/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/eqn2f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:00:49,995 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:00:49,997 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:00:50,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:00:50,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:00:50,036 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:00:50,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:00:50,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:00:50,045 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:00:50,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:00:50,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:00:50,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:00:50,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:00:50,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:00:50,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:00:50,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:00:50,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:00:50,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:00:50,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:00:50,064 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:00:50,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:00:50,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:00:50,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:00:50,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:00:50,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 03:00:50,070 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 03:00:50,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 03:00:50,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 03:00:50,071 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 03:00:50,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 03:00:50,072 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:00:50,073 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:00:50,073 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:00:50,074 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:00:50,074 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:00:50,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:00:50,075 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:00:50,075 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:00:50,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:00:50,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:00:50,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:00:50,078 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 03:00:50,099 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:00:50,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:00:50,099 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:00:50,099 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:00:50,100 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:00:50,100 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:00:50,100 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:00:50,100 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:00:50,100 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:00:50,101 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:00:50,101 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:00:50,101 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:00:50,101 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:00:50,101 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:00:50,101 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:00:50,101 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:00:50,101 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:00:50,102 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:00:50,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:00:50,102 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:00:50,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:00:50,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:00:50,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:00:50,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:00:50,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:00:50,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:00:50,103 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:00:50,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:00:50,103 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:00:50,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:00:50,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:00:50,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:00:50,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:00:50,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:00:50,104 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:00:50,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:00:50,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:00:50,104 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:00:50,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:00:50,104 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:00:50,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:00:50,105 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:00:50,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:00:50,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:00:50,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:00:50,319 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:00:50,320 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:00:50,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn2f.c [2023-04-01 03:00:51,521 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:00:51,673 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:00:51,673 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn2f.c [2023-04-01 03:00:51,678 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e49fe39f/5c80a0f4c5014464b7054e54f37e9596/FLAGc6ff787fa [2023-04-01 03:00:51,689 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e49fe39f/5c80a0f4c5014464b7054e54f37e9596 [2023-04-01 03:00:51,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:00:51,692 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:00:51,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:00:51,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:00:51,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:00:51,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:00:51" (1/1) ... [2023-04-01 03:00:51,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d9a1645 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:51, skipping insertion in model container [2023-04-01 03:00:51,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:00:51" (1/1) ... [2023-04-01 03:00:51,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:00:51,714 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:00:51,832 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/eqn2f.c[588,601] [2023-04-01 03:00:51,847 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:00:51,855 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:00:51,865 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/eqn2f.c[588,601] [2023-04-01 03:00:51,871 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:00:51,882 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:00:51,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:51 WrapperNode [2023-04-01 03:00:51,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:00:51,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:00:51,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:00:51,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:00:51,893 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:51" (1/1) ... [2023-04-01 03:00:51,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:51" (1/1) ... [2023-04-01 03:00:51,905 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:51" (1/1) ... [2023-04-01 03:00:51,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:51" (1/1) ... [2023-04-01 03:00:51,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:51" (1/1) ... [2023-04-01 03:00:51,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:51" (1/1) ... [2023-04-01 03:00:51,922 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:51" (1/1) ... [2023-04-01 03:00:51,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:51" (1/1) ... [2023-04-01 03:00:51,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:00:51,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:00:51,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:00:51,925 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:00:51,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:51" (1/1) ... [2023-04-01 03:00:51,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:00:51,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:00:51,952 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 03:00:51,968 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 