG size of output: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:27:30,783 WARN L232 SmtUtils]: Spent 15.15s on a formula simplification. DAG size of input: 109 DAG size of output: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:27:43,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:27:43,399 INFO L93 Difference]: Finished difference Result 200 states and 254 transitions. [2022-03-17 20:27:43,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-17 20:27:43,400 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 13 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (28), 11 states have call predecessors, (28), 11 states have call successors, (28) Word has length 94 [2022-03-17 20:27:43,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:27:43,402 INFO L225 Difference]: With dead ends: 200 [2022-03-17 20:27:43,402 INFO L226 Difference]: Without dead ends: 162 [2022-03-17 20:27:43,403 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 84.4s TimeCoverageRelationStatistics Valid=201, Invalid=668, Unknown=1, NotChecked=0, Total=870 [2022-03-17 20:27:43,404 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 90 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:27:43,404 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 664 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 12.0s Time] [2022-03-17 20:27:43,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-03-17 20:27:43,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 143. [2022-03-17 20:27:43,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 89 states have (on average 1.1235955056179776) internal successors, (100), 92 states have internal predecessors, (100), 35 states have call successors, (35), 19 states have call predecessors, (35), 18 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-17 20:27:43,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 168 transitions. [2022-03-17 20:27:43,448 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 168 transitions. Word has length 94 [2022-03-17 20:27:43,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:27:43,448 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 168 transitions. [2022-03-17 20:27:43,448 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 13 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (28), 11 states have call predecessors, (28), 11 states have call successors, (28) [2022-03-17 20:27:43,448 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 168 transitions. [2022-03-17 20:27:43,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-17 20:27:43,450 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:27:43,450 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:27:43,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 20:27:43,663 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,SelfDestructingSolverStorable10 [2022-03-17 20:27:43,663 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:27:43,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:27:43,664 INFO L85 PathProgramCache]: Analyzing trace with hash -756046477, now seen corresponding path program 3 times [2022-03-17 20:27:43,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:27:43,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579917457] [2022-03-17 20:27:43,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:27:43,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:27:43,672 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:27:43,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607658733] [2022-03-17 20:27:43,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 20:27:43,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:27:43,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:27:43,673 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:27:43,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 20:27:43,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-17 20:27:43,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 20:27:43,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-17 20:27:43,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:27:44,254 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 42 proven. 51 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-03-17 20:27:44,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:28:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 52 proven. 41 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-03-17 20:28:17,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:28:17,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579917457] [2022-03-17 20:28:17,087 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:28:17,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607658733] [2022-03-17 20:28:17,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607658733] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:28:17,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:28:17,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2022-03-17 20:28:17,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272150446] [2022-03-17 20:28:17,088 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:28:17,088 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-17 20:28:17,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:28:17,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-17 20:28:17,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-03-17 20:28:17,089 INFO L87 Difference]: Start difference. First operand 143 states and 168 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 10 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 11 states have call predecessors, (31), 10 states have call successors, (31) [2022-03-17 20:28:33,177 WARN L232 SmtUtils]: Spent 15.62s on a formula simplification. DAG size of input: 132 DAG size of output: 19 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:28:43,727 WARN L232 SmtUtils]: Spent 9.49s on a formula simplification. DAG size of input: 42 DAG size of output: 15 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:28:44,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:28:44,792 INFO L93 Difference]: Finished difference Result 199 states and 240 transitions. [2022-03-17 20:28:44,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-17 20:28:44,793 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 10 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 11 states have call predecessors, (31), 10 states have call successors, (31) Word has length 99 [2022-03-17 20:28:44,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:28:44,794 INFO L225 Difference]: With dead ends: 199 [2022-03-17 20:28:44,794 INFO L226 Difference]: Without dead ends: 169 [2022-03-17 20:28:44,795 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 177 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-03-17 20:28:44,795 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 60 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:28:44,796 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 381 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-17 20:28:44,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-17 20:28:44,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2022-03-17 20:28:44,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 104 states have (on average 1.1153846153846154) internal successors, (116), 110 states have internal predecessors, (116), 42 states have call successors, (42), 22 states have call predecessors, (42), 21 states have return successors, (40), 35 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-17 20:28:44,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 198 transitions. [2022-03-17 20:28:44,818 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 198 transitions. Word has length 99 [2022-03-17 20:28:44,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:28:44,818 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 198 transitions. [2022-03-17 20:28:44,819 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 10 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 11 states have call predecessors, (31), 10 states have call successors, (31) [2022-03-17 20:28:44,819 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 198 transitions. [2022-03-17 20:28:44,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-17 20:28:44,820 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:28:44,820 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:28:44,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 20:28:45,033 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:28:45,034 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:28:45,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:28:45,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1771017874, now seen corresponding path program 2 times [2022-03-17 20:28:45,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:28:45,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947491235] [2022-03-17 20:28:45,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:28:45,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:28:45,041 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:28:45,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [571693408] [2022-03-17 20:28:45,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 20:28:45,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:28:45,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:28:45,043 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:28:45,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 20:28:45,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 20:28:45,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 20:28:45,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-17 20:28:45,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:35:13,226 WARN L232 SmtUtils]: Spent 10.35s on a formula simplification that was a NOOP. DAG size: 10004 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)