/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-fpi/s1if.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:04:07,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:04:07,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:04:07,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:04:07,845 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:04:07,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:04:07,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:04:07,853 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:04:07,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:04:07,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:04:07,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:04:07,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:04:07,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:04:07,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:04:07,867 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:04:07,868 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:04:07,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:04:07,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:04:07,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:04:07,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:04:07,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:04:07,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:04:07,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:04:07,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:04:07,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 03:04:07,887 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 03:04:07,888 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 03:04:07,889 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 03:04:07,889 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 03:04:07,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 03:04:07,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:04:07,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:04:07,893 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:04:07,893 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:04:07,894 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:04:07,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:04:07,895 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:04:07,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:04:07,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:04:07,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:04:07,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:04:07,898 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 03:04:07,932 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:04:07,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:04:07,933 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:04:07,933 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:04:07,934 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:04:07,934 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:04:07,934 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:04:07,934 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:04:07,934 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:04:07,935 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:04:07,935 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:04:07,936 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:04:07,936 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:04:07,936 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:04:07,936 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:04:07,936 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:04:07,936 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:04:07,936 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:04:07,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:04:07,937 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:04:07,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:04:07,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:04:07,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:04:07,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:04:07,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:04:07,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:04:07,938 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:04:07,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:04:07,939 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:04:07,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:04:07,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:04:07,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:04:07,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:04:07,939 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:04:07,939 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:04:07,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:04:07,940 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:04:07,940 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:04:07,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:04:07,940 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:04:07,940 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:04:07,940 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:04:08,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:04:08,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:04:08,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:04:08,177 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:04:08,177 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:04:08,178 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s1if.c [2023-04-01 03:04:09,470 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:04:09,660 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:04:09,661 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s1if.c [2023-04-01 03:04:09,666 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd29d35e0/6d8190fbf2324d1d99b4a504ec3ba57b/FLAG8806100ec [2023-04-01 03:04:09,677 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd29d35e0/6d8190fbf2324d1d99b4a504ec3ba57b [2023-04-01 03:04:09,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:04:09,681 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:04:09,682 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:04:09,682 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:04:09,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:04:09,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:04:09" (1/1) ... [2023-04-01 03:04:09,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29bc74af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:09, skipping insertion in model container [2023-04-01 03:04:09,687 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:04:09" (1/1) ... [2023-04-01 03:04:09,693 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:04:09,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:04:09,817 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s1if.c[587,600] [2023-04-01 03:04:09,832 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:04:09,839 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:04:09,850 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s1if.c[587,600] [2023-04-01 03:04:09,856 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:04:09,869 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:04:09,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:09 WrapperNode [2023-04-01 03:04:09,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:04:09,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:04:09,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:04:09,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:04:09,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:09" (1/1) ... [2023-04-01 03:04:09,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:09" (1/1) ... [2023-04-01 03:04:09,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:09" (1/1) ... [2023-04-01 03:04:09,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:09" (1/1) ... [2023-04-01 03:04:09,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:09" (1/1) ... [2023-04-01 03:04:09,909 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:09" (1/1) ... [2023-04-01 03:04:09,921 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:09" (1/1) ... [2023-04-01 03:04:09,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:09" (1/1) ... [2023-04-01 03:04:09,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:04:09,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:04:09,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:04:09,925 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:04:09,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:09" (1/1) ... [2023-04-01 03:04:09,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:04:09,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:04:09,963 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) [2023-04-01 03:04:09,965 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 [2023-04-01 03:04:09,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:04:09,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:04:09,999 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:04:09,999 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 03:04:09,999 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 03:04:09,999 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:04:10,000 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:04:10,000 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:04:10,000 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:04:10,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:04:10,000 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 03:04:10,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 03:04:10,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:04:10,000 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 03:04:10,001 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:04:10,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 03:04:10,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 03:04:10,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:04:10,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:04:10,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:04:10,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:04:10,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:04:10,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:04:10,067 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:04:10,069 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:04:10,212 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:04:10,292 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:04:10,293 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 03:04:10,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:04:10 BoogieIcfgContainer [2023-04-01 03:04:10,295 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:04:10,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:04:10,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:04:10,317 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:04:10,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:04:09" (1/3) ... [2023-04-01 03:04:10,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28b56f0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:04:10, skipping insertion in model container [2023-04-01 03:04:10,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:09" (2/3) ... [2023-04-01 