03:00:51,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:00:51,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:00:51,998 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:00:51,998 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 03:00:51,998 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 03:00:51,999 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:00:51,999 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:00:51,999 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:00:51,999 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:00:51,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:00:51,999 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 03:00:51,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 03:00:51,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:00:52,000 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 03:00:52,000 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:00:52,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 03:00:52,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:00:52,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:00:52,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:00:52,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:00:52,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:00:52,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:00:52,100 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:00:52,103 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:00:52,329 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:00:52,361 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:00:52,362 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 03:00:52,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:00:52 BoogieIcfgContainer [2023-04-01 03:00:52,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:00:52,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:00:52,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:00:52,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:00:52,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:00:51" (1/3) ... [2023-04-01 03:00:52,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4182c02b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:00:52, skipping insertion in model container [2023-04-01 03:00:52,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:51" (2/3) ... [2023-04-01 03:00:52,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4182c02b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:00:52, skipping insertion in model container [2023-04-01 03:00:52,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:00:52" (3/3) ... [2023-04-01 03:00:52,378 INFO L112 eAbstractionObserver]: Analyzing ICFG eqn2f.c [2023-04-01 03:00:52,407 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:00:52,407 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:00:52,447 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:00:52,453 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;@3e7aa8b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:00:52,453 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:00:52,457 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 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 03:00:52,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 03:00:52,462 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:00:52,463 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:00:52,463 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:00:52,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:00:52,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1001205354, now seen corresponding path program 1 times [2023-04-01 03:00:52,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:00:52,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192319051] [2023-04-01 03:00:52,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:52,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:00:52,579 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:00:52,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786682252] [2023-04-01 03:00:52,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:52,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:52,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:00:52,583 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 03:00:52,606 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 03:00:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:00:52,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-01 03:00:52,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:00:52,835 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-04-01 03:00:52,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-04-01 03:00:52,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-04-01 03:00:52,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-04-01 03:00:52,961 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-04-01 03:00:53,093 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 03:00:53,093 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:00:53,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:00:53,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192319051] [2023-04-01 03:00:53,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:00:53,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786682252] [2023-04-01 03:00:53,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786682252] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:00:53,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:00:53,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 03:00:53,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157794698] [2023-04-01 03:00:53,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:00:53,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 03:00:53,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:00:53,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 03:00:53,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-01 03:00:53,132 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 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 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:00:53,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:00:53,270 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2023-04-01 03:00:53,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:00:53,273 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-04-01 03:00:53,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:00:53,289 INFO L225 Difference]: With dead ends: 54 [2023-04-01 03:00:53,289 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 03:00:53,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-01 03:00:53,296 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:00:53,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 96 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:00:53,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 03:00:53,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2023-04-01 03:00:53,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 03:00:53,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-04-01 03:00:53,335 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2023-04-01 03:00:53,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:00:53,336 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-04-01 03:00:53,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:00:53,338 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-04-01 03:00:53,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 03:00:53,338 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:00:53,338 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 03:00:53,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 03:00:53,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 03:00:53,545 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:00:53,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:00:53,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1191020082, now seen corresponding path program 1 times [2023-04-01 03:00:53,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:00:53,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25054338] [2023-04-01 03:00:53,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:53,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:00:53,589 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:00:53,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [236823186] [2023-04-01 03:00:53,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:53,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:53,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:00:53,599 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 03:00:53,601 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 03:00:53,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:00:53,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:00:53,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:00:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:00:53,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:00:53,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:00:53,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:00:53,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25054338] [2023-04-01 