/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/nla-digbench-scaling/prodbin-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:22:15,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:22:15,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:22:15,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:22:15,345 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:22:15,347 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:22:15,350 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:22:15,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:22:15,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:22:15,358 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:22:15,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:22:15,361 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:22:15,361 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:22:15,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:22:15,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:22:15,366 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:22:15,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:22:15,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:22:15,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:22:15,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:22:15,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:22:15,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:22:15,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:22:15,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:22:15,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 23:22:15,389 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:22:15,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:22:15,391 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:22:15,391 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:22:15,392 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:22:15,392 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:22:15,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:22:15,393 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:22:15,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:22:15,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:22:15,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:22:15,395 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 23:22:15,427 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:22:15,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:22:15,428 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:22:15,428 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:22:15,428 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:22:15,429 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:22:15,429 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:22:15,429 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:22:15,429 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:22:15,429 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:22:15,430 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:22:15,430 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:22:15,430 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:22:15,430 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:22:15,430 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:22:15,431 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:22:15,431 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:22:15,431 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:22:15,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:22:15,432 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:22:15,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:22:15,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:22:15,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:22:15,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:22:15,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:22:15,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:22:15,433 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:22:15,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:22:15,433 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:22:15,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:22:15,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:22:15,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:22:15,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:22:15,434 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:22:15,434 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:22:15,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:22:15,435 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:22:15,435 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:22:15,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:22:15,435 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:22:15,435 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:22:15,435 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:22:15,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:22:15,636 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:22:15,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:22:15,639 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:22:15,640 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:22:15,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2023-04-02 23:22:16,760 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:22:16,932 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:22:16,933 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2023-04-02 23:22:16,938 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0d9d7974/0a826a7802564bc5a65637d99c19a860/FLAG5ea23ed0c [2023-04-02 23:22:16,952 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0d9d7974/0a826a7802564bc5a65637d99c19a860 [2023-04-02 23:22:16,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:22:16,955 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:22:16,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:22:16,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:22:16,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:22:16,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:22:16" (1/1) ... [2023-04-02 23:22:16,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@229612b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:22:16, skipping insertion in model container [2023-04-02 23:22:16,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:22:16" (1/1) ... [2023-04-02 23:22:16,968 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:22:16,985 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:22:17,090 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/nla-digbench-scaling/prodbin-ll_unwindbound100.c[1263,1276] [2023-04-02 23:22:17,101 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:22:17,109 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:22:17,117 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/nla-digbench-scaling/prodbin-ll_unwindbound100.c[1263,1276] [2023-04-02 23:22:17,120 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:22:17,130 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:22:17,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:22:17 WrapperNode [2023-04-02 23:22:17,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:22:17,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:22:17,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:22:17,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:22:17,140 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:22:17" (1/1) ... [2023-04-02 23:22:17,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:22:17" (1/1) ... [2023-04-02 23:22:17,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:22:17" (1/1) ... [2023-04-02 23:22:17,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:22:17" (1/1) ... [2023-04-02 23:22:17,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:22:17" (1/1) ... [2023-04-02 23:22:17,156 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:22:17" (1/1) ... [2023-04-02 23:22:17,157 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:22:17" (1/1) ... [2023-04-02 23:22:17,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:22:17" (1/1) ... [2023-04-02 23:22:17,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:22:17,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:22:17,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:22:17,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:22:17,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:22:17" (1/1) ... [2023-04-02 23:22:17,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:22:17,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:22:17,185 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 23:22:17,193 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 23:22:17,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:22:17,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:22:17,222 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:22:17,222 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 23:22:17,222 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 23:22:17,222 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:22:17,222 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:22:17,222 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:22:17,223 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:22:17,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:22:17,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:22:17,223 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 23:22:17,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 23:22:17,223 