03:04:10,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28b56f0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:04:10, skipping insertion in model container [2023-04-01 03:04:10,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:04:10" (3/3) ... [2023-04-01 03:04:10,320 INFO L112 eAbstractionObserver]: Analyzing ICFG s1if.c [2023-04-01 03:04:10,349 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:04:10,349 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:04:10,390 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:04:10,395 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@558a245c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:04:10,395 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:04:10,398 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 03:04:10,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 03:04:10,404 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:04:10,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:04:10,405 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:04:10,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:04:10,410 INFO L85 PathProgramCache]: Analyzing trace with hash 2049730117, now seen corresponding path program 1 times [2023-04-01 03:04:10,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:04:10,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584820650] [2023-04-01 03:04:10,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:04:10,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:04:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:04:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:10,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:04:10,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584820650] [2023-04-01 03:04:10,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584820650] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:04:10,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:04:10,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 03:04:10,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521084089] [2023-04-01 03:04:10,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:04:10,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 03:04:10,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:04:10,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 03:04:10,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 03:04:10,800 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:04:10,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:04:10,879 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2023-04-01 03:04:10,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 03:04:10,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-04-01 03:04:10,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:04:10,889 INFO L225 Difference]: With dead ends: 43 [2023-04-01 03:04:10,890 INFO L226 Difference]: Without dead ends: 19 [2023-04-01 03:04:10,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 03:04:10,897 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:04:10,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 42 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:04:10,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-01 03:04:10,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-04-01 03:04:10,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:04:10,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-04-01 03:04:10,925 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2023-04-01 03:04:10,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:04:10,926 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-04-01 03:04:10,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:04:10,929 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-04-01 03:04:10,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 03:04:10,930 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:04:10,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:04:10,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:04:10,931 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:04:10,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:04:10,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1910355142, now seen corresponding path program 1 times [2023-04-01 03:04:10,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:04:10,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128896030] [2023-04-01 03:04:10,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:04:10,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:04:10,973 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:04:10,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930124112] [2023-04-01 03:04:10,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:04:10,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:10,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:04:10,978 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) [2023-04-01 03:04:10,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 03:04:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:04:11,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 36 conjunts are in the unsatisfiable core [2023-04-01 03:04:11,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:04:11,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 03:04:11,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:04:11,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 03:04:11,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:04:11,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-04-01 03:04:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:11,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:04:11,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-04-01 03:04:11,748 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 03:04:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:11,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:04:11,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128896030] [2023-04-01 03:04:11,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:04:11,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930124112] [2023-04-01 03:04:11,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930124112] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:04:11,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [838342713] [2023-04-01 03:04:11,854 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:04:11,855 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:04:11,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:04:11,864 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:04:11,864 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:04:11,978 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:04:12,375 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-04-01 03:04:12,413 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:04:12,422 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:04:12,437 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:04:13,295 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '246#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_1| Int)) (and (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_1|)) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_1|) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_1|)) (not (= (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_1|) 0) ~N~0)) (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_1| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_1|))) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:04:13,295 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:04:13,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:04:13,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-04-01 03:04:13,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372544933] [2023-04-01 03:04:13,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:04:13,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 03:04:13,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:04:13,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 03:04:13,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 03:04:13,301 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 21 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:04:13,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:04:13,552 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2023-04-01 03:04:13,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 03:04:13,553 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 18 [2023-04-01 03:04:13,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:04:13,554 INFO L225 Difference]: With dead ends: 27 [2023-04-01 03:04:13,554 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 03:04:13,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=190, Invalid=1292, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 03:04:13,556 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:04:13,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 52 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:04:13,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 03:04:13,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2023-04-01 03:04:13,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:04:13,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-04-01 03:04:13,563 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2023-04-01 03:04:13,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:04:13,563 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-04-01 03:04:13,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:04:13,564 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-04-01 03:04:13,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 03:04:13,564 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:04:13,564 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:04:13,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 03:04:13,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:13,772 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:04:13,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:04:13,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1034670718, now seen corresponding path program 2 times [2023-04-01 03:04:13,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:04:13,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458912502] [2023-04-01 03:04:13,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:04:13,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:04:13,805 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:04:13,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [51826986] [2023-04-01 03:04:13,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:04:13,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:13,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:04:13,810 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) [2023-04-01 03:04:13,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 03:04:13,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 03:04:13,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:04:13,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 03:04:13,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:04:13,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:13,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:04:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:14,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:04:14,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458912502] [2023-04-01 