03:00:53,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:00:53,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236823186] [2023-04-01 03:00:53,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236823186] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:00:53,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1881989345] [2023-04-01 03:00:53,775 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:00:53,775 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:00:53,778 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:00:53,782 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:00:53,782 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:00:53,889 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:00:54,117 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-04-01 03:00:54,159 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:00:54,169 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:00:54,184 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:00:54,881 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '319#(and (exists ((v_main_~b~0.base_BEFORE_CALL_1 Int)) (and (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_1) 0) 1)) (<= (+ v_main_~b~0.base_BEFORE_CALL_1 1) |#StackHeapBarrier|))) (<= 2 (+ ~N~0 |#StackHeapBarrier|)) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~N~0 1) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:00:54,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:00:54,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:00:54,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2023-04-01 03:00:54,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451084264] [2023-04-01 03:00:54,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:00:54,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 03:00:54,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:00:54,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 03:00:54,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2023-04-01 03:00:54,884 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 03:00:54,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:00:54,985 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2023-04-01 03:00:54,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 03:00:54,986 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 18 [2023-04-01 03:00:54,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:00:54,990 INFO L225 Difference]: With dead ends: 51 [2023-04-01 03:00:54,990 INFO L226 Difference]: Without dead ends: 42 [2023-04-01 03:00:54,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2023-04-01 03:00:54,993 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:00:54,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 71 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:00:54,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-04-01 03:00:54,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2023-04-01 03:00:54,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 03:00:54,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-04-01 03:00:54,999 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2023-04-01 03:00:55,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:00:55,000 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-04-01 03:00:55,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 03:00:55,000 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-04-01 03:00:55,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 03:00:55,001 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:00:55,001 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 03:00:55,009 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 03:00:55,206 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,SelfDestructingSolverStorable1 [2023-04-01 03:00:55,207 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:00:55,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:00:55,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1062231974, now seen corresponding path program 1 times [2023-04-01 03:00:55,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:00:55,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190772174] [2023-04-01 03:00:55,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:55,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:00:55,243 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:00:55,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564435548] [2023-04-01 03:00:55,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:55,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:55,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:00:55,249 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 03:00:55,250 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 03:00:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:00:55,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:00:55,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:00:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:00:55,329 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:00:55,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:00:55,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190772174] [2023-04-01 03:00:55,329 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:00:55,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564435548] [2023-04-01 03:00:55,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564435548] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:00:55,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:00:55,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 03:00:55,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949605734] [2023-04-01 03:00:55,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:00:55,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 03:00:55,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:00:55,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 03:00:55,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 03:00:55,332 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 03:00:55,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:00:55,366 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2023-04-01 03:00:55,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 03:00:55,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 18 [2023-04-01 03:00:55,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:00:55,368 INFO L225 Difference]: With dead ends: 43 [2023-04-01 03:00:55,368 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 03:00:55,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:00:55,374 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 03:00:55,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 38 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 03:00:55,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 03:00:55,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2023-04-01 03:00:55,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 03:00:55,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-04-01 03:00:55,388 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 18 [2023-04-01 03:00:55,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:00:55,388 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-04-01 03:00:55,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 03:00:55,389 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-04-01 03:00:55,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 03:00:55,390 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:00:55,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:00:55,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 03:00:55,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:55,598 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:00:55,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:00:55,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1643446050, now seen corresponding path program 1 times [2023-04-01 03:00:55,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:00:55,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085785621] [2023-04-01 03:00:55,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:55,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:00:55,619 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:00:55,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634890643] [2023-04-01 03:00:55,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:55,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:55,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:00:55,620 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 03:00:55,645 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 03:00:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:00:55,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-01 