/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/nla-digbench/ps5-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:09:47,323 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:09:47,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:09:47,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:09:47,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:09:47,365 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:09:47,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:09:47,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:09:47,371 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:09:47,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:09:47,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:09:47,378 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:09:47,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:09:47,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:09:47,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:09:47,382 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:09:47,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:09:47,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:09:47,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:09:47,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:09:47,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:09:47,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:09:47,392 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:09:47,393 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:09:47,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 23:09:47,401 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 23:09:47,401 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 23:09:47,402 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 23:09:47,403 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 23:09:47,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 23:09:47,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:09:47,404 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:09:47,405 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:09:47,406 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:09:47,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:09:47,407 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:09:47,407 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:09:47,407 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:09:47,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:09:47,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:09:47,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:09:47,410 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 23:09:47,436 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:09:47,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:09:47,437 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:09:47,437 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:09:47,437 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:09:47,438 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:09:47,438 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:09:47,438 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:09:47,438 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:09:47,438 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:09:47,439 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:09:47,439 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:09:47,439 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:09:47,439 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:09:47,439 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:09:47,440 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:09:47,440 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:09:47,440 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:09:47,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:09:47,441 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:09:47,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:09:47,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:09:47,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:09:47,441 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:09:47,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:09:47,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:09:47,442 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:09:47,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:09:47,442 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:09:47,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:09:47,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:09:47,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:09:47,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:09:47,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:09:47,443 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:09:47,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:09:47,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:09:47,443 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:09:47,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:09:47,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:09:47,444 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:09:47,444 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:09:47,674 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:09:47,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:09:47,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:09:47,696 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:09:47,697 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:09:47,698 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/ps5-ll.c [2023-03-31 23:09:48,868 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:09:49,036 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:09:49,037 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/ps5-ll.c [2023-03-31 23:09:49,042 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74db4b107/b1e2d36a4ad941c4a204da1544ed8501/FLAG8a28b582a [2023-03-31 23:09:49,053 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74db4b107/b1e2d36a4ad941c4a204da1544ed8501 [2023-03-31 23:09:49,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:09:49,057 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:09:49,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:09:49,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:09:49,060 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:09:49,061 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:09:49" (1/1) ... [2023-03-31 23:09:49,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@134886c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:09:49, skipping insertion in model container [2023-03-31 23:09:49,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:09:49" (1/1) ... [2023-03-31 23:09:49,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:09:49,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:09:49,177 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/ps5-ll.c[458,471] [2023-03-31 23:09:49,190 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:09:49,197 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:09:49,207 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/ps5-ll.c[458,471] [2023-03-31 23:09:49,212 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:09:49,222 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:09:49,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:09:49 WrapperNode [2023-03-31 23:09:49,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:09:49,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:09:49,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:09:49,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:09:49,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:09:49" (1/1) ... [2023-03-31 23:09:49,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:09:49" (1/1) ... [2023-03-31 23:09:49,236 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:09:49" (1/1) ... [2023-03-31 23:09:49,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:09:49" (1/1) ... [2023-03-31 23:09:49,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:09:49" (1/1) ... [2023-03-31 23:09:49,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:09:49" (1/1) ... [2023-03-31 23:09:49,243 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:09:49" (1/1) ... [2023-03-31 23:09:49,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:09:49" (1/1) ... [2023-03-31 23:09:49,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:09:49,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:09:49,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:09:49,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:09:49,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:09:49" (1/1) ... [2023-03-31 23:09:49,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:09:49,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:09:49,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 23:09:49,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 23:09:49,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:09:49,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:09:49,307 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:09:49,307 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 23:09:49,308 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 23:09:49,308 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:09:49,308 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:09:49,308 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:09:49,308 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:09:49,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:09:49,308 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-03-31 23:09:49,309 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 23:09:49,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 23:09:49,309 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:09:49,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:09:49,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:09:49,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:09:49,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:09:49,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:09:49,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:09:49,369 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:09:49,371 