03:04:14,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:04:14,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51826986] [2023-04-01 03:04:14,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51826986] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:04:14,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1039130018] [2023-04-01 03:04:14,020 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:04:14,021 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:04:14,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:04:14,021 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:04:14,021 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:04:14,079 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:04:14,286 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-04-01 03:04:14,306 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:04:14,311 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:04:14,319 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:04:14,924 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '466#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_2| Int)) (and (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_2| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_2|) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_2|) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_2|)) (not (= (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_2|) 0) ~N~0)) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_2|)))) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:04:14,924 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:04:14,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:04:14,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-04-01 03:04:14,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458414961] [2023-04-01 03:04:14,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:04:14,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 03:04:14,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:04:14,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 03:04:14,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2023-04-01 03:04:14,927 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:04:15,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:04:15,023 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2023-04-01 03:04:15,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:04:15,024 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (4), 2 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 19 [2023-04-01 03:04:15,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:04:15,027 INFO L225 Difference]: With dead ends: 30 [2023-04-01 03:04:15,027 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 03:04:15,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2023-04-01 03:04:15,029 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 03:04:15,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 55 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 03:04:15,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 03:04:15,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2023-04-01 03:04:15,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:04:15,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-04-01 03:04:15,040 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 19 [2023-04-01 03:04:15,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:04:15,040 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-04-01 03:04:15,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:04:15,041 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-04-01 03:04:15,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 03:04:15,042 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:04:15,042 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:04:15,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 03:04:15,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 03:04:15,252 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:04:15,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:04:15,253 INFO L85 PathProgramCache]: Analyzing trace with hash -2078488509, now seen corresponding path program 3 times [2023-04-01 03:04:15,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:04:15,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495426076] [2023-04-01 03:04:15,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:04:15,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:04:15,269 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:04:15,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150718848] [2023-04-01 03:04:15,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 03:04:15,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:15,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:04:15,282 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) [2023-04-01 03:04:15,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 03:04:15,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 03:04:15,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:04:15,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 03:04:15,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:04:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:15,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:04:15,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:15,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:04:15,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495426076] [2023-04-01 03:04:15,426 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:04:15,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150718848] [2023-04-01 03:04:15,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150718848] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:04:15,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2010773423] [2023-04-01 03:04:15,429 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:04:15,429 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:04:15,429 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:04:15,430 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:04:15,430 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:04:15,482 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:04:15,643 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-04-01 03:04:15,661 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:04:15,665 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:04:15,672 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:04:16,287 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '689#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_3| Int)) (and (not (= (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_3|) 0) ~N~0)) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_3|)) (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_3| |#StackHeapBarrier|)) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_3|) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_3|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_3|))) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:04:16,288 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:04:16,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:04:16,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-01 03:04:16,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292732200] [2023-04-01 03:04:16,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:04:16,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 03:04:16,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:04:16,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 03:04:16,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-04-01 03:04:16,290 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:04:16,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:04:16,372 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2023-04-01 03:04:16,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:04:16,373 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (4), 2 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 19 [2023-04-01 03:04:16,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:04:16,374 INFO L225 Difference]: With dead ends: 26 [2023-04-01 03:04:16,374 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 03:04:16,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2023-04-01 03:04:16,375 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 03:04:16,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 47 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 03:04:16,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 03:04:16,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 03:04:16,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:04:16,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-04-01 03:04:16,381 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2023-04-01 03:04:16,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:04:16,381 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-04-01 03:04:16,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:04:16,381 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-04-01 03:04:16,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 03:04:16,382 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:04:16,382 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:04:16,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 03:04:16,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:16,583 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:04:16,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:04:16,584 INFO L85 PathProgramCache]: Analyzing trace with hash -134772315, now seen corresponding path program 4 times [2023-04-01 03:04:16,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:04:16,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284078032] [2023-04-01 03:04:16,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:04:16,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:04:16,599 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:04:16,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937137937] [2023-04-01 03:04:16,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 03:04:16,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:16,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:04:16,610 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) [2023-04-01 03:04:16,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 03:04:16,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:04:16,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-01 03:04:16,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:04:16,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 03:04:16,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:04:16,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 03:04:16,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:04:16,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 03:04:17,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:04:17,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 03:04:17,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:04:17,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 03:04:17,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:17,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:04:17,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-04-01 03:04:17,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-04-01 03:04:17,557 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 