/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 IntervalDomain -i ../sv-benchmarks/c/array-examples/standard_compareModified_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 20:34:47,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 20:34:47,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 20:34:47,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 20:34:47,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 20:34:47,074 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 20:34:47,077 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 20:34:47,079 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 20:34:47,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 20:34:47,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 20:34:47,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 20:34:47,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 20:34:47,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 20:34:47,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 20:34:47,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 20:34:47,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 20:34:47,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 20:34:47,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 20:34:47,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 20:34:47,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 20:34:47,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 20:34:47,098 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 20:34:47,099 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 20:34:47,100 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 20:34:47,106 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 20:34:47,106 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 20:34:47,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 20:34:47,107 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 20:34:47,107 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 20:34:47,108 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 20:34:47,108 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 20:34:47,108 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 20:34:47,109 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 20:34:47,110 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 20:34:47,110 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 20:34:47,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 20:34:47,111 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 20:34:47,111 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 20:34:47,111 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 20:34:47,112 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 20:34:47,112 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 20:34:47,113 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 [2023-03-31 20:34:47,140 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 20:34:47,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 20:34:47,141 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 20:34:47,141 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 20:34:47,141 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 20:34:47,141 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 20:34:47,141 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 20:34:47,142 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 20:34:47,142 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 20:34:47,142 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 20:34:47,142 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 20:34:47,142 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 20:34:47,143 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 20:34:47,143 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 20:34:47,143 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 20:34:47,143 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 20:34:47,143 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 20:34:47,143 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 20:34:47,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 20:34:47,144 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 20:34:47,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 20:34:47,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 20:34:47,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 20:34:47,144 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 20:34:47,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 20:34:47,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 20:34:47,145 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 20:34:47,145 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 20:34:47,145 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 20:34:47,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 20:34:47,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 20:34:47,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 20:34:47,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:34:47,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 20:34:47,146 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 20:34:47,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 20:34:47,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 20:34:47,146 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 20:34:47,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 20:34:47,146 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 20:34:47,146 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 20:34:47,146 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 20:34:47,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 20:34:47,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 20:34:47,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 20:34:47,353 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 20:34:47,353 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 20:34:47,354 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_compareModified_ground.i [2023-03-31 20:34:48,372 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 20:34:48,525 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 20:34:48,526 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_compareModified_ground.i [2023-03-31 20:34:48,529 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0090e7bdf/51fcd4b584a344cd99852372b5c1816f/FLAGcd837b394 [2023-03-31 20:34:48,539 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0090e7bdf/51fcd4b584a344cd99852372b5c1816f [2023-03-31 20:34:48,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 20:34:48,542 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 20:34:48,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 20:34:48,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 20:34:48,545 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 20:34:48,546 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:34:48" (1/1) ... [2023-03-31 20:34:48,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3469ee38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:48, skipping insertion in model container [2023-03-31 20:34:48,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:34:48" (1/1) ... [2023-03-31 20:34:48,551 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 20:34:48,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 20:34:48,691 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-examples/standard_compareModified_ground.i[824,837] [2023-03-31 20:34:48,708 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:34:48,715 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 20:34:48,726 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-examples/standard_compareModified_ground.i[824,837] [2023-03-31 20:34:48,741 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:34:48,751 INFO L208 MainTranslator]: Completed translation [2023-03-31 20:34:48,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:48 WrapperNode [2023-03-31 20:34:48,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 20:34:48,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 20:34:48,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 20:34:48,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 20:34:48,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:48" (1/1) ... [2023-03-31 20:34:48,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:48" (1/1) ... [2023-03-31 20:34:48,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:48" (1/1) ... [2023-03-31 20:34:48,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:48" (1/1) ... [2023-03-31 20:34:48,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:48" (1/1) ... [2023-03-31 20:34:48,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:48" (1/1) ... [2023-03-31 20:34:48,790 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:48" (1/1) ... [2023-03-31 