/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 14:43:45,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 14:43:45,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 14:43:45,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 14:43:45,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 14:43:45,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 14:43:45,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 14:43:45,113 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 14:43:45,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 14:43:45,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 14:43:45,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 14:43:45,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 14:43:45,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 14:43:45,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 14:43:45,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 14:43:45,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 14:43:45,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 14:43:45,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 14:43:45,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 14:43:45,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 14:43:45,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 14:43:45,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 14:43:45,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 14:43:45,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 14:43:45,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 14:43:45,143 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 14:43:45,143 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 14:43:45,144 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 14:43:45,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 14:43:45,145 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 14:43:45,145 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 14:43:45,146 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 14:43:45,146 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 14:43:45,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 14:43:45,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 14:43:45,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 14:43:45,148 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 14:43:45,171 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 14:43:45,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 14:43:45,172 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 14:43:45,172 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 14:43:45,173 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 14:43:45,173 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 14:43:45,173 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 14:43:45,173 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 14:43:45,173 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 14:43:45,173 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 14:43:45,174 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 14:43:45,174 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 14:43:45,174 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 14:43:45,174 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 14:43:45,174 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 14:43:45,174 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 14:43:45,174 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 14:43:45,174 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 14:43:45,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 14:43:45,175 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 14:43:45,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 14:43:45,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 14:43:45,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 14:43:45,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 14:43:45,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 14:43:45,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 14:43:45,176 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 14:43:45,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 14:43:45,176 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 14:43:45,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 14:43:45,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 14:43:45,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 14:43:45,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:43:45,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 14:43:45,177 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 14:43:45,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 14:43:45,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 14:43:45,177 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 14:43:45,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 14:43:45,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 14:43:45,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 14:43:45,178 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 14:43:45,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 14:43:45,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 14:43:45,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 14:43:45,392 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 14:43:45,392 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 14:43:45,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c [2023-04-02 14:43:46,357 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 14:43:46,498 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 14:43:46,499 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c [2023-04-02 14:43:46,507 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58702bd4c/6eaf04aa0ec54e31926f6150b244b636/FLAGa2ef20cc5 [2023-04-02 14:43:46,521 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58702bd4c/6eaf04aa0ec54e31926f6150b244b636 [2023-04-02 14:43:46,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 14:43:46,525 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 14:43:46,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 14:43:46,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 14:43:46,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 14:43:46,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:43:46" (1/1) ... [2023-04-02 14:43:46,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35264f35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:43:46, skipping insertion in model container [2023-04-02 14:43:46,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:43:46" (1/1) ... [2023-04-02 14:43:46,537 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 14:43:46,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 14:43:46,667 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-programs/partial_mod_count_limited_1.c[331,344] [2023-04-02 14:43:46,685 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:43:46,693 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 14:43:46,702 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-programs/partial_mod_count_limited_1.c[331,344] [2023-04-02 14:43:46,715 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:43:46,727 INFO L208 MainTranslator]: Completed translation [2023-04-02 14:43:46,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:43:46 WrapperNode [2023-04-02 14:43:46,727 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 14:43:46,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 14:43:46,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 14:43:46,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 14:43:46,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:43:46" (1/1) ... [2023-04-02 14:43:46,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:43:46" (1/1) ... [2023-04-02 14:43:46,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:43:46" (1/1) ... [2023-04-02 14:43:46,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:43:46" (1/1) ... [2023-04-02 14:43:46,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:43:46" (1/1) ... [2023-04-02 14:43:46,749 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:43:46" (1/1) ... [2023-04-02 14:43:46,750 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:43:46" (1/1) ... [2023-04-02 14:43:46,751 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:43:46" (1/1) ... [2023-04-02 14:43:46,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 14:43:46,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 14:43:46,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 14:43:46,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 14:43:46,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:43:46" (1/1) ... [2023-04-02 14:43:46,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:43:46,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:43:46,790 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 14:43:46,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 14:43:46,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 14:43:46,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 14:43:46,820 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 14:43:46,820 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 14:43:46,820 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 14:43:46,820 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 14:43:46,820 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 14:43:46,820 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 