03:04:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:17,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:04:17,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284078032] [2023-04-01 03:04:17,581 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:04:17,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937137937] [2023-04-01 03:04:17,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937137937] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:04:17,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1086130419] [2023-04-01 03:04:17,583 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:04:17,583 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:04:17,583 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:04:17,584 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:04:17,584 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:04:17,610 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:04:17,744 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-04-01 03:04:17,759 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:04:17,762 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:04:17,768 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:04:18,513 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '925#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_4| Int)) (and (not (= ~N~0 (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_4|) 0))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_4|) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_4|)) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_4|)) (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_4| |#StackHeapBarrier|)) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_4|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:04:18,513 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:04:18,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:04:18,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2023-04-01 03:04:18,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939595066] [2023-04-01 03:04:18,514 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:04:18,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-01 03:04:18,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:04:18,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-01 03:04:18,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 03:04:18,516 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 22 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:04:19,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:04:19,630 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2023-04-01 03:04:19,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 03:04:19,630 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2023-04-01 03:04:19,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:04:19,631 INFO L225 Difference]: With dead ends: 32 [2023-04-01 03:04:19,631 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 03:04:19,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=164, Invalid=1642, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 03:04:19,633 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:04:19,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 92 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:04:19,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 03:04:19,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2023-04-01 03:04:19,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:04:19,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-04-01 03:04:19,641 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2023-04-01 03:04:19,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:04:19,641 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-04-01 03:04:19,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:04:19,641 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-04-01 03:04:19,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 03:04:19,642 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:04:19,642 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:04:19,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 03:04:19,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:19,850 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:04:19,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:04:19,851 INFO L85 PathProgramCache]: Analyzing trace with hash -9112445, now seen corresponding path program 5 times [2023-04-01 03:04:19,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:04:19,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528228330] [2023-04-01 03:04:19,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:04:19,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:04:19,867 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:04:19,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074725497] [2023-04-01 03:04:19,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:04:19,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:19,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:04:19,882 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) [2023-04-01 03:04:19,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 03:04:19,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 03:04:19,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:04:19,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 03:04:19,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:04:20,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:20,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:04:20,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:20,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:04:20,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528228330] [2023-04-01 03:04:20,089 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:04:20,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074725497] [2023-04-01 03:04:20,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074725497] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:04:20,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [332020063] [2023-04-01 03:04:20,092 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:04:20,093 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:04:20,093 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:04:20,093 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:04:20,093 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:04:20,122 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:04:20,265 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-04-01 03:04:20,280 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:04:20,284 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:04:20,291 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:04:20,831 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1180#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_5| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_5|) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_5|) (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_5| |#StackHeapBarrier|)) (not (= ~N~0 (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_5|) 0))) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_5|)) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_5|)))) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:04:20,831 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:04:20,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:04:20,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-04-01 03:04:20,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861797230] [2023-04-01 03:04:20,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:04:20,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 03:04:20,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:04:20,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 03:04:20,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2023-04-01 03:04:20,834 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:04:20,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:04:20,935 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2023-04-01 03:04:20,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 03:04:20,935 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 2 states have call successors, (4), 2 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 21 [2023-04-01 03:04:20,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:04:20,936 INFO L225 Difference]: With dead ends: 33 [2023-04-01 03:04:20,936 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 03:04:20,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2023-04-01 03:04:20,939 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 03:04:20,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 53 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 03:04:20,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 03:04:20,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2023-04-01 03:04:20,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:04:20,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-04-01 03:04:20,946 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 21 [2023-04-01 03:04:20,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:04:20,946 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-04-01 03:04:20,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:04:20,947 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-04-01 03:04:20,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 03:04:20,947 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:04:20,947 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:04:20,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 03:04:21,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:21,158 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:04:21,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:04:21,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1992274402, now seen corresponding path program 6 times [2023-04-01 03:04:21,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:04:21,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138425817] [2023-04-01 03:04:21,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:04:21,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:04:21,184 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:04:21,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051741510] [2023-04-01 03:04:21,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 03:04:21,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:21,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:04:21,186 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) [2023-04-01 03:04:21,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 03:04:21,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 03:04:21,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:04:21,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 03:04:21,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:04:21,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:21,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:04:21,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:21,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:04:21,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138425817] [2023-04-01 03:04:21,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:04:21,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051741510] [2023-04-01 03:04:21,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051741510] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:04:21,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [174654392] [2023-04-01 03:04:21,370 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:04:21,370 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:04:21,370 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:04:21,371 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:04:21,371 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:04:21,400 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:04:21,542 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-04-01 03:04:21,573 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:04:21,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:04:21,585 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:04:22,113 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1430#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_6| Int)) (and (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_6|)) (not (= ~N~0 (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_6|) 0))) (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_6| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_6|) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_6|) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_6|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:04:22,115 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:04:22,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:04:22,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-04-01 03:04:22,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023919380] [2023-04-01 03:04:22,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:04:22,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 03:04:22,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:04:22,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 03:04:22,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2023-04-01 03:04:22,122 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:04:22,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:04:22,233 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2023-04-01 03:04:22,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 03:04:22,234 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (4), 2 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 21 [2023-04-01 03:04:22,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:04:22,234 INFO L225 Difference]: With dead ends: 28 [2023-04-01 03:04:22,234 INFO L226 Difference]: Without dead ends: 23 [2023-04-01 03:04:22,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2023-04-01 03:04:22,236 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 03:04:22,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 39 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 03:04:22,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-01 03:04:22,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-04-01 03:04:22,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:04:22,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2023-04-01 03:04:22,246 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2023-04-01 03:04:22,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:04:22,247 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2023-04-01 03:04:22,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:04:22,247 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2023-04-01 03:04:22,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 03:04:22,247 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:04:22,247 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:04:22,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 03:04:22,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:22,451 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:04:22,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:04:22,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1504826342, now seen corresponding path program 7 times [2023-04-01 03:04:22,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:04:22,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653582247] [2023-04-01 03:04:22,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:04:22,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:04:22,471 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:04:22,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1070660586] [2023-04-01 03:04:22,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 03:04:22,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:22,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:04:22,488 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) [2023-04-01 03:04:22,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 03:04:22,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:04:22,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 60 conjunts are in the unsatisfiable core [2023-04-01 03:04:22,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:04:22,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 03:04:22,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:04:22,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 03:04:22,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:04:22,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 03:04:22,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:04:22,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-04-01 03:04:22,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:04:22,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-04-01 03:04:22,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:04:22,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-04-01 03:04:22,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:04:22,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-04-01 03:04:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:23,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:04:23,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-04-01 03:04:23,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-04-01 03:04:23,272 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:04:23,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2023-04-01 03:04:23,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-04-01 03:04:23,762 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 03:04:23,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:23,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:04:23,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653582247] [2023-04-01 03:04:23,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:04:23,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070660586] [2023-04-01 03:04:23,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070660586] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:04:23,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [356770998] [2023-04-01 03:04:23,785 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:04:23,785 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:04:23,785 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:04:23,786 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:04:23,786 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:04:23,813 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:04:23,931 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-04-01 03:04:23,945 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:04:23,949 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:04:23,954 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:04:24,689 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1692#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_7| Int)) (and (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_7|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_7|) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_7|)) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_7|)) (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_7| |#StackHeapBarrier|)) (not (= ~N~0 (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_7|) 0))))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:04:24,689 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:04:24,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:04:24,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2023-04-01 03:04:24,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690551109] [2023-04-01 03:04:24,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:04:24,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 03:04:24,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:04:24,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 03:04:24,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1431, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 03:04:24,692 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 26 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:04:29,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:04:29,383 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2023-04-01 03:04:29,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 03:04:29,383 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2023-04-01 03:04:29,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:04:29,384 INFO L225 Difference]: With dead ends: 35 [2023-04-01 03:04:29,384 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 03:04:29,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=187, Invalid=1975, Unknown=0, NotChecked=0, Total=2162 [2023-04-01 03:04:29,386 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:04:29,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 92 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 03:04:29,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 03:04:29,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2023-04-01 03:04:29,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:04:29,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-04-01 03:04:29,394 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2023-04-01 03:04:29,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:04:29,394 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-04-01 03:04:29,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:04:29,395 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-04-01 03:04:29,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 03:04:29,395 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:04:29,395 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:04:29,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 03:04:29,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:29,596 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:04:29,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:04:29,596 INFO L85 PathProgramCache]: Analyzing trace with hash -721161630, now seen corresponding path program 8 times [2023-04-01 03:04:29,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:04:29,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791266349] [2023-04-01 03:04:29,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:04:29,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:04:29,619 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:04:29,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960945471] [2023-04-01 03:04:29,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:04:29,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:29,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:04:29,621 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) [2023-04-01 03:04:29,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 03:04:29,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 