20:34:48,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:48" (1/1) ... [2023-03-31 20:34:48,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 20:34:48,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 20:34:48,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 20:34:48,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 20:34:48,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:48" (1/1) ... [2023-03-31 20:34:48,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:34:48,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:34:48,822 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) [2023-03-31 20:34:48,849 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 [2023-03-31 20:34:48,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 20:34:48,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 20:34:48,865 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 20:34:48,866 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 20:34:48,866 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 20:34:48,866 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 20:34:48,866 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 20:34:48,866 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 20:34:48,866 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 20:34:48,866 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 20:34:48,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 20:34:48,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 20:34:48,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 20:34:48,867 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 20:34:48,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 20:34:48,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 20:34:48,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 20:34:48,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 20:34:48,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 20:34:48,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 20:34:48,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 20:34:48,937 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 20:34:48,938 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 20:34:49,093 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 20:34:49,131 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 20:34:49,131 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-03-31 20:34:49,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:34:49 BoogieIcfgContainer [2023-03-31 20:34:49,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 20:34:49,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 20:34:49,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 20:34:49,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 20:34:49,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 08:34:48" (1/3) ... [2023-03-31 20:34:49,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e9ba956 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:34:49, skipping insertion in model container [2023-03-31 20:34:49,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:48" (2/3) ... [2023-03-31 20:34:49,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e9ba956 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:34:49, skipping insertion in model container [2023-03-31 20:34:49,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:34:49" (3/3) ... [2023-03-31 20:34:49,140 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_compareModified_ground.i [2023-03-31 20:34:49,152 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 20:34:49,152 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 20:34:49,189 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 20:34:49,193 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;@6b799712, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 20:34:49,194 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 20:34:49,196 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:34:49,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-03-31 20:34:49,201 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:34:49,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:34:49,202 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:34:49,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:34:49,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1932088670, now seen corresponding path program 1 times [2023-03-31 20:34:49,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:34:49,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344794277] [2023-03-31 20:34:49,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:49,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:34:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:34:49,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:34:49,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344794277] [2023-03-31 20:34:49,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344794277] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:34:49,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:34:49,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 20:34:49,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017493218] [2023-03-31 20:34:49,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:34:49,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 20:34:49,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:34:49,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 20:34:49,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:34:49,433 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:49,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:34:49,488 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2023-03-31 20:34:49,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 20:34:49,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-03-31 20:34:49,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:34:49,495 INFO L225 Difference]: With dead ends: 43 [2023-03-31 20:34:49,495 INFO L226 Difference]: Without dead ends: 22 [2023-03-31 20:34:49,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:34:49,500 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:34:49,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:34:49,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-03-31 20:34:49,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-03-31 20:34:49,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:34:49,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-03-31 20:34:49,531 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 13 [2023-03-31 20:34:49,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:34:49,531 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-03-31 20:34:49,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:49,532 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-03-31 20:34:49,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-03-31 20:34:49,533 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:34:49,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:34:49,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 20:34:49,533 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:34:49,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:34:49,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1165184082, now seen corresponding path program 1 times [2023-03-31 20:34:49,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:34:49,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486362561] [2023-03-31 20:34:49,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:49,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:34:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:49,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 20:34:49,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:34:49,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486362561] [2023-03-31 20:34:49,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486362561] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:34:49,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:34:49,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 20:34:49,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515431617] [2023-03-31 20:34:49,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:34:49,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 20:34:49,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:34:49,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 20:34:49,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:34:49,644 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:49,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:34:49,671 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2023-03-31 20:34:49,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 20:34:49,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-03-31 