03:00:55,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:00:55,726 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 03:00:55,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:00:55,736 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 14 treesize of output 14 [2023-04-01 03:00:55,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-04-01 03:00:55,760 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 14 treesize of output 16 [2023-04-01 03:00:55,794 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 03:00:55,839 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 03:00:55,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:00:56,003 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 03:00:56,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:00:56,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085785621] [2023-04-01 03:00:56,004 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:00:56,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634890643] [2023-04-01 03:00:56,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634890643] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:00:56,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [178481822] [2023-04-01 03:00:56,007 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:00:56,008 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:00:56,008 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:00:56,008 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:00:56,008 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:00:56,079 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:00:56,251 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2023-04-01 03:00:56,267 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:00:56,272 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:00:56,283 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:00:56,955 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '762#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((v_main_~b~0.base_BEFORE_CALL_2 Int)) (and (<= (+ v_main_~b~0.base_BEFORE_CALL_2 1) |#StackHeapBarrier|) (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_2) 0) 1)))) (= |#NULL.base| 0))' at error location [2023-04-01 03:00:56,955 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:00:56,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:00:56,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2023-04-01 03:00:56,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411443895] [2023-04-01 03:00:56,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:00:56,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 03:00:56,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:00:56,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 03:00:56,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=898, Unknown=4, NotChecked=0, Total=992 [2023-04-01 03:00:56,957 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 17 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:00:57,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:00:57,205 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2023-04-01 03:00:57,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 03:00:57,205 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 19 [2023-04-01 03:00:57,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:00:57,206 INFO L225 Difference]: With dead ends: 51 [2023-04-01 03:00:57,206 INFO L226 Difference]: Without dead ends: 49 [2023-04-01 03:00:57,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=131, Invalid=1197, Unknown=4, NotChecked=0, Total=1332 [2023-04-01 03:00:57,208 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:00:57,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 114 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:00:57,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-04-01 03:00:57,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2023-04-01 03:00:57,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 03:00:57,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2023-04-01 03:00:57,215 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 19 [2023-04-01 03:00:57,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:00:57,215 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2023-04-01 03:00:57,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:00:57,215 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2023-04-01 03:00:57,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 03:00:57,216 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:00:57,216 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:00:57,224 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 03:00:57,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:57,422 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:00:57,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:00:57,423 INFO L85 PathProgramCache]: Analyzing trace with hash -230270114, now seen corresponding path program 2 times [2023-04-01 03:00:57,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:00:57,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448381203] [2023-04-01 03:00:57,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:57,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:00:57,445 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:00:57,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541585930] [2023-04-01 03:00:57,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:00:57,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:57,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:00:57,451 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 03:00:57,452 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 03:00:57,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 03:00:57,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:00:57,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 03:00:57,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:00:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:00:57,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:00:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:00:57,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:00:57,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448381203] [2023-04-01 03:00:57,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:00:57,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541585930] [2023-04-01 03:00:57,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541585930] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:00:57,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [928040704] [2023-04-01 03:00:57,598 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:00:57,599 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:00:57,599 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:00:57,599 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:00:57,599 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:00:57,660 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:00:57,779 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2023-04-01 03:00:57,791 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:00:57,795 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:00:57,803 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:00:58,370 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1049#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~b~0.base_BEFORE_CALL_3 Int)) (and (<= (+ v_main_~b~0.base_BEFORE_CALL_3 1) |#StackHeapBarrier|) (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_3) 0) 1)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:00:58,370 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:00:58,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:00:58,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-04-01 03:00:58,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013101864] [2023-04-01 03:00:58,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:00:58,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 03:00:58,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:00:58,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 03:00:58,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-04-01 03:00:58,372 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 03:00:58,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:00:58,488 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2023-04-01 03:00:58,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 03:00:58,488 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 03:00:58,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:00:58,489 INFO L225 Difference]: With dead ends: 62 [2023-04-01 03:00:58,489 INFO L226 Difference]: Without dead ends: 40 [2023-04-01 03:00:58,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2023-04-01 03:00:58,490 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 03:00:58,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 38 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 