03:04:29,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:04:29,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 03:04:29,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:04:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:29,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:04:29,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:29,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:04:29,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791266349] [2023-04-01 03:04:29,826 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:04:29,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960945471] [2023-04-01 03:04:29,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960945471] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:04:29,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [180889365] [2023-04-01 03:04:29,830 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:04:29,830 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:04:29,830 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:04:29,830 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:04:29,830 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:04:29,852 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:04:29,994 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-04-01 03:04:30,008 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:04:30,011 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:04:30,017 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:04:30,578 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1972#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_8| Int)) (and (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_8|)) (not (= (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_8|) 0) ~N~0)) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_8|) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_8|)) (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_8| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_8|))) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:04:30,578 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:04:30,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:04:30,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2023-04-01 03:04:30,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034087814] [2023-04-01 03:04:30,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:04:30,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 03:04:30,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:04:30,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 03:04:30,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2023-04-01 03:04:30,580 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:04:30,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:04:30,748 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2023-04-01 03:04:30,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 03:04:30,748 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 2 states have call successors, (4), 2 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 23 [2023-04-01 03:04:30,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:04:30,749 INFO L225 Difference]: With dead ends: 36 [2023-04-01 03:04:30,749 INFO L226 Difference]: Without dead ends: 26 [2023-04-01 03:04:30,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 03:04:30,750 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:04:30,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 77 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:04:30,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-01 03:04:30,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-04-01 03:04:30,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:04:30,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-04-01 03:04:30,759 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 23 [2023-04-01 03:04:30,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:04:30,760 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-04-01 03:04:30,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:04:30,760 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-04-01 03:04:30,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 03:04:30,760 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:04:30,761 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:04:30,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 03:04:30,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-01 03:04:30,973 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:04:30,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:04:30,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1192288483, now seen corresponding path program 9 times [2023-04-01 03:04:30,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:04:30,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050083367] [2023-04-01 03:04:30,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:04:30,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:04:30,985 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:04:30,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640967334] [2023-04-01 03:04:30,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 03:04:30,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:30,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:04:30,987 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) [2023-04-01 03:04:31,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 03:04:31,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 03:04:31,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:04:31,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 03:04:31,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:04:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:31,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:04:31,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:31,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:04:31,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050083367] [2023-04-01 03:04:31,237 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:04:31,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640967334] [2023-04-01 03:04:31,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640967334] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:04:31,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1077553834] [2023-04-01 03:04:31,238 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:04:31,238 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:04:31,238 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:04:31,239 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:04:31,239 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:04:31,262 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:04:31,415 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-04-01 03:04:31,430 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:04:31,433 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:04:31,439 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:04:31,931 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2249#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_9| Int)) (and (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_9|)) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_9|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_9|) (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_9| |#StackHeapBarrier|)) (not (= (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_9|) 0) ~N~0)) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_9|)))) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:04:31,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:04:31,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:04:31,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-04-01 03:04:31,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218057062] [2023-04-01 03:04:31,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:04:31,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 03:04:31,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:04:31,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 03:04:31,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2023-04-01 03:04:31,934 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:04:32,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:04:32,057 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2023-04-01 03:04:32,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 03:04:32,058 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (4), 2 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 23 [2023-04-01 03:04:32,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:04:32,058 INFO L225 Difference]: With dead ends: 30 [2023-04-01 03:04:32,058 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 03:04:32,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 03:04:32,059 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:04:32,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 39 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:04:32,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 03:04:32,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-01 03:04:32,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:04:32,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-04-01 03:04:32,068 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2023-04-01 03:04:32,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:04:32,069 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-04-01 03:04:32,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:04:32,069 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-04-01 03:04:32,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 03:04:32,069 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:04:32,070 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:04:32,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 03:04:32,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 03:04:32,273 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:04:32,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:04:32,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1819900667, now seen corresponding path program 10 times [2023-04-01 03:04:32,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:04:32,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126701817] [2023-04-01 03:04:32,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:04:32,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:04:32,288 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:04:32,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978830135] [2023-04-01 03:04:32,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 03:04:32,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:32,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:04:32,289 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) [2023-04-01 03:04:32,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 03:04:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:04:32,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 72 conjunts are in the unsatisfiable core [2023-04-01 03:04:32,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:04:32,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 03:04:32,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:04:32,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 03:04:32,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:04:32,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 03:04:32,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:04:32,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-04-01 03:04:32,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:04:32,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 48 [2023-04-01 03:04:32,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:04:32,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 51 [2023-04-01 03:04:32,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:04:32,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 51 [2023-04-01 03:04:32,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:04:32,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 51 [2023-04-01 03:04:32,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:04:32,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 51 [2023-04-01 03:04:32,944 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:32,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:04:33,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-04-01 03:04:33,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-04-01 03:04:33,140 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:04:33,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2023-04-01 03:04:33,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-04-01 03:04:33,207 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:04:33,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2023-04-01 03:04:33,213 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:04:33,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2023-04-01 03:04:33,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-04-01 03:04:34,708 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 03:04:34,726 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:34,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:04:34,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126701817] [2023-04-01 03:04:34,726 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:04:34,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978830135] [2023-04-01 03:04:34,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978830135] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:04:34,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [605134627] [2023-04-01 03:04:34,728 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:04:34,728 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:04:34,728 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:04:34,728 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:04:34,728 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:04:34,749 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:04:34,898 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-04-01 03:04:34,911 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:04:34,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:04:34,921 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:04:35,958 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2537#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_10| Int)) (and (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_10|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#sum~0.base_BEFORE_CALL_10|)) (not (= ~N~0 (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_10|) 0))) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_10|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_10|) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_10|)))) (= |#NULL.base| 0))' at error location [2023-04-01 03:04:35,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:04:35,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:04:35,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2023-04-01 03:04:35,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263978597] [2023-04-01 03:04:35,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:04:35,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-04-01 03:04:35,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:04:35,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-04-01 03:04:35,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1743, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 03:04:35,960 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 30 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:04:52,793 WARN L223 SmtUtils]: Spent 5.85s on a formula simplification that was a NOOP. DAG size: 178 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 03:05:00,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:05:00,136 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2023-04-01 03:05:00,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 03:05:00,137 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2023-04-01 03:05:00,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:05:00,137 INFO L225 Difference]: With dead ends: 38 [2023-04-01 03:05:00,137 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 03:05:00,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=212, Invalid=2338, Unknown=0, NotChecked=0, Total=2550 [2023-04-01 03:05:00,139 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-04-01 03:05:00,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 112 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-04-01 03:05:00,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 03:05:00,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2023-04-01 03:05:00,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:05:00,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-04-01 03:05:00,152 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2023-04-01 03:05:00,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:05:00,152 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-04-01 03:05:00,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:05:00,152 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-04-01 03:05:00,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 03:05:00,153 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:05:00,153 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:05:00,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 03:05:00,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 03:05:00,357 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:05:00,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:05:00,357 INFO L85 PathProgramCache]: Analyzing trace with hash -708483805, now seen corresponding path program 11 times [2023-04-01 03:05:00,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:05:00,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109995986] [2023-04-01 03:05:00,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:05:00,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:05:00,372 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:05:00,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1860797094] [2023-04-01 03:05:00,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:05:00,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:05:00,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:05:00,374 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:05:00,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 03:05:00,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 03:05:00,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:05:00,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 03:05:00,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:05:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:00,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:05:00,681 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:00,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:05:00,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109995986] [2023-04-01 03:05:00,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:05:00,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860797094] [2023-04-01 03:05:00,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860797094] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:05:00,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [472500545] [2023-04-01 03:05:00,684 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:05:00,684 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:05:00,684 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:05:00,684 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:05:00,684 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:05:00,720 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:05:00,844 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-04-01 03:05:00,860 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:05:00,863 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:05:00,869 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:05:01,444 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2842#(and (exists ((|v_main_~#sum~0.base_BEFORE_CALL_11| Int)) (and (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_11|)) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_11|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#sum~0.base_BEFORE_CALL_11|)) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_11|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_11|) (not (= ~N~0 (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_11|) 0))))) (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:05:01,444 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:05:01,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:05:01,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2023-04-01 03:05:01,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633222834] [2023-04-01 03:05:01,445 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:05:01,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 03:05:01,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:05:01,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 03:05:01,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2023-04-01 03:05:01,446 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:05:01,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:05:01,602 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2023-04-01 03:05:01,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 03:05:01,603 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (4), 2 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 25 [2023-04-01 03:05:01,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:05:01,604 INFO L225 Difference]: With dead ends: 39 [2023-04-01 03:05:01,605 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 03:05:01,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=185, Invalid=1147, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 03:05:01,606 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:05:01,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 64 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:05:01,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 03:05:01,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2023-04-01 03:05:01,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:05:01,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-04-01 03:05:01,631 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 25 [2023-04-01 03:05:01,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:05:01,631 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-04-01 03:05:01,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:05:01,631 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-04-01 03:05:01,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 03:05:01,633 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:05:01,633 