14:43:46,821 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 14:43:46,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 14:43:46,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 14:43:46,821 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 14:43:46,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 14:43:46,821 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 14:43:46,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 14:43:46,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 14:43:46,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 14:43:46,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 14:43:46,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 14:43:46,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 14:43:46,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 14:43:46,874 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 14:43:46,876 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 14:43:47,003 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 14:43:47,063 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 14:43:47,063 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 14:43:47,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:43:47 BoogieIcfgContainer [2023-04-02 14:43:47,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 14:43:47,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 14:43:47,066 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 14:43:47,068 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 14:43:47,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:43:46" (1/3) ... [2023-04-02 14:43:47,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44dc6dbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:43:47, skipping insertion in model container [2023-04-02 14:43:47,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:43:46" (2/3) ... [2023-04-02 14:43:47,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44dc6dbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:43:47, skipping insertion in model container [2023-04-02 14:43:47,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:43:47" (3/3) ... [2023-04-02 14:43:47,070 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_1.c [2023-04-02 14:43:47,083 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 14:43:47,083 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 14:43:47,141 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 14:43:47,145 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;@19778158, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 14:43:47,146 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 14:43:47,151 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:43:47,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 14:43:47,157 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:43:47,157 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:43:47,158 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:43:47,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:43:47,167 INFO L85 PathProgramCache]: Analyzing trace with hash 745588606, now seen corresponding path program 1 times [2023-04-02 14:43:47,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:43:47,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780600312] [2023-04-02 14:43:47,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:43:47,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:43:47,284 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:43:47,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454236673] [2023-04-02 14:43:47,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:43:47,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:43:47,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:43:47,289 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:43:47,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 14:43:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:43:47,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:43:47,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:43:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:43:47,425 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 14:43:47,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:43:47,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780600312] [2023-04-02 14:43:47,425 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:43:47,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454236673] [2023-04-02 14:43:47,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454236673] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:43:47,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:43:47,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 14:43:47,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893182433] [2023-04-02 14:43:47,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:43:47,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 14:43:47,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:43:47,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 14:43:47,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 14:43:47,457 INFO L87 Difference]: Start difference. First operand has 22 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:43:47,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:43:47,548 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2023-04-02 14:43:47,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 14:43:47,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-04-02 14:43:47,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:43:47,555 INFO L225 Difference]: With dead ends: 38 [2023-04-02 14:43:47,555 INFO L226 Difference]: Without dead ends: 23 [2023-04-02 14:43:47,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 14:43:47,563 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:43:47,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 21 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:43:47,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-02 14:43:47,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2023-04-02 14:43:47,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:43:47,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-04-02 14:43:47,594 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2023-04-02 14:43:47,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:43:47,594 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-04-02 14:43:47,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:43:47,595 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-04-02 14:43:47,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-02 14:43:47,596 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:43:47,597 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:43:47,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 14:43:47,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-02 14:43:47,803 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:43:47,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:43:47,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1499595414, now seen corresponding path program 1 times [2023-04-02 14:43:47,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:43:47,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705502455] [2023-04-02 14:43:47,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:43:47,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:43:47,847 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:43:47,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460689945] [2023-04-02 14:43:47,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:43:47,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:43:47,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:43:47,850 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:43:47,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 14:43:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:43:47,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 14:43:47,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:43:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:43:47,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:43:47,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:43:47,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:43:47,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705502455] [2023-04-02 14:43:47,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:43:47,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460689945] [2023-04-02 14:43:47,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460689945] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:43:47,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [977101331] [2023-04-02 14:43:48,002 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-02 14:43:48,002 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:43:48,004 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:43:48,008 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:43:48,008 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:43:48,083 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:43:48,396 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2023-04-02 14:43:48,416 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 50 for LOIs [2023-04-02 14:43:48,428 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:43:48,433 