20:34:49,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:34:49,674 INFO L225 Difference]: With dead ends: 37 [2023-03-31 20:34:49,674 INFO L226 Difference]: Without dead ends: 23 [2023-03-31 20:34:49,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:34:49,677 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:34:49,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:34:49,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-03-31 20:34:49,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-03-31 20:34:49,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:34:49,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-03-31 20:34:49,681 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 14 [2023-03-31 20:34:49,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:34:49,681 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-03-31 20:34:49,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:49,682 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-03-31 20:34:49,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-03-31 20:34:49,682 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:34:49,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:34:49,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 20:34:49,682 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:34:49,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:34:49,683 INFO L85 PathProgramCache]: Analyzing trace with hash 838221224, now seen corresponding path program 1 times [2023-03-31 20:34:49,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:34:49,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165633086] [2023-03-31 20:34:49,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:49,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:34:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 20:34:49,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:34:49,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165633086] [2023-03-31 20:34:49,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165633086] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:34:49,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011404056] [2023-03-31 20:34:49,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:49,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:49,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:34:49,749 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) [2023-03-31 20:34:49,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 20:34:49,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:49,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 20:34:49,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:34:49,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 20:34:49,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:34:49,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 20:34:49,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011404056] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:34:49,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [956188259] [2023-03-31 20:34:49,897 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-03-31 20:34:49,897 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:34:49,899 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:34:49,902 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:34:49,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:34:49,972 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:34:50,126 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-03-31 20:34:50,156 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:34:50,160 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:34:50,475 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '313#(and (exists ((|v_main_~#b~0.base_BEFORE_CALL_1| Int) (|v_main_~#a~0.base_BEFORE_CALL_1| Int)) (and (<= 0 |v_main_~#a~0.base_BEFORE_CALL_1|) (<= 0 |v_main_~#b~0.base_BEFORE_CALL_1|) (not (= (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_1|) 0) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) 0))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:34:50,476 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:34:50,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:34:50,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-03-31 20:34:50,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004124987] [2023-03-31 20:34:50,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:34:50,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 20:34:50,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:34:50,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 20:34:50,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-03-31 20:34:50,480 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:50,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:34:50,509 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2023-03-31 20:34:50,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 20:34:50,509 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-03-31 20:34:50,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:34:50,511 INFO L225 Difference]: With dead ends: 42 [2023-03-31 20:34:50,511 INFO L226 Difference]: Without dead ends: 26 [2023-03-31 20:34:50,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-03-31 20:34:50,514 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:34:50,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:34:50,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-03-31 20:34:50,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-03-31 20:34:50,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:34:50,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-03-31 20:34:50,522 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 15 [2023-03-31 20:34:50,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:34:50,522 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-03-31 20:34:50,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:50,522 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-03-31 20:34:50,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-03-31 20:34:50,523 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:34:50,523 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:34:50,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 20:34:50,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:50,728 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:34:50,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:34:50,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1048363528, now seen corresponding path program 2 times [2023-03-31 20:34:50,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:34:50,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082559014] [2023-03-31 20:34:50,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:50,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:34:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 20:34:50,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:34:50,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082559014] [2023-03-31 20:34:50,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082559014] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:34:50,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137638725] [2023-03-31 20:34:50,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:34:50,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:50,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:34:50,792 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) [2023-03-31 20:34:50,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 20:34:50,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 20:34:50,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:34:50,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 20:34:50,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:34:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 20:34:50,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:34:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 20:34:50,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137638725] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:34:50,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [298604662] [2023-03-31 20:34:50,905 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-03-31 20:34:50,905 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:34:50,906 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:34:50,906 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:34:50,906 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:34:50,933 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:34:51,035 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-03-31 20:34:51,048 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:34:51,051 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:34:51,293 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '544#(and (exists ((|v_main_~#a~0.base_BEFORE_CALL_2| Int) (|v_main_~#b~0.base_BEFORE_CALL_2| Int)) (and (not (= (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_2|) 0) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_2|) 0))) (<= 0 |v_main_~#a~0.base_BEFORE_CALL_2|) (<= 0 |v_main_~#b~0.base_BEFORE_CALL_2|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:34:51,293 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:34:51,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:34:51,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-03-31 20:34:51,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758249600] [2023-03-31 20:34:51,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:34:51,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 20:34:51,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:34:51,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 20:34:51,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-03-31 20:34:51,298 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:51,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:34:51,330 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2023-03-31 20:34:51,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 20:34:51,331 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-03-31 20:34:51,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:34:51,332 INFO L225 Difference]: With dead ends: 43 [2023-03-31 20:34:51,332 INFO L226 Difference]: Without dead ends: 29 [2023-03-31 20:34:51,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-03-31 20:34:51,335 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:34:51,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 69 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:34:51,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-03-31 20:34:51,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-03-31 20:34:51,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:34:51,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2023-03-31 20:34:51,341 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 18 [2023-03-31 20:34:51,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:34:51,341 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2023-03-31 20:34:51,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:51,341 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2023-03-31 20:34:51,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 20:34:51,342 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:34:51,342 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:34:51,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 20:34:51,547 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,SelfDestructingSolverStorable3 [2023-03-31 20:34:51,547 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:34:51,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:34:51,548 INFO L85 PathProgramCache]: Analyzing trace with hash 924041182, now seen corresponding path program 3 times [2023-03-31 20:34:51,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:34:51,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107399794] [2023-03-31 20:34:51,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:51,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:34:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 20:34:51,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:34:51,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107399794] [2023-03-31 20:34:51,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107399794] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:34:51,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776561380] [2023-03-31 20:34:51,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:34:51,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:51,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:34:51,692 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) [2023-03-31 20:34:51,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 20:34:51,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:34:51,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:34:51,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 20:34:51,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:34:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 20:34:51,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:34:51,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 20:34:51,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776561380] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:34:51,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1600537413] [2023-03-31 20:34:51,821 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-03-31 20:34:51,821 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:34:51,821 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:34:51,821 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:34:51,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:34:51,836 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:34:51,897 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-03-31 20:34:51,911 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:34:51,914 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:34:52,161 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '807#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_3| Int) (|v_main_~#b~0.base_BEFORE_CALL_3| Int)) (and (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_3|) 0) (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_3|) 0))) (<= 0 |v_main_~#a~0.base_BEFORE_CALL_3|) (<= 0 |v_main_~#b~0.base_BEFORE_CALL_3|))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:34:52,161 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:34:52,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:34:52,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-03-31 20:34:52,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670763852] [2023-03-31 20:34:52,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:34:52,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-31 20:34:52,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:34:52,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-31 20:34:52,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2023-03-31 20:34:52,163 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:52,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:34:52,205 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2023-03-31 20:34:52,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 20:34:52,205 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-03-31 20:34:52,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:34:52,206 INFO L225 Difference]: With dead ends: 54 [2023-03-31 20:34:52,206 INFO L226 Difference]: Without dead ends: 35 [2023-03-31 20:34:52,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2023-03-31 20:34:52,207 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:34:52,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 69 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:34:52,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-03-31 20:34:52,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-03-31 20:34:52,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:34:52,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2023-03-31 20:34:52,215 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 21 [2023-03-31 20:34:52,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:34:52,216 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2023-03-31 20:34:52,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:52,216 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2023-03-31 20:34:52,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-31 20:34:52,217 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:34:52,217 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:34:52,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-03-31 20:34:52,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:52,422 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:34:52,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:34:52,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1495687714, now seen corresponding path program 4 times [2023-03-31 20:34:52,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:34:52,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166885518] [2023-03-31 20:34:52,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:52,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:34:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:52,619 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 20:34:52,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:34:52,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166885518] [2023-03-31 