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:05:01,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 03:05:01,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 03:05:01,837 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:05:01,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:05:01,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1521072446, now seen corresponding path program 12 times [2023-04-01 03:05:01,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:05:01,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608858022] [2023-04-01 03:05:01,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:05:01,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:05:01,866 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:05:01,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1871446244] [2023-04-01 03:05:01,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 03:05:01,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:05:01,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:05:01,868 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:05:01,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 03:05:01,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 03:05:01,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:05:01,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 03:05:01,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:05:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:02,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:05:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:02,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:05:02,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608858022] [2023-04-01 03:05:02,163 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:05:02,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871446244] [2023-04-01 03:05:02,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871446244] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:05:02,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1995788435] [2023-04-01 03:05:02,165 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:05:02,165 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:05:02,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:05:02,166 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:05:02,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:05:02,194 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:05:02,325 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-04-01 03:05:02,339 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:05:02,343 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:05:02,349 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:05:02,859 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3146#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_12| Int)) (and (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_12|)) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_12|) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_12|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_12|) (not (= (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_12|) 0) ~N~0)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#sum~0.base_BEFORE_CALL_12|)))) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:05:02,859 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:05:02,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:05:02,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-04-01 03:05:02,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248226043] [2023-04-01 03:05:02,859 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:05:02,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 03:05:02,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:05:02,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 03:05:02,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2023-04-01 03:05:02,862 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:05:03,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:05:03,029 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2023-04-01 03:05:03,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 03:05:03,030 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (4), 2 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 25 [2023-04-01 03:05:03,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:05:03,033 INFO L225 Difference]: With dead ends: 32 [2023-04-01 03:05:03,033 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 03:05:03,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=195, Invalid=1211, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 03:05:03,036 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:05:03,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 85 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:05:03,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 03:05:03,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-04-01 03:05:03,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:05:03,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2023-04-01 03:05:03,056 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 25 [2023-04-01 03:05:03,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:05:03,057 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2023-04-01 03:05:03,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:05:03,057 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2023-04-01 03:05:03,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 03:05:03,058 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:05:03,058 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:05:03,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 03:05:03,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 03:05:03,268 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:05:03,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:05:03,269 INFO L85 PathProgramCache]: Analyzing trace with hash -34743546, now seen corresponding path program 13 times [2023-04-01 03:05:03,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:05:03,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217255945] [2023-04-01 03:05:03,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:05:03,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:05:03,284 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:05:03,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606483498] [2023-04-01 03:05:03,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 03:05:03,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:05:03,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:05:03,297 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:05:03,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 03:05:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:05:03,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 88 conjunts are in the unsatisfiable core [2023-04-01 03:05:03,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:05:03,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 03:05:03,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 03:05:03,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 03:05:03,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 03:05:03,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-04-01 03:05:03,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 48 [2023-04-01 03:05:03,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 58 [2023-04-01 03:05:03,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2023-04-01 03:05:03,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2023-04-01 03:05:03,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2023-04-01 03:05:04,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2023-04-01 03:05:04,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2023-04-01 03:05:04,240 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:04,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:05:04,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-04-01 03:05:04,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-04-01 03:05:04,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-04-01 03:05:04,452 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:04,541 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:04,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2023-04-01 03:05:04,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-04-01 03:05:04,555 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:04,719 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:04,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2023-04-01 03:05:04,726 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:04,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2023-04-01 03:05:04,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-04-01 03:05:04,735 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:09,065 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 03:05:09,089 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:09,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:05:09,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217255945] [2023-04-01 03:05:09,090 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:05:09,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606483498] [2023-04-01 03:05:09,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606483498] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:05:09,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1173668381] [2023-04-01 03:05:09,091 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:05:09,091 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:05:09,091 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:05:09,092 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:05:09,092 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:05:09,118 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:05:09,240 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-04-01 03:05:09,258 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:05:09,262 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:05:09,269 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:05:10,857 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3460#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_13| Int)) (and (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_13|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#sum~0.base_BEFORE_CALL_13|)) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_13|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_13|) (not (= ~N~0 (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_13|) 0))) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_13|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:05:10,858 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:05:10,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:05:10,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2023-04-01 03:05:10,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011616330] [2023-04-01 03:05:10,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:05:10,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-04-01 03:05:10,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:05:10,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-04-01 03:05:10,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2085, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 03:05:10,873 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 34 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)