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:43:49,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [977101331] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:43:49,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:43:49,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [5, 5] total 21 [2023-04-02 14:43:49,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442152853] [2023-04-02 14:43:49,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:43:49,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 14:43:49,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:43:49,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 14:43:49,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-04-02 14:43:49,009 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 15 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:43:50,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:43:50,505 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2023-04-02 14:43:50,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 14:43:50,506 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-04-02 14:43:50,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:43:50,507 INFO L225 Difference]: With dead ends: 29 [2023-04-02 14:43:50,507 INFO L226 Difference]: Without dead ends: 27 [2023-04-02 14:43:50,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=246, Invalid=876, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 14:43:50,508 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 14:43:50,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 6 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 14:43:50,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-02 14:43:50,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-04-02 14:43:50,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:43:50,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-04-02 14:43:50,517 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 16 [2023-04-02 14:43:50,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:43:50,517 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-04-02 14:43:50,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:43:50,517 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-04-02 14:43:50,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 14:43:50,518 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:43:50,518 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:43:50,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-02 14:43:50,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-02 14:43:50,725 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:43:50,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:43:50,726 INFO L85 PathProgramCache]: Analyzing trace with hash -2095682240, now seen corresponding path program 1 times [2023-04-02 14:43:50,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:43:50,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287616367] [2023-04-02 14:43:50,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:43:50,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:43:50,735 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:43:50,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540256778] [2023-04-02 14:43:50,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:43:50,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:43:50,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:43:50,737 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:43:50,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 14:43:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:43:50,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 14:43:50,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:43:50,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 14:43:50,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:43:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 14:43:50,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:43:50,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287616367] [2023-04-02 14:43:50,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:43:50,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540256778] [2023-04-02 14:43:50,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540256778] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:43:50,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1483284520] [2023-04-02 14:43:50,831 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:43:50,831 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:43:50,832 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:43:50,832 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:43:50,832 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:43:50,859 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:43:51,224 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-04-02 14:43:51,233 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 50 for LOIs [2023-04-02 14:43:51,239 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:43:51,242 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:43:51,857 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '522#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:43:51,857 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:43:51,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:43:51,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-02 14:43:51,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641730520] [2023-04-02 14:43:51,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:43:51,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 14:43:51,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:43:51,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 14:43:51,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2023-04-02 14:43:51,859 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:43:51,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:43:51,938 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2023-04-02 14:43:51,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 14:43:51,938 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 23 [2023-04-02 14:43:51,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:43:51,939 INFO L225 Difference]: With dead ends: 52 [2023-04-02 14:43:51,939 INFO L226 Difference]: Without dead ends: 37 [2023-04-02 14:43:51,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2023-04-02 14:43:51,940 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:43:51,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 25 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:43:51,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-02 14:43:51,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2023-04-02 14:43:51,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:43:51,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-04-02 14:43:51,948 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 23 [2023-04-02 14:43:51,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:43:51,948 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-04-02 14:43:51,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:43:51,949 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-04-02 14:43:51,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-02 14:43:51,949 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:43:51,949 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:43:51,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 14:43:52,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:43:52,154 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:43:52,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:43:52,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1823173036, now seen corresponding path program 2 times [2023-04-02 14:43:52,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:43:52,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940944666] [2023-04-02 14:43:52,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:43:52,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:43:52,165 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:43:52,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308516100] [2023-04-02 14:43:52,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:43:52,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:43:52,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:43:52,167 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:43:52,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 14:43:52,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 14:43:52,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:43:52,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-02 14:43:52,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:43:52,458 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 14:43:52,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 62 [2023-04-02 14:43:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:43:52,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:43:52,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:43:52,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940944666] [2023-04-02 14:43:52,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:43:52,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308516100] [2023-04-02 14:43:52,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308516100] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:43:52,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [175320001] [2023-04-02 14:43:52,763 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:43:52,763 