20:34:52,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166885518] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:34:52,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95253510] [2023-03-31 20:34:52,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:34:52,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:52,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:34:52,622 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) [2023-03-31 20:34:52,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 20:34:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:52,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 20:34:52,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:34:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 20:34:52,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:34:52,879 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 20:34:52,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95253510] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:34:52,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [797405705] [2023-03-31 20:34:52,881 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-03-31 20:34:52,882 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:34:52,882 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:34:52,882 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:34:52,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:34:52,898 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:34:52,949 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-03-31 20:34:52,958 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:34:52,960 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:34:53,222 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1152#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_4| Int) (|v_main_~#b~0.base_BEFORE_CALL_4| Int)) (and (<= 0 |v_main_~#a~0.base_BEFORE_CALL_4|) (<= 0 |v_main_~#b~0.base_BEFORE_CALL_4|) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_4|) 0) (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_4|) 0))))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:34:53,223 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:34:53,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:34:53,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-03-31 20:34:53,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997516650] [2023-03-31 20:34:53,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:34:53,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-03-31 20:34:53,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:34:53,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-03-31 20:34:53,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2023-03-31 20:34:53,225 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:53,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:34:53,265 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2023-03-31 20:34:53,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-03-31 20:34:53,266 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-03-31 20:34:53,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:34:53,266 INFO L225 Difference]: With dead ends: 66 [2023-03-31 20:34:53,267 INFO L226 Difference]: Without dead ends: 47 [2023-03-31 20:34:53,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2023-03-31 20:34:53,268 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:34:53,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 120 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:34:53,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-03-31 20:34:53,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-03-31 20:34:53,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:34:53,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2023-03-31 20:34:53,285 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 27 [2023-03-31 20:34:53,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:34:53,286 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2023-03-31 20:34:53,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:53,286 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2023-03-31 20:34:53,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-03-31 20:34:53,286 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:34:53,287 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:34:53,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 20:34:53,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:53,491 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:34:53,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:34:53,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1507206690, now seen corresponding path program 5 times [2023-03-31 20:34:53,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:34:53,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842222701] [2023-03-31 20:34:53,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:53,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:34:53,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 20:34:54,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:34:54,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842222701] [2023-03-31 20:34:54,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842222701] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:34:54,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356649379] [2023-03-31 20:34:54,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:34:54,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:54,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:34:54,069 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) [2023-03-31 20:34:54,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 20:34:54,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 20:34:54,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:34:54,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 20:34:54,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:34:54,264 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-03-31 20:34:54,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:34:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-03-31 20:34:54,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356649379] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:34:54,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [700368585] [2023-03-31 20:34:54,373 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-03-31 20:34:54,373 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:34:54,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:34:54,373 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:34:54,374 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:34:54,384 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:34:54,435 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-03-31 20:34:54,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:34:54,443 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:34:54,743 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1627#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_5| Int) (|v_main_~#b~0.base_BEFORE_CALL_5| Int)) (and (<= 0 |v_main_~#a~0.base_BEFORE_CALL_5|) (<= 0 |v_main_~#b~0.base_BEFORE_CALL_5|) (not (= (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_5|) 0) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_5|) 0))))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:34:54,744 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:34:54,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:34:54,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2023-03-31 20:34:54,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104399697] [2023-03-31 20:34:54,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:34:54,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-03-31 20:34:54,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:34:54,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-03-31 20:34:54,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=1744, Unknown=0, NotChecked=0, Total=2162 [2023-03-31 20:34:54,746 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:55,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:34:55,079 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2023-03-31 20:34:55,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-03-31 20:34:55,079 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2023-03-31 20:34:55,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:34:55,080 INFO L225 Difference]: With dead ends: 73 [2023-03-31 20:34:55,080 INFO L226 Difference]: Without dead ends: 54 [2023-03-31 20:34:55,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1223, Invalid=3607, Unknown=0, NotChecked=0, Total=4830 [2023-03-31 20:34:55,082 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:34:55,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 154 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:34:55,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-03-31 