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:09:49,486 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:09:49,506 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:09:49,506 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 23:09:49,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:09:49 BoogieIcfgContainer [2023-03-31 23:09:49,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:09:49,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:09:49,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:09:49,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:09:49,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:09:49" (1/3) ... [2023-03-31 23:09:49,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6798d872 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:09:49, skipping insertion in model container [2023-03-31 23:09:49,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:09:49" (2/3) ... [2023-03-31 23:09:49,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6798d872 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:09:49, skipping insertion in model container [2023-03-31 23:09:49,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:09:49" (3/3) ... [2023-03-31 23:09:49,520 INFO L112 eAbstractionObserver]: Analyzing ICFG ps5-ll.c [2023-03-31 23:09:49,531 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:09:49,532 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:09:49,569 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:09:49,574 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;@25aa3fdd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:09:49,575 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:09:49,578 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 23:09:49,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-03-31 23:09:49,584 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:09:49,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:09:49,585 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:09:49,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:09:49,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1070716929, now seen corresponding path program 1 times [2023-03-31 23:09:49,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:09:49,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813555571] [2023-03-31 23:09:49,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:09:49,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:09:49,675 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:09:49,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179615406] [2023-03-31 23:09:49,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:09:49,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:09:49,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:09:49,679 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:09:49,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 23:09:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:09:49,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2023-03-31 23:09:49,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:09:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:09:49,955 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:09:49,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:09:49,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813555571] [2023-03-31 23:09:49,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:09:49,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179615406] [2023-03-31 23:09:49,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179615406] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:09:49,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:09:49,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 23:09:49,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165505688] [2023-03-31 23:09:49,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:09:49,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 23:09:49,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:09:49,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 23:09:49,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:09:49,995 INFO L87 Difference]: Start difference. First operand has 24 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 23:09:50,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:09:50,130 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2023-03-31 23:09:50,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:09:50,132 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2023-03-31 23:09:50,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:09:50,138 INFO L225 Difference]: With dead ends: 50 [2023-03-31 23:09:50,138 INFO L226 Difference]: Without dead ends: 27 [2023-03-31 23:09:50,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:09:50,145 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:09:50,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 68 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:09:50,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-03-31 23:09:50,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-03-31 23:09:50,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 23:09:50,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-03-31 23:09:50,173 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 14 [2023-03-31 23:09:50,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:09:50,174 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-03-31 23:09:50,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 23:09:50,176 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-03-31 23:09:50,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 23:09:50,177 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:09:50,177 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:09:50,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 23:09:50,378 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 [2023-03-31 23:09:50,378 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:09:50,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:09:50,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1540599750, now seen corresponding path program 1 times [2023-03-31 23:09:50,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:09:50,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122193070] [2023-03-31 23:09:50,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:09:50,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:09:50,395 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:09:50,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [730127811] [2023-03-31 23:09:50,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:09:50,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:09:50,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:09:50,397 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:09:50,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 23:09:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:09:50,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2023-03-31 23:09:50,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:09:50,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:09:50,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:09:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:09:50,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:09:50,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122193070] [2023-03-31 23:09:50,775 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:09:50,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730127811] [2023-03-31 23:09:50,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730127811] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:09:50,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [271329380] [2023-03-31 23:09:50,799 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-03-31 23:09:50,799 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:09:50,803 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:09:50,807 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:09:50,807 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:09:50,874 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:09:51,130 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 52 for LOIs [2023-03-31 23:09:51,243 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 26 for LOIs [2023-03-31 23:09:51,249 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:09:51,254 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:09:51,839 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '320#(and (exists ((v_main_~x~0_BEFORE_CALL_11 Int) (v_main_~y~0_BEFORE_CALL_11 Int) (v_main_~c~0_BEFORE_CALL_7 Int) (v_main_~k~0_BEFORE_CALL_9 Int)) (and (not (= (+ v_main_~y~0_BEFORE_CALL_11 (* 30 v_main_~x~0_BEFORE_CALL_11)) (+ (* 15 (* v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11)) (* (* v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11) 6) (* (* v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11) 10)))) (or (and (<= 0 v_main_~k~0_BEFORE_CALL_9) (<= 1 v_main_~y~0_BEFORE_CALL_11) (<= v_main_~k~0_BEFORE_CALL_9 256) (<= v_main_~c~0_BEFORE_CALL_7 257) (<= 1 v_main_~x~0_BEFORE_CALL_11) (= |#NULL.offset| 0) (<= 1 v_main_~c~0_BEFORE_CALL_7) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (<= 0 (+ 32768 v_main_~k~0_BEFORE_CALL_9)) (= v_main_~y~0_BEFORE_CALL_11 0) (<= v_main_~k~0_BEFORE_CALL_9 256) (= v_main_~x~0_BEFORE_CALL_11 0) (= v_main_~c~0_BEFORE_CALL_7 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:09:51,840 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:09:51,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:09:51,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-03-31 23:09:51,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327346010] [2023-03-31 23:09:51,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:09:51,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 23:09:51,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:09:51,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 23:09:51,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2023-03-31 23:09:51,843 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 23:09:51,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:09:51,962 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2023-03-31 23:09:51,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 23:09:51,962 