03:00:58,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-01 03:00:58,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2023-04-01 03:00:58,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 03:00:58,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2023-04-01 03:00:58,497 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 21 [2023-04-01 03:00:58,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:00:58,498 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2023-04-01 03:00:58,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 03:00:58,498 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2023-04-01 03:00:58,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 03:00:58,498 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:00:58,499 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:00:58,507 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 03:00:58,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:58,705 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:00:58,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:00:58,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1433039066, now seen corresponding path program 3 times [2023-04-01 03:00:58,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:00:58,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140655431] [2023-04-01 03:00:58,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:58,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:00:58,732 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:00:58,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705754324] [2023-04-01 03:00:58,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 03:00:58,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:58,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:00:58,737 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 03:00:58,745 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 03:00:58,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 03:00:58,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:00:58,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 03:00:58,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:00:58,876 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 03:00:58,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:00:58,923 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 03:00:58,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:00:58,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140655431] [2023-04-01 03:00:58,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:00:58,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705754324] [2023-04-01 03:00:58,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705754324] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:00:58,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1671351659] [2023-04-01 03:00:58,926 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:00:58,926 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:00:58,926 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:00:58,926 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:00:58,926 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:00:58,958 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:00:59,063 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2023-04-01 03:00:59,075 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:00:59,079 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:00:59,088 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:00:59,725 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1368#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (exists ((v_main_~b~0.base_BEFORE_CALL_4 Int)) (and (<= (+ v_main_~b~0.base_BEFORE_CALL_4 1) |#StackHeapBarrier|) (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_4) 0) 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 03:00:59,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:00:59,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:00:59,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-04-01 03:00:59,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707918373] [2023-04-01 03:00:59,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:00:59,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 03:00:59,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:00:59,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 03:00:59,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2023-04-01 03:00:59,727 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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 03:00:59,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:00:59,904 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2023-04-01 03:00:59,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 03:00:59,904 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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 22 [2023-04-01 03:00:59,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:00:59,905 INFO L225 Difference]: With dead ends: 64 [2023-04-01 03:00:59,905 INFO L226 Difference]: Without dead ends: 52 [2023-04-01 03:00:59,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 03:00:59,906 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:00:59,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 52 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:00:59,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-01 03:00:59,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2023-04-01 03:00:59,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 33 states have internal predecessors, (39), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 03:00:59,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2023-04-01 03:00:59,915 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 22 [2023-04-01 03:00:59,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:00:59,915 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2023-04-01 03:00:59,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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 03:00:59,915 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2023-04-01 03:00:59,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 03:00:59,916 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:00:59,916 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:00:59,925 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 03:01:00,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:00,117 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:01:00,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:01:00,118 INFO L85 PathProgramCache]: Analyzing trace with hash -64170914, now seen corresponding path program 4 times [2023-04-01 03:01:00,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:01:00,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165973708] [2023-04-01 03:01:00,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:01:00,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:01:00,145 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:01:00,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203270962] [2023-04-01 03:01:00,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 03:01:00,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:00,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:01:00,153 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 03:01:00,156 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 03:01:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:01:00,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 38 conjunts are in the unsatisfiable core [2023-04-01 03:01:00,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:01:00,258 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 03:01:00,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:01:00,263 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 14 treesize of output 14 [2023-04-01 03:01:00,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-04-01 03:01:00,276 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 14 treesize of output 16 [2023-04-01 03:01:00,284 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 14 treesize of output 16 [2023-04-01 03:01:00,292 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 14 treesize of output 16 [2023-04-01 03:01:00,317 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 03:01:00,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:01:00,334 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 21 treesize of output 20 [2023-04-01 03:01:00,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:01:00,353 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 21 treesize of output 20 [2023-04-01 03:01:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 03:01:00,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:01:01,952 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_102 Int) (v_main_~i~0_103 Int) (v_ArrVal_255 Int) (v_ArrVal_254 Int) (v_ArrVal_252 Int)) (or (< v_main_~i~0_102 (+ v_main_~i~0_103 1)) (= (select (store (store (store (select |c_#memory_int| c_main_~b~0.base) (+ (* c_main_~i~0 8) c_main_~b~0.offset) v_ArrVal_252) (+ (* 8 v_main_~i~0_103) c_main_~b~0.offset) v_ArrVal_254) (+ (* 8 v_main_~i~0_102) c_main_~b~0.offset) v_ArrVal_255) c_main_~b~0.offset) 1) (< v_main_~i~0_103 (+ c_main_~i~0 1)))) is different from false [2023-04-01 03:01:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2023-04-01 03:01:02,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:01:02,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165973708] [2023-04-01 03:01:02,095 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:01:02,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203270962] [2023-04-01 03:01:02,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203270962] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:01:02,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1856789773] [2023-04-01 03:01:02,097 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:01:02,097 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:01:02,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:01:02,097 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:01:02,098 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:01:02,144 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:01:02,236 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2023-04-01 03:01:02,246 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:01:02,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:01:02,254 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:01:02,923 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1731#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~b~0.base_BEFORE_CALL_5 Int)) (and (<= (+ v_main_~b~0.base_BEFORE_CALL_5 1) |#StackHeapBarrier|) (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_5) 0) 1)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:01:02,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:01:02,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:01:02,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2023-04-01 03:01:02,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130536845] [2023-04-01 03:01:02,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:01:02,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 03:01:02,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:01:02,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 03:01:02,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1080, Unknown=4, NotChecked=66, Total=1260 [2023-04-01 03:01:02,925 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:01:03,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:01:03,241 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2023-04-01 03:01:03,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 03:01:03,242 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2023-04-01 03:01:03,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:01:03,245 INFO L225 Difference]: With dead ends: 58 [2023-04-01 03:01:03,245 INFO L226 Difference]: Without dead ends: 56 [2023-04-01 03:01:03,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=164, Invalid=1476, Unknown=4, NotChecked=78, Total=1722 [2023-04-01 03:01:03,247 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 31 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 03:01:03,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 148 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 319 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2023-04-01 03:01:03,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-04-01 03:01:03,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2023-04-01 03:01:03,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 38 states have internal predecessors, (43), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 03:01:03,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2023-04-01 03:01:03,270 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 23 [2023-04-01 03:01:03,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:01:03,271 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2023-04-01 03:01:03,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:01:03,271 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2023-04-01 03:01:03,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 03:01:03,275 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:01:03,275 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:01:03,282 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 03:01:03,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:03,481 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:01:03,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:01:03,481 INFO L85 PathProgramCache]: Analyzing trace with hash -409251036, now seen corresponding path program 1 times [2023-04-01 03:01:03,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:01:03,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317633355] [2023-04-01 03:01:03,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:01:03,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:01:03,505 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:01:03,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503632558] [2023-04-01 03:01:03,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:01:03,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:03,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:01:03,515 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 03:01:03,516 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 03:01:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 03:01:03,581 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-01 03:01:03,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 03:01:03,623 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-01 03:01:03,623 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-01 03:01:03,624 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 03:01:03,633 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 03:01:03,825 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,SelfDestructingSolverStorable7 [2023-04-01 03:01:03,828 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1] [2023-04-01 03:01:03,831 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 03:01:03,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 03:01:03 BoogieIcfgContainer [2023-04-01 03:01:03,849 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 03:01:03,850 INFO L158 Benchmark]: Toolchain (without parser) took 12157.73ms. Allocated memory was 291.5MB in the beginning and 350.2MB in the end (delta: 58.7MB). Free memory was 241.2MB in the beginning and 309.5MB in the end (delta: -68.3MB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 03:01:03,850 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 169.9MB. Free memory was 117.6MB in the beginning and 117.4MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 03:01:03,850 INFO L158 Benchmark]: CACSL2BoogieTranslator took 189.68ms. Allocated memory is still 291.5MB. Free memory was 240.7MB in the beginning and 230.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-01 03:01:03,850 INFO L158 Benchmark]: Boogie Preprocessor took 40.79ms. Allocated memory is still 291.5MB. Free memory was 230.1MB in the beginning and 228.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-01 03:01:03,851 INFO L158 Benchmark]: RCFGBuilder took 439.16ms. Allocated memory is still 291.5MB. Free memory was 228.6MB in the beginning and 213.4MB in the end (delta: 15.2MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2023-04-01 03:01:03,851 INFO L158 Benchmark]: TraceAbstraction took 11476.69ms. Allocated memory was 291.5MB in the beginning and 350.2MB in the end (delta: 58.7MB). Free memory was 212.9MB in the beginning and 309.5MB in the end (delta: -96.6MB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 03:01:03,852 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 169.9MB. Free memory was 117.6MB in the beginning and 117.4MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 189.68ms. Allocated memory is still 291.5MB. Free memory was 240.7MB in the beginning and 230.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 40.79ms. Allocated memory is still 291.5MB. Free memory was 230.1MB in the beginning and 228.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 439.16ms. Allocated memory is still 291.5MB. Free memory was 228.6MB in the beginning and 213.4MB in the end (delta: 15.2MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * TraceAbstraction took 11476.69ms. Allocated memory was 291.5MB in the beginning and 350.2MB in the end (delta: 58.7MB). Free memory was 212.9MB in the beginning and 309.5MB in the end (delta: -96.6MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) VAL [N=2, \old(N)=0] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [N=2, \old(N)=0, \old(cond)=1] [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [N=2, \old(N)=0] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 8 [L32] b[0] = 1 [L34] i=1 VAL [N=2, \old(N)=0, a={-2:0}, b={-1:0}, i=1] [L34] COND TRUE i