20:34:55,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-03-31 20:34:55,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:34:55,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2023-03-31 20:34:55,086 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 39 [2023-03-31 20:34:55,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:34:55,087 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2023-03-31 20:34:55,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:55,087 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2023-03-31 20:34:55,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-03-31 20:34:55,087 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:34:55,088 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:34:55,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 20:34:55,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:55,299 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:34:55,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:34:55,300 INFO L85 PathProgramCache]: Analyzing trace with hash 356901358, now seen corresponding path program 6 times [2023-03-31 20:34:55,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:34:55,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349552837] [2023-03-31 20:34:55,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:55,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:34:55,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-03-31 20:34:55,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:34:55,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349552837] [2023-03-31 20:34:55,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349552837] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:34:55,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669135341] [2023-03-31 20:34:55,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:34:55,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:55,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:34:55,831 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) [2023-03-31 20:34:55,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 20:34:55,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:34:55,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:34:55,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 25 conjunts are in the unsatisfiable core [2023-03-31 20:34:55,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:34:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-03-31 20:34:56,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:34:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-03-31 20:34:56,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669135341] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:34:56,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1340556503] [2023-03-31 20:34:56,622 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-03-31 20:34:56,622 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:34:56,622 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:34:56,622 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:34:56,622 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:34:56,636 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:34:56,673 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-03-31 20:34:56,679 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:34:56,681 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:34:57,019 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2234#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_6| Int) (|v_main_~#b~0.base_BEFORE_CALL_6| Int)) (and (<= 0 |v_main_~#a~0.base_BEFORE_CALL_6|) (<= 0 |v_main_~#b~0.base_BEFORE_CALL_6|) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_6|) 0) (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_6|) 0))))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:34:57,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:34:57,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:34:57,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-03-31 20:34:57,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060376231] [2023-03-31 20:34:57,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:34:57,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-03-31 20:34:57,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:34:57,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-03-31 20:34:57,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1318, Invalid=2588, Unknown=0, NotChecked=0, Total=3906 [2023-03-31 20:34:57,022 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 51 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:57,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:34:57,089 INFO L93 Difference]: Finished difference Result 104 states and 138 transitions. [2023-03-31 20:34:57,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-03-31 20:34:57,089 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-03-31 20:34:57,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:34:57,090 INFO L225 Difference]: With dead ends: 104 [2023-03-31 20:34:57,090 INFO L226 Difference]: Without dead ends: 79 [2023-03-31 20:34:57,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1318, Invalid=2588, Unknown=0, NotChecked=0, Total=3906 [2023-03-31 20:34:57,091 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:34:57,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 69 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:34:57,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-03-31 20:34:57,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-03-31 20:34:57,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 72 states have internal predecessors, (77), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:34:57,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2023-03-31 20:34:57,097 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 46 [2023-03-31 20:34:57,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:34:57,097 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2023-03-31 20:34:57,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:57,097 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2023-03-31 20:34:57,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-03-31 20:34:57,098 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:34:57,099 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:34:57,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 20:34:57,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:57,308 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:34:57,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:34:57,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1435630178, now seen corresponding path program 7 times [2023-03-31 20:34:57,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:34:57,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642651821] [2023-03-31 20:34:57,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:57,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:34:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-03-31 20:34:58,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:34:58,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642651821] [2023-03-31 20:34:58,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642651821] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:34:58,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124763223] [2023-03-31 20:34:58,942 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:34:58,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:58,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:34:58,943 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) [2023-03-31 20:34:58,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 20:34:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:59,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 50 conjunts are in the unsatisfiable core [2023-03-31 20:34:59,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:34:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-03-31 20:34:59,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:35:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-03-31 20:35:01,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124763223] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:35:01,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [967469410] [2023-03-31 20:35:01,418 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-03-31 20:35:01,418 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:35:01,418 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:35:01,418 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:35:01,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:35:01,436 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:35:01,480 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-03-31 