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2023-03-31 23:09:51,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:09:51,963 INFO L225 Difference]: With dead ends: 38 [2023-03-31 23:09:51,963 INFO L226 Difference]: Without dead ends: 34 [2023-03-31 23:09:51,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2023-03-31 23:09:51,965 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:09:51,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 85 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:09:51,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-03-31 23:09:51,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2023-03-31 23:09:51,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 23:09:51,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-03-31 23:09:51,974 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 21 [2023-03-31 23:09:51,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:09:51,974 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-03-31 23:09:51,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 23:09:51,974 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-03-31 23:09:51,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-03-31 23:09:51,975 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:09:51,975 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:09:51,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 23:09:52,181 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 [2023-03-31 23:09:52,181 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:09:52,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:09:52,182 INFO L85 PathProgramCache]: Analyzing trace with hash -507517747, now seen corresponding path program 1 times [2023-03-31 23:09:52,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:09:52,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972490257] [2023-03-31 23:09:52,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:09:52,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:09:52,193 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:09:52,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796513521] [2023-03-31 23:09:52,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:09:52,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:09:52,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:09:52,198 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:09:52,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 23:09:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:09:52,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2023-03-31 23:09:52,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:09:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 23:09:52,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:09:56,412 WARN L839 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 15 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 29 c_main_~y~0) (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 30) 0)) (= (* c_main_~y~0 c_main_~k~0) (* c_main_~y~0 c_main_~y~0))) is different from false [2023-03-31 23:10:17,769 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~y~0_BEFORE_CALL_16 Int) (v_main_~k~0_BEFORE_CALL_14 Int)) (or (= (mod (+ (* v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 15) (* v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 6) (* 29 v_main_~y~0_BEFORE_CALL_16) (* v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 10)) 30) 0) (= (* v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16) (* v_main_~y~0_BEFORE_CALL_16 v_main_~k~0_BEFORE_CALL_14))))) is different from true [2023-03-31 23:10:36,760 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~y~0_BEFORE_CALL_16 Int) (v_main_~k~0_BEFORE_CALL_14 Int)) (or (= (mod (+ (* v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 15) (* v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 6) (* 29 v_main_~y~0_BEFORE_CALL_16) (* v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16 10)) 30) 0) (= (* v_main_~y~0_BEFORE_CALL_16 v_main_~y~0_BEFORE_CALL_16) (* v_main_~y~0_BEFORE_CALL_16 v_main_~k~0_BEFORE_CALL_14)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-03-31 23:10:40,778 WARN L839 $PredicateComparison]: unable to prove that (or (< c_main_~c~0 c_main_~k~0) (not (= (mod (+ (* 15 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 29 c_main_~y~0) (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 30) 0)) (= (* c_main_~y~0 c_main_~k~0) (* c_main_~y~0 c_main_~y~0))) is different from false [2023-03-31 23:10:48,842 WARN L839 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 15 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 29 c_main_~y~0) (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 30) 0)) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (<= main_~k~0 c_main_~c~0) (= (+ (* main_~k~0 c_main_~y~0) main_~k~0) (+ (* 2 c_main_~y~0) (* c_main_~y~0 c_main_~y~0) 1))))) is different from false [2023-03-31 23:10:51,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:10:51,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972490257] [2023-03-31 23:10:51,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:10:51,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796513521] [2023-03-31 23:10:51,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796513521] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:10:51,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1195322389] [2023-03-31 23:10:51,272 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-03-31 23:10:51,272 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:10:51,273 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:10:51,273 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:10:51,273 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:10:51,290 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:10:51,434 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:10:51,437 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 26 for LOIs [2023-03-31 23:10:51,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:10:51,445 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:10:51,771 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '601#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:10:51,771 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:10:51,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:10:51,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-03-31 23:10:51,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165389358] [2023-03-31 23:10:51,772 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 23:10:51,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 23:10:51,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:10:51,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 23:10:51,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=442, Unknown=5, NotChecked=230, Total=756 [2023-03-31 23:10:51,773 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-03-31 23:10:51,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:10:51,891 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2023-03-31 23:10:51,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 23:10:51,892 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 32 [2023-03-31 23:10:51,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:10:51,893 INFO L225 Difference]: With dead ends: 38 [2023-03-31 23:10:51,893 INFO L226 Difference]: Without dead ends: 32 [2023-03-31 23:10:51,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=92, Invalid=523, Unknown=5, NotChecked=250, Total=870 [2023-03-31 23:10:51,894 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:10:51,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 73 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:10:51,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-03-31 23:10:51,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-03-31 23:10:51,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 23:10:51,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2023-03-31 23:10:51,907 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 32 [2023-03-31 23:10:51,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:10:51,907 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2023-03-31 23:10:51,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-03-31 23:10:51,908 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2023-03-31 23:10:51,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-03-31 23:10:51,909 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:10:51,910 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:10:51,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 23:10:52,115 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 [2023-03-31 23:10:52,116 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:10:52,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:10:52,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1998825684, now seen corresponding path program 2 times [2023-03-31 23:10:52,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:10:52,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259778647] [2023-03-31 23:10:52,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:10:52,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:10:52,133 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:10:52,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202015379] [2023-03-31 23:10:52,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 23:10:52,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:10:52,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:10:52,138 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:10:52,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 23:10:52,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 23:10:52,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:10:52,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2023-03-31 23:10:52,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:10:52,390 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 23:10:52,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:10:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 23:10:52,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:10:52,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259778647] [2023-03-31 23:10:52,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:10:52,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202015379] [2023-03-31 23:10:52,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202015379] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:10:52,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [588982372] [2023-03-31 23:10:52,574 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-03-31 23:10:52,575 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:10:52,575 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:10:52,576 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:10:52,576 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:10:52,592 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:10:52,748 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:10:52,753 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 26 for LOIs [2023-03-31 23:10:52,757 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:10:52,760 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:10:53,120 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '972#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:10:53,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:10:53,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:10:53,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-03-31 23:10:53,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563188387] [2023-03-31 23:10:53,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:10:53,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-03-31 23:10:53,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:10:53,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-03-31 23:10:53,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2023-03-31 23:10:53,123 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 16 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 9 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-03-31 23:10:53,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:10:53,505 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2023-03-31 23:10:53,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-31 23:10:53,505 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 9 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) Word has length 39 [2023-03-31 23:10:53,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:10:53,506 INFO L225 Difference]: With dead ends: 49 [2023-03-31 23:10:53,506 INFO L226 Difference]: Without dead ends: 41 [2023-03-31 23:10:53,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2023-03-31 23:10:53,508 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 16 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:10:53,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 151 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:10:53,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-03-31 23:10:53,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-03-31 23:10:53,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-03-31 23:10:53,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2023-03-31 23:10:53,526 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 39 [2023-03-31 23:10:53,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:10:53,526 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2023-03-31 23:10:53,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 9 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-03-31 23:10:53,526 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2023-03-31 23:10:53,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-03-31 23:10:53,530 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:10:53,530 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:10:53,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 23:10:53,739 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 [2023-03-31 23:10:53,740 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:10:53,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:10:53,740 INFO L85 PathProgramCache]: Analyzing trace with hash -10018547, now seen corresponding path program 3 times [2023-03-31 23:10:53,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:10:53,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025725585] [2023-03-31 23:10:53,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:10:53,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:10:53,754 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:10:53,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783306992] [2023-03-31 23:10:53,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 23:10:53,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:10:53,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:10:53,769 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:10:53,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 23:10:53,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 23:10:53,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:10:53,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 31 conjunts are in the unsatisfiable core [2023-03-31 23:10:53,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:10:53,958 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-03-31 23:10:53,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:10:54,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:10:54,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025725585] [2023-03-31 23:10:54,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:10:54,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783306992] [2023-03-31 23:10:54,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783306992] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:10:54,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1336652240] [2023-03-31 23:10:54,130 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-03-31 23:10:54,130 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:10:54,131 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:10:54,131 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:10:54,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:10:54,154 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:10:54,280 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:10:54,283 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 26 for LOIs [2023-03-31 23:10:54,287 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:10:54,290 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:10:54,642 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1389#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:10:54,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:10:54,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:10:54,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-03-31 23:10:54,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033808184] [2023-03-31 23:10:54,643 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 23:10:54,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 23:10:54,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:10:54,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 23:10:54,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2023-03-31 23:10:54,645 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-03-31 23:10:54,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:10:54,839 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2023-03-31 23:10:54,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 23:10:54,839 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 60 [2023-03-31 23:10:54,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:10:54,841 INFO L225 Difference]: With dead ends: 50 [2023-03-31 23:10:54,841 INFO L226 Difference]: Without dead ends: 44 [2023-03-31 23:10:54,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2023-03-31 23:10:54,842 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:10:54,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 185 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:10:54,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-03-31 23:10:54,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-03-31 23:10:54,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-31 23:10:54,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2023-03-31 23:10:54,854 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 60 [2023-03-31 23:10:54,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:10:54,854 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2023-03-31 23:10:54,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-03-31 23:10:54,854 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2023-03-31 23:10:54,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-03-31 23:10:54,855 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:10:54,855 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:10:54,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 23:10:55,061 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 [2023-03-31 23:10:55,061 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:10:55,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:10:55,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1100209004, now seen corresponding path program 4 times [2023-03-31 23:10:55,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:10:55,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127956291] [2023-03-31 23:10:55,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:10:55,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:10:55,072 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:10:55,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894976178] [2023-03-31 23:10:55,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 23:10:55,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:10:55,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:10:55,078 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:10:55,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 23:10:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:10:56,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 40 conjunts are in the unsatisfiable core [2023-03-31 23:10:56,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:10:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-03-31 23:10:56,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:11:00,535 WARN L839 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 15 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 29 c_main_~y~0) (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 30) 0)) (= (* c_main_~y~0 c_main_~k~0) (* c_main_~y~0 c_main_~y~0))) is different from false