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:22:17,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:22:17,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:22:17,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:22:17,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:22:17,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:22:17,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:22:17,274 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:22:17,276 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:22:17,473 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:22:17,513 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:22:17,513 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 23:22:17,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:22:17 BoogieIcfgContainer [2023-04-02 23:22:17,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:22:17,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:22:17,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:22:17,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:22:17,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:22:16" (1/3) ... [2023-04-02 23:22:17,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f7de876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:22:17, skipping insertion in model container [2023-04-02 23:22:17,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:22:17" (2/3) ... [2023-04-02 23:22:17,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f7de876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:22:17, skipping insertion in model container [2023-04-02 23:22:17,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:22:17" (3/3) ... [2023-04-02 23:22:17,522 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound100.c [2023-04-02 23:22:17,535 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:22:17,536 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:22:17,573 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:22:17,578 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;@2b83955b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:22:17,579 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:22:17,582 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 23:22:17,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 23:22:17,588 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:22:17,588 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:22:17,589 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:22:17,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:22:17,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1769481206, now seen corresponding path program 1 times [2023-04-02 23:22:17,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:22:17,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178078275] [2023-04-02 23:22:17,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:17,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:22:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:22:17,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:22:17,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178078275] [2023-04-02 23:22:17,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 23:22:17,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987936332] [2023-04-02 23:22:17,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:17,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:22:17,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:22:17,777 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 23:22:17,804 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 23:22:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:22:17,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 23:22:17,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:22:17,881 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 23:22:17,882 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:22:17,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987936332] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:22:17,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:22:17,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 23:22:17,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140453041] [2023-04-02 23:22:17,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:22:17,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 23:22:17,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:22:17,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 23:22:17,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 23:22:17,922 INFO L87 Difference]: Start difference. First operand has 24 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 23:22:17,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:22:17,945 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-04-02 23:22:17,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 23:22:17,947 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2023-04-02 23:22:17,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:22:17,963 INFO L225 Difference]: With dead ends: 39 [2023-04-02 23:22:17,963 INFO L226 Difference]: Without dead ends: 20 [2023-04-02 23:22:17,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 23:22:17,968 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:22:17,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:22:17,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-02 23:22:18,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-02 23:22:18,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 5 states have call successors, (5), 4 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 23:22:18,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-04-02 23:22:18,004 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 14 [2023-04-02 23:22:18,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:22:18,005 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-04-02 23:22:18,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 23:22:18,006 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-04-02 23:22:18,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 23:22:18,007 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:22:18,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:22:18,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 23:22:18,212 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 23:22:18,213 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:22:18,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:22:18,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1591584392, now seen corresponding path program 1 times [2023-04-02 23:22:18,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:22:18,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414808910] [2023-04-02 23:22:18,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:18,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:22:18,230 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:22:18,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462857791] [2023-04-02 23:22:18,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:18,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:22:18,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:22:18,234 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 23:22:18,236 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 23:22:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:22:18,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 23:22:18,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:22:18,387 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 23:22:18,388 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:22:18,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:22:18,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414808910] [2023-04-02 23:22:18,388 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:22:18,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462857791] [2023-04-02 23:22:18,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462857791] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:22:18,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:22:18,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:22:18,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235321406] [2023-04-02 23:22:18,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:22:18,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:22:18,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:22:18,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:22:18,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:22:18,392 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. 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 23:22:18,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:22:18,416 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2023-04-02 23:22:18,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 23:22:18,417 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 23:22:18,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:22:18,418 INFO L225 Difference]: With dead ends: 29 [2023-04-02 23:22:18,418 INFO L226 Difference]: Without dead ends: 22 [2023-04-02 23:22:18,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:22:18,419 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:22:18,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:22:18,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-02 23:22:18,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-02 23:22:18,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 5 states have call successors, (5), 4 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 23:22:18,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-04-02 23:22:18,429 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2023-04-02 23:22:18,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:22:18,429 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-04-02 23:22:18,429 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 23:22:18,429 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-04-02 23:22:18,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 23:22:18,430 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:22:18,430 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:22:18,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 23:22:18,636 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 23:22:18,637 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:22:18,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:22:18,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1589796932, now seen corresponding path program 1 times [2023-04-02 23:22:18,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:22:18,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147362598] [2023-04-02 23:22:18,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:18,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:22:18,654 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:22:18,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785481860] [2023-04-02 23:22:18,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:18,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:22:18,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:22:18,661 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 23:22:18,663 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 23:22:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:22:18,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-02 23:22:18,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:22:18,840 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 23:22:18,840 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:22:18,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:22:18,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147362598] [2023-04-02 23:22:18,841 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:22:18,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785481860] [2023-04-02 23:22:18,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785481860] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:22:18,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:22:18,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:22:18,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705546686] [2023-04-02 23:22:18,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:22:18,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:22:18,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:22:18,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:22:18,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:22:18,846 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 23:22:18,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:22:18,914 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2023-04-02 23:22:18,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 23:22:18,914 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2023-04-02 23:22:18,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:22:18,916 INFO L225 Difference]: With dead ends: 35 [2023-04-02 23:22:18,916 INFO L226 Difference]: Without dead ends: 28 [2023-04-02 23:22:18,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:22:18,919 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 11 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:22:18,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 58 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:22:18,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-02 23:22:18,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-02 23:22:18,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 23:22:18,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-04-02 23:22:18,928 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 15 [2023-04-02 23:22:18,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:22:18,929 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-04-02 23:22:18,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 23:22:18,929 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-04-02 23:22:18,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 23:22:18,930 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:22:18,930 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:22:18,935 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 23:22:19,133 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 23:22:19,134 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:22:19,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:22:19,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1250956511, now seen corresponding path program 1 times [2023-04-02 23:22:19,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:22:19,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043483445] [2023-04-02 23:22:19,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:19,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:22:19,148 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:22:19,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1542670233] [2023-04-02 23:22:19,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:19,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:22:19,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:22:19,153 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 23:22:19,154 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 23:22:19,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:22:19,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 23:22:19,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:22:19,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:22:19,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:22:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:22:19,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:22:19,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043483445] [2023-04-02 23:22:19,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:22:19,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542670233] [2023-04-02 23:22:19,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542670233] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:22:19,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1793500397] [2023-04-02 23:22:19,345 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 23:22:19,346 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:22:19,353 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:22:19,357 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:22:19,357 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:22:19,433 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:22:20,044 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2023-04-02 23:22:20,071 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 23:22:20,079 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:22:20,088 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:22:20,749 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '557#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 23:22:20,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:22:20,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:22:20,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-02 23:22:20,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113887987] [2023-04-02 23:22:20,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:22:20,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:22:20,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:22:20,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:22:20,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2023-04-02 23:22:20,752 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-02 23:22:20,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:22:20,821 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2023-04-02 23:22:20,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 23:22:20,821 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 23 [2023-04-02 23:22:20,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:22:20,822 INFO L225 Difference]: With dead ends: 59 [2023-04-02 23:22:20,823 INFO L226 Difference]: Without dead ends: 52 [2023-04-02 23:22:20,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2023-04-02 23:22:20,824 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 25 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:22:20,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 59 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:22:20,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-02 23:22:20,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2023-04-02 23:22:20,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 23:22:20,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2023-04-02 23:22:20,832 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 23 [2023-04-02 23:22:20,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:22:20,833 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2023-04-02 23:22:20,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-02 23:22:20,833 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2023-04-02 23:22:20,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 23:22:20,834 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:22:20,834 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:22:20,842 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 23:22:21,040 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 23:22:21,040 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:22:21,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:22:21,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1249169051, now seen corresponding path program 1 times [2023-04-02 23:22:21,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:22:21,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059703050] [2023-04-02 23:22:21,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:21,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:22:21,071 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:22:21,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833501034] [2023-04-02 23:22:21,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:21,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:22:21,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:22:21,076 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 23:22:21,079 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 23:22:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:22:21,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-02 23:22:21,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:22:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:22:25,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:22:34,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:22:34,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:22:34,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059703050] [2023-04-02 23:22:34,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:22:34,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833501034] [2023-04-02 23:22:34,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833501034] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:22:34,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [929769221] [2023-04-02 23:22:34,943 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 23:22:34,943 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:22:34,943 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:22:34,943 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:22:34,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:22:34,962 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:22:35,213 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 66 for LOIs [2023-04-02 23:22:35,262 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 23:22:35,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:22:35,270 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:22:36,322 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '883#(and (<= 1 |#StackHeapBarrier|) (< ~counter~0 101) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 23:22:36,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:22:36,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:22:36,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2023-04-02 23:22:36,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73613737] [2023-04-02 23:22:36,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:22:36,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 23:22:36,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:22:36,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 23:22:36,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2023-04-02 23:22:36,325 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 12 states have internal predecessors, (25), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 23:22:38,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 23:22:42,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:22:42,733 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2023-04-02 23:22:42,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 23:22:42,734 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 12 states have internal predecessors, (25), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 23 [2023-04-02 23:22:42,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:22:42,736 INFO L225 Difference]: With dead ends: 64 [2023-04-02 23:22:42,736 INFO L226 Difference]: Without dead ends: 58 [2023-04-02 23:22:42,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 23:22:42,737 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:22:42,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 111 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-02 23:22:42,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-04-02 23:22:42,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2023-04-02 23:22:42,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 23:22:42,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2023-04-02 23:22:42,747 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 23 [2023-04-02 23:22:42,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:22:42,747 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2023-04-02 23:22:42,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 12 states have internal predecessors, (25), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 23:22:42,747 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2023-04-02 23:22:42,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 23:22:42,748 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:22:42,748 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:22:42,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 23:22:42,952 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 23:22:42,953 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:22:42,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:22:42,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1962950411, now seen corresponding path program 1 times [2023-04-02 23:22:42,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:22:42,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896918069] [2023-04-02 23:22:42,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:42,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:22:42,965 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:22:42,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894262110] [2023-04-02 23:22:42,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:42,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:22:42,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:22:42,973 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 23:22:42,975 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 23:22:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:22:43,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 23:22:43,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:22:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 23:22:43,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:22:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 23:22:43,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:22:43,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896918069] [2023-04-02 23:22:43,168 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:22:43,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894262110] [2023-04-02 23:22:43,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894262110] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:22:43,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [880242833] [2023-04-02 23:22:43,170 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 23:22:43,170 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:22:43,171 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:22:43,171 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:22:43,171 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:22:43,203 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:22:43,519 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-04-02 23:22:43,525 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 23:22:43,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:22:43,534 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:22:44,748 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1257#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~counter~0 100) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 23:22:44,748 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:22:44,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:22:44,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-04-02 23:22:44,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265134440] [2023-04-02 23:22:44,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:22:44,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 23:22:44,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:22:44,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 23:22:44,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2023-04-02 23:22:44,750 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 23:22:44,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:22:44,831 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2023-04-02 23:22:44,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 23:22:44,833 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 29 [2023-04-02 23:22:44,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:22:44,835 INFO L225 Difference]: With dead ends: 61 [2023-04-02 23:22:44,835 INFO L226 Difference]: Without dead ends: 51 [2023-04-02 23:22:44,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2023-04-02 23:22:44,837 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 15 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:22:44,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 73 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:22:44,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-04-02 23:22:44,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-04-02 23:22:44,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 36 states have internal predecessors, (36), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 23:22:44,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2023-04-02 23:22:44,851 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 29 [2023-04-02 23:22:44,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:22:44,852 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2023-04-02 23:22:44,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 23:22:44,852 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2023-04-02 23:22:44,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 23:22:44,853 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:22:44,853 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:22:44,861 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 23:22:45,061 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 23:22:45,061 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:22:45,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:22:45,061 INFO L85 PathProgramCache]: Analyzing trace with hash -20559332, now seen corresponding path program 2 times [2023-04-02 23:22:45,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:22:45,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622783246] [2023-04-02 23:22:45,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:45,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:22:45,076 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:22:45,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [261906716] [2023-04-02 23:22:45,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 23:22:45,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:22:45,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:22:45,078 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 23:22:45,080 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 23:22:45,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-02 23:22:45,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:22:45,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 23:22:45,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:22:45,193 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:22:45,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:22:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 23:22:45,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:22:45,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622783246] [2023-04-02 23:22:45,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:22:45,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261906716] [2023-04-02 23:22:45,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261906716] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:22:45,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [261613651] [2023-04-02 23:22:45,288 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 23:22:45,288 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:22:45,288 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:22:45,288 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:22:45,288 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:22:45,306 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:22:45,559 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2023-04-02 23:22:45,572 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 23:22:45,576 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:22:45,580 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:22:46,167 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1730#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 23:22:46,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:22:46,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:22:46,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-04-02 23:22:46,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554421952] [2023-04-02 23:22:46,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:22:46,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 23:22:46,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:22:46,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 23:22:46,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2023-04-02 23:22:46,170 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2023-04-02 23:22:46,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:22:46,349 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2023-04-02 23:22:46,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-02 23:22:46,349 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 47 [2023-04-02 23:22:46,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:22:46,351 INFO L225 Difference]: With dead ends: 111 [2023-04-02 23:22:46,351 INFO L226 Difference]: Without dead ends: 104 [2023-04-02 23:22:46,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=308, Invalid=1174, Unknown=0, NotChecked=0, Total=1482 [2023-04-02 23:22:46,352 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 48 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:22:46,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 98 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:22:46,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-04-02 23:22:46,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2023-04-02 23:22:46,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 68 states have internal predecessors, (74), 14 states have call successors, (14), 13 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-02 23:22:46,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2023-04-02 23:22:46,363 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 47 [2023-04-02 23:22:46,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:22:46,363 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2023-04-02 23:22:46,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2023-04-02 23:22:46,363 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2023-04-02 23:22:46,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 23:22:46,364 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:22:46,364 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:22:46,372 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 23:22:46,570 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 23:22:46,570 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:22:46,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:22:46,571 INFO L85 PathProgramCache]: Analyzing trace with hash -18771872, now seen corresponding path program 2 times [2023-04-02 23:22:46,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:22:46,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971447118] [2023-04-02 23:22:46,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:46,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:22:46,592 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:22:46,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043727371] [2023-04-02 23:22:46,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 23:22:46,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:22:46,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:22:46,594 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 23:22:46,597 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 23:22:46,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-02 23:22:46,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:22:46,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 36 conjunts are in the unsatisfiable core [2023-04-02 23:22:46,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:23:06,605 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 18 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:23:06,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:23:19,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:23:19,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971447118] [2023-04-02 23:23:19,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:23:19,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043727371] [2023-04-02 23:23:19,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043727371] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:23:19,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1269458417] [2023-04-02 23:23:19,739 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 23:23:19,739 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:23:19,739 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:23:19,739 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:23:19,739 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:23:19,761 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:23:19,970 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 66 for LOIs [2023-04-02 23:23:20,018 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 23:23:20,025 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:23:20,029 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:23:21,206 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2228#(and (<= 1 |#StackHeapBarrier|) (< ~counter~0 101) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 23:23:21,206 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:23:21,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:23:21,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-04-02 23:23:21,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496062214] [2023-04-02 23:23:21,207 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 23:23:21,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 23:23:21,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:23:21,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 23:23:21,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1000, Unknown=3, NotChecked=0, Total=1122 [2023-04-02 23:23:21,208 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-02 23:23:23,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-04-02 23:23:25,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-04-02 23:23:33,666 WARN L223 SmtUtils]: Spent 7.93s on a formula simplification. DAG size of input: 82 DAG size of output: 72 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 23:23:47,521 WARN L223 SmtUtils]: Spent 9.80s on a formula simplification. DAG size of input: 80 DAG size of output: 72 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 23:23:49,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-04-02 23:24:09,170 WARN L223 SmtUtils]: Spent 11.08s on a formula simplification. DAG size of input: 75 DAG size of output: 72 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 23:24:11,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-04-02 23:24:13,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-04-02 23:24:13,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:24:13,558 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2023-04-02 23:24:13,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 23:24:13,558 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 47 [2023-04-02 23:24:13,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:24:13,560 INFO L225 Difference]: With dead ends: 96 [2023-04-02 23:24:13,560 INFO L226 Difference]: Without dead ends: 94 [2023-04-02 23:24:13,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 55.0s TimeCoverageRelationStatistics Valid=199, Invalid=1516, Unknown=7, NotChecked=0, Total=1722 [2023-04-02 23:24:13,561 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 7 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2023-04-02 23:24:13,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 136 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 168 Invalid, 5 Unknown, 0 Unchecked, 11.6s Time] [2023-04-02 23:24:13,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-04-02 23:24:13,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-04-02 23:24:13,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 68 states have internal predecessors, (73), 14 states have call successors, (14), 13 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-02 23:24:13,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2023-04-02 23:24:13,580 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 47 [2023-04-02 23:24:13,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:24:13,581 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2023-04-02 23:24:13,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-02 23:24:13,581 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2023-04-02 23:24:13,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-02 23:24:13,582 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:24:13,582 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:24:13,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 23:24:13,782 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 23:24:13,783 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:24:13,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:24:13,783 INFO L85 PathProgramCache]: Analyzing trace with hash -468304375, now seen corresponding path program 3 times [2023-04-02 23:24:13,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:24:13,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915992655] [2023-04-02 23:24:13,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:24:13,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:24:13,795 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:24:13,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1095787690] [2023-04-02 23:24:13,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 23:24:13,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:24:13,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:24:13,797 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 23:24:13,801 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 23:24:17,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 23:24:17,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:24:17,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 71 conjunts are in the unsatisfiable core [2023-04-02 23:24:17,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:25:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 5 proven. 60 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-02 23:25:18,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:25:46,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:25:46,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915992655] [2023-04-02 23:25:46,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:25:46,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095787690] [2023-04-02 23:25:46,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095787690] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:25:46,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [187961353] [2023-04-02 23:25:46,283 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 23:25:46,283 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:25:46,283 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:25:46,283 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:25:46,283 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:25:46,303 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:25:46,463 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 66 for LOIs [2023-04-02 23:25:46,494 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 23:25:46,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:25:46,502 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:25:48,063 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2758#(and (<= 1 |#StackHeapBarrier|) (< ~counter~0 101) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 23:25:48,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:25:48,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:25:48,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-04-02 23:25:48,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426401516] [2023-04-02 23:25:48,064 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 23:25:48,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 23:25:48,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:25:48,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 23:25:48,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1241, Unknown=10, NotChecked=0, Total=1406 [2023-04-02 23:25:48,066 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-02 23:25:53,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 23:25:55,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 23:25:57,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 23:25:59,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 23:26:01,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 23:26:01,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:26:01,812 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2023-04-02 23:26:01,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 23:26:01,813 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 55 [2023-04-02 23:26:01,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:26:01,814 INFO L225 Difference]: With dead ends: 96 [2023-04-02 23:26:01,814 INFO L226 Difference]: Without dead ends: 94 [2023-04-02 23:26:01,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 83 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 38.9s TimeCoverageRelationStatistics Valid=172, Invalid=1378, Unknown=10, NotChecked=0, Total=1560 [2023-04-02 23:26:01,815 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 20 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2023-04-02 23:26:01,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 224 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 304 Invalid, 3 Unknown, 0 Unchecked, 13.7s Time] [2023-04-02 23:26:01,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-04-02 23:26:01,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-04-02 23:26:01,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 68 states have internal predecessors, (72), 14 states have call successors, (14), 13 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-02 23:26:01,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2023-04-02 23:26:01,832 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 55 [2023-04-02 23:26:01,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:26:01,833 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2023-04-02 23:26:01,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-02 23:26:01,833 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2023-04-02 23:26:01,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-02 23:26:01,834 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:26:01,834 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:26:01,841 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 23:26:02,037 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 23:26:02,037 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:26:02,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:26:02,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1971008178, now seen corresponding path program 4 times [2023-04-02 23:26:02,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:26:02,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175635830] [2023-04-02 23:26:02,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:26:02,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:26:02,045 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:26:02,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [439146568] [2023-04-02 23:26:02,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 23:26:02,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:26:02,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:26:02,046 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 23:26:02,066 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 23:26:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:26:04,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 86 conjunts are in the unsatisfiable core [2023-04-02 23:26:04,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:26:29,640 WARN L223 SmtUtils]: Spent 7.84s on a formula simplification. DAG size of input: 101 DAG size of output: 40 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)