20:35:01,487 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:35:01,489 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:35:01,941 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3107#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_7| Int) (|v_main_~#b~0.base_BEFORE_CALL_7| Int)) (and (<= 0 |v_main_~#a~0.base_BEFORE_CALL_7|) (not (= (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_7|) 0) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_7|) 0))) (<= 0 |v_main_~#b~0.base_BEFORE_CALL_7|))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:35:01,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:35:01,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:35:01,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2023-03-31 20:35:01,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444708805] [2023-03-31 20:35:01,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:35:01,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-03-31 20:35:01,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:35:01,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-03-31 20:35:01,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5093, Invalid=7563, Unknown=0, NotChecked=0, Total=12656 [2023-03-31 20:35:01,946 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 101 states, 101 states have (on average 1.0891089108910892) internal successors, (110), 101 states have internal predecessors, (110), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:35:02,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:35:02,066 INFO L93 Difference]: Finished difference Result 154 states and 213 transitions. [2023-03-31 20:35:02,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-03-31 20:35:02,066 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0891089108910892) internal successors, (110), 101 states have internal predecessors, (110), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2023-03-31 20:35:02,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:35:02,068 INFO L225 Difference]: With dead ends: 154 [2023-03-31 20:35:02,068 INFO L226 Difference]: Without dead ends: 129 [2023-03-31 20:35:02,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1970 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5093, Invalid=7563, Unknown=0, NotChecked=0, Total=12656 [2023-03-31 20:35:02,071 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:35:02,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 137 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:35:02,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-03-31 20:35:02,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-03-31 20:35:02,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 122 states have (on average 1.040983606557377) internal successors, (127), 122 states have internal predecessors, (127), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:35:02,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 134 transitions. [2023-03-31 20:35:02,093 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 134 transitions. Word has length 71 [2023-03-31 20:35:02,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:35:02,093 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 134 transitions. [2023-03-31 20:35:02,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0891089108910892) internal successors, (110), 101 states have internal predecessors, (110), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:35:02,093 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 134 transitions. [2023-03-31 20:35:02,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-03-31 20:35:02,094 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:35:02,094 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:35:02,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-03-31 20:35:02,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:35:02,295 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:35:02,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:35:02,296 INFO L85 PathProgramCache]: Analyzing trace with hash 501890974, now seen corresponding path program 8 times [2023-03-31 20:35:02,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:35:02,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61362004] [2023-03-31 20:35:02,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:35:02,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:35:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:35:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4906 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-03-31 20:35:08,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:35:08,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61362004] [2023-03-31 20:35:08,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61362004] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:35:08,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563156190] [2023-03-31 20:35:08,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:35:08,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:35:08,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:35:08,045 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) [2023-03-31 20:35:08,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 20:35:09,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-03-31 20:35:09,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:35:09,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 20:35:09,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:35:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4906 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2023-03-31 20:35:09,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:35:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4906 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2023-03-31 20:35:10,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563156190] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:35:10,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [241861004] [2023-03-31 20:35:10,122 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-03-31 20:35:10,122 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:35:10,123 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:35:10,123 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:35:10,123 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:35:10,145 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:35:10,185 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-03-31 20:35:10,190 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:35:10,193 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:35:10,884 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4502#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_8| Int) (|v_main_~#b~0.base_BEFORE_CALL_8| Int)) (and (<= 0 |v_main_~#a~0.base_BEFORE_CALL_8|) (not (= (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_8|) 0) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_8|) 0))) (<= 0 |v_main_~#b~0.base_BEFORE_CALL_8|))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:35:10,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:35:10,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:35:10,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 13, 13] total 123 [2023-03-31 20:35:10,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719286365] [2023-03-31 20:35:10,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:35:10,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2023-03-31 20:35:10,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:35:10,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2023-03-31 20:35:10,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5390, Invalid=12700, Unknown=0, NotChecked=0, Total=18090 [2023-03-31 20:35:10,890 INFO L87 Difference]: Start difference. First operand 129 states and 134 transitions. Second operand has 123 states, 123 states have (on average 1.1056910569105691) internal successors, (136), 123 states have internal predecessors, (136), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:35:14,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:35:14,429 INFO L93 Difference]: Finished difference Result 167 states and 189 transitions. [2023-03-31 20:35:14,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-03-31 20:35:14,429 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.1056910569105691) internal successors, (136), 123 states have internal predecessors, (136), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2023-03-31 20:35:14,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:35:14,430 INFO L225 Difference]: With dead ends: 167 [2023-03-31 20:35:14,430 INFO L226 Difference]: Without dead ends: 142 [2023-03-31 20:35:14,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9378 