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:43:52,763 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:43:52,763 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:43:52,764 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:43:52,784 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:43:53,202 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-04-02 14:43:53,212 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 50 for LOIs [2023-04-02 14:43:53,219 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:43:53,223 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:43:56,034 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '780#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:43:56,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:43:56,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 14:43:56,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-04-02 14:43:56,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680938698] [2023-04-02 14:43:56,035 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 14:43:56,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 14:43:56,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:43:56,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 14:43:56,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=840, Unknown=1, NotChecked=0, Total=992 [2023-04-02 14:43:56,036 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 12 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:43:57,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:43:57,310 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2023-04-02 14:43:57,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 14:43:57,310 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2023-04-02 14:43:57,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:43:57,311 INFO L225 Difference]: With dead ends: 40 [2023-04-02 14:43:57,311 INFO L226 Difference]: Without dead ends: 38 [2023-04-02 14:43:57,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=178, Invalid=1011, Unknown=1, NotChecked=0, Total=1190 [2023-04-02 14:43:57,312 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:43:57,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 49 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 131 Invalid, 3 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 14:43:57,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-02 14:43:57,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2023-04-02 14:43:57,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:43:57,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2023-04-02 14:43:57,329 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 26 [2023-04-02 14:43:57,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:43:57,329 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2023-04-02 14:43:57,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:43:57,330 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2023-04-02 14:43:57,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-02 14:43:57,330 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:43:57,330 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:43:57,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 14:43:57,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:43:57,531 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:43:57,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:43:57,531 INFO L85 PathProgramCache]: Analyzing trace with hash 191173310, now seen corresponding path program 3 times [2023-04-02 14:43:57,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:43:57,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136854938] [2023-04-02 14:43:57,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:43:57,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:43:57,552 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:43:57,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1168368347] [2023-04-02 14:43:57,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:43:57,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:43:57,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:43:57,553 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:43:57,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 14:43:57,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:43:57,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:43:57,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 14:43:57,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:43:57,644 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 14:43:57,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:43:57,690 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 14:43:57,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:43:57,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136854938] [2023-04-02 14:43:57,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:43:57,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168368347] [2023-04-02 14:43:57,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168368347] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:43:57,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [753221833] [2023-04-02 14:43:57,693 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:43:57,693 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:43:57,693 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:43:57,693 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:43:57,693 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:43:57,709 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:43:57,990 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-04-02 14:43:57,998 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 50 for LOIs [2023-04-02 14:43:58,003 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:43:58,006 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:43:58,660 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1127#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:43:58,660 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:43:58,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:43:58,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-04-02 14:43:58,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805947622] [2023-04-02 14:43:58,661 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:43:58,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 14:43:58,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:43:58,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 14:43:58,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2023-04-02 14:43:58,662 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:43:58,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:43:58,850 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2023-04-02 14:43:58,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 14:43:58,850 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 33 [2023-04-02 14:43:58,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:43:58,851 INFO L225 Difference]: With dead ends: 87 [2023-04-02 14:43:58,851 INFO L226 Difference]: Without dead ends: 65 [2023-04-02 14:43:58,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 14:43:58,853 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 62 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:43:58,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 38 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:43:58,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-04-02 14:43:58,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 42. [2023-04-02 14:43:58,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:43:58,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2023-04-02 14:43:58,863 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 33 [2023-04-02 14:43:58,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:43:58,863 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2023-04-02 14:43:58,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:43:58,864 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2023-04-02 14:43:58,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-02 14:43:58,864 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:43:58,864 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:43:58,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-02 14:43:59,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:43:59,069 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:43:59,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:43:59,070 INFO L85 PathProgramCache]: Analyzing trace with hash -547353794, now seen corresponding path program 4 times [2023-04-02 14:43:59,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:43:59,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396483685] [2023-04-02 14:43:59,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:43:59,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:43:59,083 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:43:59,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736341368] [2023-04-02 14:43:59,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:43:59,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:43:59,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:43:59,084 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:43:59,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 14:43:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:43:59,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 14:43:59,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:43:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 14:43:59,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:43:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 14:43:59,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:43:59,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396483685] [2023-04-02 14:43:59,413 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:43:59,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736341368] [2023-04-02 14:43:59,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736341368] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:43:59,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [118321315] [2023-04-02 14:43:59,415 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:43:59,415 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:43:59,415 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:43:59,415 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:43:59,415 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:43:59,430 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:43:59,720 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-04-02 14:43:59,730 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 50 for LOIs [2023-04-02 14:43:59,735 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:43:59,738 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:44:00,399 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1614#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:44:00,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:44:00,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:44:00,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-04-02 14:44:00,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161594231] [2023-04-02 14:44:00,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:44:00,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-02 14:44:00,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:44:00,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-02 14:44:00,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1257, Unknown=0, NotChecked=0, Total=1640 [2023-04-02 14:44:00,401 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:44:00,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:44:00,852 INFO L93 Difference]: Finished difference Result 135 states and 167 transitions. [2023-04-02 14:44:00,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-02 14:44:00,853 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 39 [2023-04-02 14:44:00,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:44:00,856 INFO L225 Difference]: With dead ends: 135 [2023-04-02 14:44:00,856 INFO L226 Difference]: Without dead ends: 113 [2023-04-02 14:44:00,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=669, Invalid=1983, Unknown=0, NotChecked=0, Total=2652 [2023-04-02 14:44:00,858 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 169 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:44:00,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 25 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 14:44:00,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-04-02 14:44:00,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 54. [2023-04-02 14:44:00,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 43 states have internal predecessors, (44), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:44:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2023-04-02 14:44:00,886 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 39 [2023-04-02 14:44:00,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:44:00,886 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2023-04-02 14:44:00,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:44:00,887 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2023-04-02 14:44:00,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-02 14:44:00,889 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:44:00,889 INFO L195 NwaCegarLoop]: trace histogram [22, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:44:00,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 14:44:01,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:44:01,095 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:44:01,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:44:01,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1456939970, now seen corresponding path program 5 times [2023-04-02 14:44:01,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:44:01,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432242234] [2023-04-02 14:44:01,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:44:01,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:44:01,121 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:44:01,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333838476] [2023-04-02 14:44:01,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:44:01,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:44:01,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:44:01,122 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:44:01,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 14:44:01,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 14:44:01,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:44:01,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-02 14:44:01,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:44:01,586 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 14:44:01,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 94 [2023-04-02 14:44:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2023-04-02 14:44:01,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:44:01,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:44:01,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432242234] [2023-04-02 14:44:01,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:44:01,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333838476] [2023-04-02 14:44:01,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333838476] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:44:01,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2062968453] [2023-04-02 14:44:01,894 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:44:01,894 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:44:01,894 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:44:01,894 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:44:01,894 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:44:01,910 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:44:02,193 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-04-02 14:44:02,201 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 50 for LOIs [2023-04-02 14:44:02,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:44:02,209 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:44:06,945 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2151#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:44:06,945 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:44:06,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 14:44:06,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-04-02 14:44:06,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538663044] [2023-04-02 14:44:06,946 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 14:44:06,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 14:44:06,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:44:06,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 14:44:06,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=785, Unknown=2, NotChecked=0, Total=930 [2023-04-02 14:44:06,947 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:44:08,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:44:08,768 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2023-04-02 14:44:08,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 14:44:08,769 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 51 [2023-04-02 14:44:08,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:44:08,769 INFO L225 Difference]: With dead ends: 65 [2023-04-02 14:44:08,769 INFO L226 Difference]: Without dead ends: 63 [2023-04-02 14:44:08,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=170, Invalid=950, Unknown=2, NotChecked=0, Total=1122 [2023-04-02 14:44:08,770 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 5 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-02 14:44:08,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 44 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 107 Invalid, 4 Unknown, 0 Unchecked, 1.8s Time] [2023-04-02 14:44:08,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-04-02 14:44:08,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2023-04-02 14:44:08,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 48 states have internal predecessors, (49), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 14:44:08,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2023-04-02 14:44:08,791 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 51 [2023-04-02 14:44:08,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:44:08,791 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2023-04-02 14:44:08,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:44:08,791 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2023-04-02 14:44:08,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-02 14:44:08,792 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:44:08,792 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:44:08,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 14:44:08,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:44:08,997 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:44:08,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:44:08,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1129383956, now seen corresponding path program 6 times [2023-04-02 14:44:08,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:44:08,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012134197] [2023-04-02 14:44:08,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:44:08,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:44:09,027 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:44:09,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572425590] [2023-04-02 14:44:09,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:44:09,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:44:09,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:44:09,031 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:44:09,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 14:44:09,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:44:09,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:44:09,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-02 14:44:09,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:44:09,441 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-02 14:44:09,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:44:09,862 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 6 proven. 253 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-02 14:44:09,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:44:09,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012134197] [2023-04-02 14:44:09,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:44:09,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572425590] [2023-04-02 14:44:09,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572425590] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:44:09,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [636182112] [2023-04-02 14:44:09,864 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:44:09,864 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:44:09,864 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:44:09,865 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:44:09,865 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:44:09,877 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:44:10,145 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-04-02 14:44:10,153 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 50 for LOIs [2023-04-02 14:44:10,158 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:44:10,160 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:44:10,893 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2776#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:44:10,893 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:44:10,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:44:10,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2023-04-02 14:44:10,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050720892] [2023-04-02 14:44:10,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:44:10,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-02 14:44:10,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:44:10,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-02 14:44:10,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1259, Invalid=2901, Unknown=0, NotChecked=0, Total=4160 [2023-04-02 14:44:10,895 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 50 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:44:12,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:44:12,047 INFO L93 Difference]: Finished difference Result 242 states and 309 transitions. [2023-04-02 14:44:12,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-02 14:44:12,048 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 58 [2023-04-02 14:44:12,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:44:12,049 INFO L225 Difference]: With dead ends: 242 [2023-04-02 14:44:12,049 INFO L226 Difference]: Without dead ends: 213 [2023-04-02 14:44:12,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2418 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2409, Invalid=5247, Unknown=0, NotChecked=0, Total=7656 [2023-04-02 14:44:12,051 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 264 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 14:44:12,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 44 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 14:44:12,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-04-02 14:44:12,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 85. [2023-04-02 14:44:12,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 71 states have (on average 1.028169014084507) internal successors, (73), 72 states have internal predecessors, (73), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 14:44:12,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2023-04-02 14:44:12,077 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 58 [2023-04-02 14:44:12,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:44:12,077 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2023-04-02 14:44:12,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:44:12,077 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2023-04-02 14:44:12,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-02 14:44:12,078 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:44:12,078 INFO L195 NwaCegarLoop]: trace histogram [46, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:44:12,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-02 14:44:12,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-02 14:44:12,278 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:44:12,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:44:12,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1330091500, now seen corresponding path program 7 times [2023-04-02 14:44:12,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:44:12,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277815986] [2023-04-02 14:44:12,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:44:12,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:44:12,313 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:44:12,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207129474] [2023-04-02 14:44:12,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:44:12,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:44:12,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:44:12,316 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:44:12,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 14:44:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:44:12,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-02 14:44:12,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:44:13,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-02 14:44:13,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:44:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 6 proven. 1081 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-02 14:44:15,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:44:15,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277815986] [2023-04-02 14:44:15,010 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:44:15,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207129474] [2023-04-02 14:44:15,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207129474] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:44:15,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1094520028] [2023-04-02 14:44:15,012 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:44:15,012 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:44:15,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:44:15,012 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:44:15,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:44:15,033 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:44:15,304 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-04-02 14:44:15,311 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 50 for LOIs [2023-04-02 14:44:15,315 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:44:15,317 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:44:16,294 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3978#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:44:16,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:44:16,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:44:16,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2023-04-02 14:44:16,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064793169] [2023-04-02 14:44:16,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:44:16,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-04-02 14:44:16,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:44:16,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-04-02 14:44:16,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4739, Invalid=7917, Unknown=0, NotChecked=0, Total=12656 [2023-04-02 14:44:16,298 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 98 states, 98 states have (on average 1.1428571428571428) internal successors, (112), 98 states have internal predecessors, (112), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:44:20,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:44:20,323 INFO L93 Difference]: Finished difference Result 434 states and 573 transitions. [2023-04-02 14:44:20,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-04-02 14:44:20,323 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.1428571428571428) internal successors, (112), 98 states have internal predecessors, (112), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 82 [2023-04-02 14:44:20,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:44:20,325 INFO L225 Difference]: With dead ends: 434 [2023-04-02 14:44:20,325 INFO L226 Difference]: Without dead ends: 405 [2023-04-02 14:44:20,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7170 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=9345, Invalid=16095, Unknown=0, NotChecked=0, Total=25440 [2023-04-02 14:44:20,330 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 690 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 870 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:44:20,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [737 Valid, 61 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [870 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 14:44:20,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2023-04-02 14:44:20,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 133. [2023-04-02 14:44:20,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 120 states have internal predecessors, (121), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 14:44:20,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2023-04-02 14:44:20,371 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 82 [2023-04-02 14:44:20,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:44:20,371 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2023-04-02 14:44:20,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.1428571428571428) internal successors, (112), 98 states have internal predecessors, (112), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:44:20,371 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2023-04-02 14:44:20,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-04-02 14:44:20,372 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:44:20,372 INFO L195 NwaCegarLoop]: trace histogram [94, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:44:20,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 14:44:20,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:44:20,579 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:44:20,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:44:20,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1493881324, now seen corresponding path program 8 times [2023-04-02 14:44:20,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:44:20,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206463156] [2023-04-02 14:44:20,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:44:20,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:44:20,621 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:44:20,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800449362] [2023-04-02 14:44:20,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:44:20,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:44:20,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:44:20,622 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:44:20,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 14:44:21,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 14:44:21,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:44:21,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 45 conjunts are in the unsatisfiable core [2023-04-02 14:44:21,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:44:21,836 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 14:44:21,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 99 [2023-04-02 14:44:22,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4498 backedges. 3 proven. 211 refuted. 0 times theorem prover too weak. 4284 trivial. 0 not checked. [2023-04-02 14:44:22,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:44:22,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:44:22,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206463156] [2023-04-02 14:44:22,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:44:22,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800449362] [2023-04-02 14:44:22,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800449362] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:44:22,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2123118685] [2023-04-02 14:44:22,222 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:44:22,222 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:44:22,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:44:22,222 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:44:22,222 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:44:22,240 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:44:22,506 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-04-02 14:44:22,512 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 50 for LOIs [2023-04-02 14:44:22,518 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:44:22,520 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:44:29,320 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5503#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:44:29,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:44:29,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 14:44:29,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-04-02 14:44:29,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409334670] [2023-04-02 14:44:29,321 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 14:44:29,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-02 14:44:29,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:44:29,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-02 14:44:29,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1138, Unknown=3, NotChecked=0, Total=1332 [2023-04-02 14:44:29,322 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 17 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:44:32,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-04-02 14:44:35,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:44:35,899 INFO L93 Difference]: Finished difference Result 144 states and 145 transitions. [2023-04-02 14:44:35,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 14:44:35,900 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 130 [2023-04-02 14:44:35,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:44:35,901 INFO L225 Difference]: With dead ends: 144 [2023-04-02 14:44:35,901 INFO L226 Difference]: Without dead ends: 142 [2023-04-02 14:44:35,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 228 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=218, Invalid=1339, Unknown=3, NotChecked=0, Total=1560 [2023-04-02 14:44:35,902 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 4 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2023-04-02 14:44:35,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 72 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 192 Invalid, 12 Unknown, 0 Unchecked, 6.5s Time] [2023-04-02 14:44:35,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-04-02 14:44:35,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2023-04-02 14:44:35,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 125 states have internal predecessors, (126), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 14:44:35,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2023-04-02 14:44:35,952 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 130 [2023-04-02 14:44:35,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:44:35,953 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2023-04-02 14:44:35,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:44:35,953 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2023-04-02 14:44:35,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-02 14:44:35,954 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:44:35,954 INFO L195 NwaCegarLoop]: trace histogram [94, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:44:35,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 14:44:36,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 14:44:36,157 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:44:36,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:44:36,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1196694914, now seen corresponding path program 9 times [2023-04-02 14:44:36,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:44:36,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545454312] [2023-04-02 14:44:36,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:44:36,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:44:36,205 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:44:36,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651175405] [2023-04-02 14:44:36,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:44:36,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:44:36,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:44:36,206 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:44:36,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 14:44:36,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:44:36,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:44:36,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 97 conjunts are in the unsatisfiable core [2023-04-02 14:44:36,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:44:39,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4523 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-04-02 14:44:39,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:44:45,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4523 backedges. 8 proven. 4465 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-04-02 14:44:45,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:44:45,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545454312] [2023-04-02 14:44:45,676 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:44:45,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651175405] [2023-04-02 14:44:45,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651175405] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:44:45,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [869609052] [2023-04-02 14:44:45,678 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:44:45,678 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:44:45,678 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:44:45,678 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:44:45,678 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:44:45,689 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:44:45,942 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-04-02 14:44:45,949 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 50 for LOIs [2023-04-02 14:44:45,954 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:44:45,956 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:44:47,338 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7054#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:44:47,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:44:47,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:44:47,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 194 [2023-04-02 14:44:47,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366600899] [2023-04-02 14:44:47,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:44:47,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2023-04-02 14:44:47,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:44:47,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2023-04-02 14:44:47,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18611, Invalid=24861, Unknown=0, NotChecked=0, Total=43472 [2023-04-02 14:44:47,345 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 194 states, 194 states have (on average 1.0721649484536082) internal successors, (208), 194 states have internal predecessors, (208), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:45:12,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:45:12,201 INFO L93 Difference]: Finished difference Result 829 states and 1111 transitions. [2023-04-02 14:45:12,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2023-04-02 14:45:12,202 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 1.0721649484536082) internal successors, (208), 194 states have internal predecessors, (208), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 137 [2023-04-02 14:45:12,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:45:12,205 INFO L225 Difference]: With dead ends: 829 [2023-04-02 14:45:12,205 INFO L226 Difference]: Without dead ends: 793 [2023-04-02 14:45:12,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23586 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=37041, Invalid=55071, Unknown=0, NotChecked=0, Total=92112 [2023-04-02 14:45:12,209 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1516 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 2048 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1611 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 2862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2048 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-04-02 14:45:12,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1611 Valid, 49 Invalid, 2862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2048 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2023-04-02 14:45:12,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2023-04-02 14:45:12,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 236. [2023-04-02 14:45:12,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 220 states have (on average 1.009090909090909) internal successors, (222), 221 states have internal predecessors, (222), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 14:45:12,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 237 transitions. [2023-04-02 14:45:12,299 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 237 transitions. Word has length 137 [2023-04-02 14:45:12,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:45:12,299 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 237 transitions. [2023-04-02 14:45:12,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 1.0721649484536082) internal successors, (208), 194 states have internal predecessors, (208), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:45:12,299 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 237 transitions. [2023-04-02 14:45:12,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2023-04-02 14:45:12,301 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:45:12,301 INFO L195 NwaCegarLoop]: trace histogram [190, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:45:12,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-02 14:45:12,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 14:45:12,505 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:45:12,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:45:12,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1809421698, now seen corresponding path program 10 times [2023-04-02 14:45:12,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:45:12,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75208518] [2023-04-02 14:45:12,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:45:12,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:45:12,591 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:45:12,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668205437] [2023-04-02 14:45:12,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:45:12,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:45:12,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:45:12,592 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:45:12,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 14:45:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:45:13,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 2234 conjuncts, 193 conjunts are in the unsatisfiable core [2023-04-02 14:45:13,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:45:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 18203 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-04-02 14:45:25,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:45:48,326 INFO L134 CoverageAnalysis]: Checked inductivity of 18203 backedges. 8 proven. 18145 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-04-02 14:45:48,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:45:48,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75208518] [2023-04-02 14:45:48,327 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:45:48,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668205437] [2023-04-02 14:45:48,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668205437] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:45:48,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1212212198] [2023-04-02 14:45:48,328 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:45:48,328 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:45:48,328 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:45:48,328 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:45:48,328 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:45:48,339 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:45:48,618 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-04-02 14:45:48,624 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 50 for LOIs [2023-04-02 14:45:48,629 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:45:48,631 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:45:50,733 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10915#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:45:50,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:45:50,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:45:50,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 194] total 386 [2023-04-02 14:45:50,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597643077] [2023-04-02 14:45:50,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:45:50,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 386 states [2023-04-02 14:45:50,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:45:50,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 386 interpolants. [2023-04-02 14:45:50,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74003, Invalid=86397, Unknown=0, NotChecked=0, Total=160400 [2023-04-02 14:45:50,749 INFO L87 Difference]: Start difference. First operand 236 states and 237 transitions. Second operand has 386 states, 386 states have (on average 1.0362694300518134) internal successors, (400), 386 states have internal predecessors, (400), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6)