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=17567, Invalid=36955, Unknown=0, NotChecked=0, Total=54522 [2023-03-31 20:35:14,436 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 20:35:14,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 188 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 20:35:14,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-03-31 20:35:14,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2023-03-31 20:35:14,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 135 states have (on average 1.037037037037037) internal successors, (140), 135 states have internal predecessors, (140), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:35:14,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 147 transitions. [2023-03-31 20:35:14,445 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 147 transitions. Word has length 121 [2023-03-31 20:35:14,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:35:14,445 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 147 transitions. [2023-03-31 20:35:14,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.1056910569105691) internal successors, (136), 123 states have internal predecessors, (136), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:35:14,446 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 147 transitions. [2023-03-31 20:35:14,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-03-31 20:35:14,449 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:35:14,449 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:35:14,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-31 20:35:14,653 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,SelfDestructingSolverStorable9 [2023-03-31 20:35:14,653 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:35:14,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:35:14,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1149161838, now seen corresponding path program 9 times [2023-03-31 20:35:14,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:35:14,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175124130] [2023-03-31 20:35:14,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:35:14,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:35:14,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:35:19,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5203 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-03-31 20:35:19,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:35:19,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175124130] [2023-03-31 20:35:19,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175124130] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:35:19,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278033529] [2023-03-31 20:35:19,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:35:19,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:35:19,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:35:19,929 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:35:19,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 20:35:20,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:35:20,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:35:20,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 1960 conjuncts, 101 conjunts are in the unsatisfiable core [2023-03-31 20:35:20,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:35:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5203 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-03-31 20:35:20,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:35:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5203 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-03-31 20:35:29,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278033529] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:35:29,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1443762691] [2023-03-31 20:35:29,272 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-03-31 20:35:29,272 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:35:29,272 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:35:29,272 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:35:29,272 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:35:29,288 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:35:29,324 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-03-31 20:35:29,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:35:29,332 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:35:30,022 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6305#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_9| Int) (|v_main_~#b~0.base_BEFORE_CALL_9| Int)) (and (<= 0 |v_main_~#b~0.base_BEFORE_CALL_9|) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_9|) 0) (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_9|) 0))) (<= 0 |v_main_~#a~0.base_BEFORE_CALL_9|))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:35:30,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:35:30,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:35:30,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2023-03-31 20:35:30,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666039720] [2023-03-31 20:35:30,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:35:30,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-03-31 20:35:30,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:35:30,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-03-31 20:35:30,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20546, Invalid=25464, Unknown=0, NotChecked=0, Total=46010 [2023-03-31 20:35:30,030 INFO L87 Difference]: Start difference. First operand 142 states and 147 transitions. Second operand has 203 states, 203 states have (on average 1.0443349753694582) internal successors, (212), 203 states have internal predecessors, (212), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:35:30,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:35:30,343 INFO L93 Difference]: Finished difference Result 280 states and 390 transitions. [2023-03-31 20:35:30,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-03-31 20:35:30,343 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0443349753694582) internal successors, (212), 203 states have internal predecessors, (212), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2023-03-31 20:35:30,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:35:30,344 INFO L225 Difference]: With dead ends: 280 [2023-03-31 20:35:30,344 INFO L226 Difference]: Without dead ends: 243 [2023-03-31 20:35:30,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4010 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=20546, Invalid=25464, Unknown=0, NotChecked=0, Total=46010 [2023-03-31 20:35:30,346 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:35:30,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 120 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:35:30,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-03-31 20:35:30,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2023-03-31 20:35:30,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 236 states have (on average 1.021186440677966) internal successors, (241), 236 states have internal predecessors, (241), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:35:30,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 248 transitions. [2023-03-31 20:35:30,356 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 248 transitions. Word has length 134 [2023-03-31 20:35:30,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:35:30,356 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 248 transitions. [2023-03-31 20:35:30,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0443349753694582) internal successors, (212), 203 states have internal predecessors, (212), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:35:30,357 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 248 transitions. [2023-03-31 20:35:30,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2023-03-31 20:35:30,358 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:35:30,358 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:35:30,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-31 20:35:30,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:35:30,567 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:35:30,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:35:30,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1418665698, now seen corresponding path program 10 times [2023-03-31 20:35:30,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:35:30,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755132264] [2023-03-31 20:35:30,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:35:30,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:35:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat