/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/prod4br-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:21:48,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:21:48,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:21:48,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:21:48,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:21:48,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:21:48,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:21:48,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:21:48,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:21:48,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:21:48,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:21:48,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:21:48,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:21:48,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:21:48,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:21:48,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:21:48,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:21:48,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:21:48,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:21:48,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:21:48,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:21:48,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:21:48,461 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:21:48,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:21:48,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:21:48,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:21:48,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:21:48,466 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:21:48,466 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:21:48,467 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:21:48,467 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:21:48,468 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:21:48,468 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:21:48,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:21:48,470 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:21:48,470 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:21:48,471 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:21:48,471 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:21:48,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:21:48,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:21:48,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:21:48,473 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 23:21:48,500 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:21:48,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:21:48,505 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:21:48,505 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:21:48,505 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:21:48,506 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:21:48,506 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:21:48,506 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:21:48,506 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:21:48,506 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:21:48,507 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:21:48,507 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:21:48,507 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:21:48,507 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:21:48,507 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:21:48,507 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:21:48,507 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:21:48,508 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:21:48,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:21:48,508 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:21:48,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:21:48,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:21:48,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:21:48,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:21:48,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:21:48,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:21:48,509 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:21:48,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:21:48,509 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:21:48,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:21:48,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:21:48,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:21:48,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:21:48,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:21:48,511 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:21:48,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:21:48,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:21:48,511 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:21:48,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:21:48,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:21:48,511 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:21:48,511 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:21:48,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:21:48,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:21:48,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:21:48,747 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:21:48,748 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:21:48,748 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound5.c [2023-04-02 23:21:49,853 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:21:50,029 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:21:50,029 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound5.c [2023-04-02 23:21:50,036 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71dd3112e/a78abfd930f9410989290c4a68775c24/FLAG003b90d12 [2023-04-02 23:21:50,050 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71dd3112e/a78abfd930f9410989290c4a68775c24 [2023-04-02 23:21:50,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:21:50,055 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:21:50,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:21:50,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:21:50,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:21:50,061 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:21:50" (1/1) ... [2023-04-02 23:21:50,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47081f03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:21:50, skipping insertion in model container [2023-04-02 23:21:50,063 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:21:50" (1/1) ... [2023-04-02 23:21:50,069 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:21:50,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:21:50,219 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/prod4br-ll_unwindbound5.c[524,537] [2023-04-02 23:21:50,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:21:50,252 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:21:50,262 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/prod4br-ll_unwindbound5.c[524,537] [2023-04-02 23:21:50,274 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:21:50,286 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:21:50,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:21:50 WrapperNode [2023-04-02 23:21:50,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:21:50,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:21:50,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:21:50,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:21:50,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:21:50" (1/1) ... [2023-04-02 23:21:50,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:21:50" (1/1) ... [2023-04-02 23:21:50,299 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:21:50" (1/1) ... [2023-04-02 23:21:50,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:21:50" (1/1) ... [2023-04-02 23:21:50,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:21:50" (1/1) ... [2023-04-02 23:21:50,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:21:50" (1/1) ... [2023-04-02 23:21:50,307 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:21:50" (1/1) ... [2023-04-02 23:21:50,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:21:50" (1/1) ... [2023-04-02 23:21:50,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:21:50,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:21:50,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:21:50,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:21:50,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:21:50" (1/1) ... [2023-04-02 23:21:50,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:21:50,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:21:50,336 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 23:21:50,338 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 23:21:50,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:21:50,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:21:50,369 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:21:50,369 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 23:21:50,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 23:21:50,370 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:21:50,370 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:21:50,373 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:21:50,373 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:21:50,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:21:50,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:21:50,374 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 23:21:50,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 23:21:50,374 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:21:50,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:21:50,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:21:50,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:21:50,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:21:50,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:21:50,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:21:50,432 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:21:50,433 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:21:50,667 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:21:50,748 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:21:50,748 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 23:21:50,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:21:50 BoogieIcfgContainer [2023-04-02 23:21:50,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:21:50,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:21:50,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:21:50,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:21:50,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:21:50" (1/3) ... [2023-04-02 23:21:50,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10993012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:21:50, skipping insertion in model container [2023-04-02 23:21:50,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:21:50" (2/3) ... [2023-04-02 23:21:50,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10993012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:21:50, skipping insertion in model container [2023-04-02 23:21:50,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:21:50" (3/3) ... [2023-04-02 23:21:50,756 INFO L112 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound5.c [2023-04-02 23:21:50,771 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:21:50,771 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:21:50,809 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:21:50,814 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;@48cb6025, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:21:50,815 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:21:50,819 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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) [2023-04-02 23:21:50,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 23:21:50,830 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:21:50,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:21:50,831 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:21:50,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:21:50,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1357817023, now seen corresponding path program 1 times [2023-04-02 23:21:50,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:21:50,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288081957] [2023-04-02 23:21:50,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:50,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:21:50,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:21:50,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:21:50,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288081957] [2023-04-02 23:21:50,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 23:21:50,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50848704] [2023-04-02 23:21:50,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:50,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:21:50,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:21:50,997 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 23:21:51,020 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 23:21:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:21:51,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 23:21:51,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:21:51,157 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 23:21:51,157 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:21:51,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50848704] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:21:51,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:21:51,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 23:21:51,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344063343] [2023-04-02 23:21:51,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:21:51,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 23:21:51,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:21:51,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 23:21:51,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 23:21:51,201 INFO L87 Difference]: Start difference. First operand has 25 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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 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 23:21:51,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:21:51,239 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2023-04-02 23:21:51,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 23:21:51,241 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 23:21:51,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:21:51,246 INFO L225 Difference]: With dead ends: 41 [2023-04-02 23:21:51,247 INFO L226 Difference]: Without dead ends: 21 [2023-04-02 23:21:51,250 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 23:21:51,254 INFO L413 NwaCegarLoop]: 24 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, 24 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 23:21:51,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:21:51,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-02 23:21:51,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-02 23:21:51,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 23:21:51,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-04-02 23:21:51,290 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2023-04-02 23:21:51,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:21:51,290 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-04-02 23:21:51,291 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 23:21:51,291 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-04-02 23:21:51,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 23:21:51,292 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:21:51,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:21:51,304 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 23:21:51,498 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 23:21:51,499 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:21:51,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:21:51,500 INFO L85 PathProgramCache]: Analyzing trace with hash -20479242, now seen corresponding path program 1 times [2023-04-02 23:21:51,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:21:51,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096106723] [2023-04-02 23:21:51,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:51,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:21:51,522 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:21:51,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081120643] [2023-04-02 23:21:51,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:51,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:21:51,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:21:51,524 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 23:21:51,527 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 23:21:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:21:51,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 23:21:51,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:21:51,625 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 23:21:51,626 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:21:51,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:21:51,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096106723] [2023-04-02 23:21:51,626 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:21:51,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081120643] [2023-04-02 23:21:51,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081120643] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:21:51,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:21:51,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:21:51,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903576613] [2023-04-02 23:21:51,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:21:51,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:21:51,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:21:51,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:21:51,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:21:51,629 INFO L87 Difference]: Start difference. First operand 21 states and 24 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 23:21:51,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:21:51,647 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2023-04-02 23:21:51,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 23:21:51,648 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 23:21:51,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:21:51,648 INFO L225 Difference]: With dead ends: 31 [2023-04-02 23:21:51,648 INFO L226 Difference]: Without dead ends: 23 [2023-04-02 23:21:51,649 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 23:21:51,650 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 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 23:21:51,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:21:51,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-02 23:21:51,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-04-02 23:21:51,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 23:21:51,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-04-02 23:21:51,657 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2023-04-02 23:21:51,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:21:51,658 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-04-02 23:21:51,658 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 23:21:51,658 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-04-02 23:21:51,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 23:21:51,659 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:21:51,659 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:21:51,665 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 23:21:51,864 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 23:21:51,865 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:21:51,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:21:51,865 INFO L85 PathProgramCache]: Analyzing trace with hash -18691782, now seen corresponding path program 1 times [2023-04-02 23:21:51,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:21:51,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78757179] [2023-04-02 23:21:51,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:51,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:21:51,883 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:21:51,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1352338527] [2023-04-02 23:21:51,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:51,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:21:51,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:21:51,890 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 23:21:51,891 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 23:21:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:21:51,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 23:21:51,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:21:52,025 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 23:21:52,026 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:21:52,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:21:52,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78757179] [2023-04-02 23:21:52,026 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:21:52,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352338527] [2023-04-02 23:21:52,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352338527] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:21:52,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:21:52,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 23:21:52,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724050722] [2023-04-02 23:21:52,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:21:52,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:21:52,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:21:52,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:21:52,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:21:52,033 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 23:21:52,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:21:52,085 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-04-02 23:21:52,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:21:52,086 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 15 [2023-04-02 23:21:52,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:21:52,087 INFO L225 Difference]: With dead ends: 33 [2023-04-02 23:21:52,087 INFO L226 Difference]: Without dead ends: 31 [2023-04-02 23:21:52,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:21:52,088 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:21:52,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 57 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:21:52,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-02 23:21:52,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2023-04-02 23:21:52,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 23:21:52,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-04-02 23:21:52,102 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 15 [2023-04-02 23:21:52,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:21:52,102 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-04-02 23:21:52,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 23:21:52,102 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-04-02 23:21:52,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 23:21:52,103 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:21:52,103 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:21:52,109 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 23:21:52,308 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 23:21:52,309 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:21:52,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:21:52,309 INFO L85 PathProgramCache]: Analyzing trace with hash 414092736, now seen corresponding path program 1 times [2023-04-02 23:21:52,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:21:52,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104486687] [2023-04-02 23:21:52,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:52,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:21:52,321 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:21:52,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1104477762] [2023-04-02 23:21:52,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:52,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:21:52,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:21:52,323 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 23:21:52,326 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 23:21:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:21:52,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-02 23:21:52,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:21:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:21:52,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:21:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:21:52,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:21:52,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104486687] [2023-04-02 23:21:52,806 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:21:52,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104477762] [2023-04-02 23:21:52,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104477762] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:21:52,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2062925862] [2023-04-02 23:21:52,831 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 23:21:52,831 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:21:52,834 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:21:52,838 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:21:52,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:21:52,934 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:21:53,176 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 23:21:53,184 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 23:21:53,206 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:21:53,215 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:21:53,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2062925862] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:21:53,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:21:53,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [11, 7] total 29 [2023-04-02 23:21:53,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218609395] [2023-04-02 23:21:53,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:21:53,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 23:21:53,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:21:53,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 23:21:53,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2023-04-02 23:21:53,714 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 16 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 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 23:21:54,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:21:54,456 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2023-04-02 23:21:54,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 23:21:54,457 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 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) Word has length 21 [2023-04-02 23:21:54,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:21:54,458 INFO L225 Difference]: With dead ends: 37 [2023-04-02 23:21:54,458 INFO L226 Difference]: Without dead ends: 29 [2023-04-02 23:21:54,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 23:21:54,459 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:21:54,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 18 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:21:54,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-02 23:21:54,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-04-02 23:21:54,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 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) [2023-04-02 23:21:54,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-04-02 23:21:54,469 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 21 [2023-04-02 23:21:54,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:21:54,469 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-04-02 23:21:54,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 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 23:21:54,470 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-04-02 23:21:54,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 23:21:54,471 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:21:54,472 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 23:21:54,477 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 23:21:54,677 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 23:21:54,677 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:21:54,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:21:54,677 INFO L85 PathProgramCache]: Analyzing trace with hash 388362465, now seen corresponding path program 1 times [2023-04-02 23:21:54,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:21:54,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31344583] [2023-04-02 23:21:54,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:54,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:21:54,689 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:21:54,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2733260] [2023-04-02 23:21:54,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:54,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:21:54,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:21:54,710 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 23:21:54,713 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 23:21:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:21:54,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 23:21:54,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:21:54,825 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 23:21:54,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:21:54,892 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 23:21:54,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:21:54,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31344583] [2023-04-02 23:21:54,893 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:21:54,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2733260] [2023-04-02 23:21:54,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2733260] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:21:54,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [185052605] [2023-04-02 23:21:54,895 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 23:21:54,895 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:21:54,895 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:21:54,895 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:21:54,895 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:21:54,931 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:21:57,154 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:21:57,157 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 23:21:57,162 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:21:57,165 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:21:57,805 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '833#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:21:57,805 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:21:57,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:21:57,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-02 23:21:57,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846037422] [2023-04-02 23:21:57,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:21:57,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:21:57,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:21:57,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:21:57,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2023-04-02 23:21:57,808 INFO L87 Difference]: Start difference. First operand 29 states and 32 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 23:21:57,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:21:57,901 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2023-04-02 23:21:57,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 23:21:57,901 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 23:21:57,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:21:57,902 INFO L225 Difference]: With dead ends: 63 [2023-04-02 23:21:57,902 INFO L226 Difference]: Without dead ends: 55 [2023-04-02 23:21:57,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2023-04-02 23:21:57,905 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:21:57,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 85 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:21:57,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-04-02 23:21:57,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2023-04-02 23:21:57,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-02 23:21:57,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2023-04-02 23:21:57,923 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 23 [2023-04-02 23:21:57,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:21:57,923 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2023-04-02 23:21:57,923 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 23:21:57,923 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2023-04-02 23:21:57,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 23:21:57,924 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:21:57,924 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 23:21:57,935 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 23:21:58,130 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 23:21:58,130 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:21:58,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:21:58,130 INFO L85 PathProgramCache]: Analyzing trace with hash 390149925, now seen corresponding path program 1 times [2023-04-02 23:21:58,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:21:58,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941611188] [2023-04-02 23:21:58,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:58,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:21:58,151 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:21:58,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [550905549] [2023-04-02 23:21:58,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:21:58,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:21:58,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:21:58,153 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 23:21:58,157 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 23:21:58,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:21:58,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-02 23:21:58,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:21:59,007 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 23:21:59,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:21:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:21:59,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:21:59,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941611188] [2023-04-02 23:21:59,916 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:21:59,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550905549] [2023-04-02 23:21:59,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550905549] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:21:59,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [555292953] [2023-04-02 23:21:59,918 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 23:21:59,918 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:21:59,919 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:21:59,919 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:21:59,919 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:21:59,937 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:22:01,463 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 82 for LOIs [2023-04-02 23:22:01,592 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 23:22:01,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:22:01,598 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:22:02,746 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1171#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~y~0_BEFORE_CALL_40 Int) (v_main_~a~0_BEFORE_CALL_27 Int) (v_main_~q~0_BEFORE_CALL_29 Int) (v_main_~p~0_BEFORE_CALL_28 Int) (|v_old(~counter~0)_BEFORE_CALL_31| Int) (v_main_~b~0_BEFORE_CALL_28 Int) (v_main_~x~0_BEFORE_CALL_37 Int)) (and (not (= (+ v_main_~q~0_BEFORE_CALL_29 (* v_main_~a~0_BEFORE_CALL_27 v_main_~p~0_BEFORE_CALL_28 v_main_~b~0_BEFORE_CALL_28)) (* v_main_~y~0_BEFORE_CALL_40 v_main_~x~0_BEFORE_CALL_37))) (exists ((|v_main_#t~post6_22| Int)) (and (< |v_main_#t~post6_22| 5) (or (and (<= 1 |#StackHeapBarrier|) (= v_main_~a~0_BEFORE_CALL_27 v_main_~x~0_BEFORE_CALL_37) (= |v_old(~counter~0)_BEFORE_CALL_31| 0) (= v_main_~y~0_BEFORE_CALL_40 v_main_~b~0_BEFORE_CALL_28) (<= 0 (+ v_main_~x~0_BEFORE_CALL_37 2147483648)) (<= v_main_~y~0_BEFORE_CALL_40 2147483647) (= |#NULL.offset| 0) (<= 1 v_main_~y~0_BEFORE_CALL_40) (= v_main_~q~0_BEFORE_CALL_29 0) (= ~counter~0 1) (<= v_main_~x~0_BEFORE_CALL_37 2147483647) (= |v_main_#t~post6_22| 0) (= v_main_~p~0_BEFORE_CALL_28 1) (= |#NULL.base| 0)) (and (<= v_main_~y~0_BEFORE_CALL_40 (+ |#StackHeapBarrier| 2147483646)) (<= 1 |v_main_#t~post6_22|) (<= 1 |#StackHeapBarrier|) (<= v_main_~x~0_BEFORE_CALL_37 (+ v_main_~y~0_BEFORE_CALL_40 2147483646)) (<= v_main_~x~0_BEFORE_CALL_37 (+ |#StackHeapBarrier| 2147483646)) (= |v_old(~counter~0)_BEFORE_CALL_31| 0) (<= 0 (+ v_main_~x~0_BEFORE_CALL_37 2147483648)) (<= 0 (+ 2147483647 v_main_~y~0_BEFORE_CALL_40 v_main_~x~0_BEFORE_CALL_37)) (<= v_main_~y~0_BEFORE_CALL_40 2147483647) (<= (+ v_main_~y~0_BEFORE_CALL_40 v_main_~x~0_BEFORE_CALL_37) 4294967294) (<= 2 (+ |v_main_#t~post6_22| v_main_~y~0_BEFORE_CALL_40)) (<= v_main_~x~0_BEFORE_CALL_37 (+ |v_main_#t~post6_22| 2147483646)) (<= 0 (+ 2147483647 |v_main_#t~post6_22| v_main_~x~0_BEFORE_CALL_37)) (<= v_main_~y~0_BEFORE_CALL_40 (+ |v_main_#t~post6_22| 2147483646)) (<= 2 (+ |v_main_#t~post6_22| |#StackHeapBarrier|)) (<= v_main_~y~0_BEFORE_CALL_40 (+ 4294967295 v_main_~x~0_BEFORE_CALL_37)) (= ~counter~0 (+ |v_main_#t~post6_22| 1)) (= |#NULL.offset| 0) (<= 1 v_main_~y~0_BEFORE_CALL_40) (<= v_main_~x~0_BEFORE_CALL_37 2147483647) (<= 0 (+ 2147483647 |#StackHeapBarrier| v_main_~x~0_BEFORE_CALL_37)) (<= 2 (+ v_main_~y~0_BEFORE_CALL_40 |#StackHeapBarrier|)) (= |#NULL.base| 0))))))))' at error location [2023-04-02 23:22:02,746 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:22:02,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:22:02,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2023-04-02 23:22:02,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238716779] [2023-04-02 23:22:02,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:22:02,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 23:22:02,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:22:02,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 23:22:02,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2023-04-02 23:22:02,748 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 23:22:03,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:22:03,293 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2023-04-02 23:22:03,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 23:22:03,297 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 23 [2023-04-02 23:22:03,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:22:03,298 INFO L225 Difference]: With dead ends: 65 [2023-04-02 23:22:03,298 INFO L226 Difference]: Without dead ends: 63 [2023-04-02 23:22:03,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 23:22:03,300 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 23:22:03,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 89 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 23:22:03,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-04-02 23:22:03,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2023-04-02 23:22:03,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 23:22:03,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2023-04-02 23:22:03,314 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 23 [2023-04-02 23:22:03,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:22:03,314 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2023-04-02 23:22:03,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 23:22:03,315 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2023-04-02 23:22:03,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 23:22:03,315 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:22:03,315 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 23:22:03,323 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 23:22:03,516 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 23:22:03,516 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:22:03,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:22:03,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1994416277, now seen corresponding path program 1 times [2023-04-02 23:22:03,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:22:03,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082023606] [2023-04-02 23:22:03,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:03,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:22:03,526 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:22:03,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087365577] [2023-04-02 23:22:03,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:03,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:22:03,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:22:03,527 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 23:22:03,531 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 23:22:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:22:03,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 23:22:03,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:22:03,610 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 23:22:03,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:22:03,685 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 23:22:03,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:22:03,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082023606] [2023-04-02 23:22:03,685 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:22:03,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087365577] [2023-04-02 23:22:03,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087365577] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:22:03,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1460218710] [2023-04-02 23:22:03,687 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 23:22:03,687 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:22:03,688 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:22:03,688 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:22:03,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:22:03,705 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:22:04,928 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:22:04,930 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 23:22:04,933 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:22:04,936 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:22:05,561 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1542#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:22:05,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:22:05,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:22:05,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-04-02 23:22:05,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543357207] [2023-04-02 23:22:05,561 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:22:05,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 23:22:05,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:22:05,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 23:22:05,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2023-04-02 23:22:05,563 INFO L87 Difference]: Start difference. First operand 51 states and 55 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 23:22:05,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:22:05,871 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2023-04-02 23:22:05,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 23:22:05,871 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 23:22:05,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:22:05,873 INFO L225 Difference]: With dead ends: 58 [2023-04-02 23:22:05,873 INFO L226 Difference]: Without dead ends: 56 [2023-04-02 23:22:05,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2023-04-02 23:22:05,874 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:22:05,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 109 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 23:22:05,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-04-02 23:22:05,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-04-02 23:22:05,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 23:22:05,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2023-04-02 23:22:05,886 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 29 [2023-04-02 23:22:05,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:22:05,886 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2023-04-02 23:22:05,886 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 23:22:05,886 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2023-04-02 23:22:05,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-02 23:22:05,887 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:22:05,887 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:22:05,893 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 23:22:06,093 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 23:22:06,093 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:22:06,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:22:06,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1888543631, now seen corresponding path program 1 times [2023-04-02 23:22:06,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:22:06,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166268748] [2023-04-02 23:22:06,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:06,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:22:06,102 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:22:06,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [339349921] [2023-04-02 23:22:06,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:06,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:22:06,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:22:06,104 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 23:22:06,106 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 23:22:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:22:06,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 23:22:06,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:22:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 23:22:06,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:22:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:22:06,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:22:06,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166268748] [2023-04-02 23:22:06,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:22:06,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339349921] [2023-04-02 23:22:06,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339349921] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 23:22:06,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:22:06,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2023-04-02 23:22:06,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138298768] [2023-04-02 23:22:06,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:22:06,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:22:06,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:22:06,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:22:06,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:22:06,230 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 23:22:06,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:22:06,266 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2023-04-02 23:22:06,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:22:06,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2023-04-02 23:22:06,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:22:06,267 INFO L225 Difference]: With dead ends: 63 [2023-04-02 23:22:06,267 INFO L226 Difference]: Without dead ends: 51 [2023-04-02 23:22:06,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:22:06,268 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:22:06,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 72 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:22:06,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-04-02 23:22:06,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-04-02 23:22:06,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 23:22:06,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2023-04-02 23:22:06,278 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 34 [2023-04-02 23:22:06,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:22:06,278 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2023-04-02 23:22:06,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 23:22:06,279 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2023-04-02 23:22:06,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 23:22:06,280 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:22:06,280 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 23:22:06,291 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 23:22:06,485 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 23:22:06,486 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:22:06,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:22:06,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1927977122, now seen corresponding path program 2 times [2023-04-02 23:22:06,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:22:06,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352109466] [2023-04-02 23:22:06,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:06,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:22:06,497 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:22:06,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013764124] [2023-04-02 23:22:06,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 23:22:06,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:22:06,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:22:06,499 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 23:22:06,501 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 23:22:06,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-02 23:22:06,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:22:06,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 23:22:06,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:22:06,637 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 23:22:06,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:22:06,696 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 23:22:06,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:22:06,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352109466] [2023-04-02 23:22:06,696 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:22:06,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013764124] [2023-04-02 23:22:06,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013764124] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:22:06,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [108946202] [2023-04-02 23:22:06,698 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 23:22:06,698 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:22:06,699 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:22:06,699 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:22:06,699 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:22:06,716 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:22:08,173 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:22:08,176 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 23:22:08,179 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:22:08,184 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:22:08,682 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2382#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:22:08,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:22:08,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:22:08,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2023-04-02 23:22:08,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134449718] [2023-04-02 23:22:08,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:22:08,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:22:08,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:22:08,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:22:08,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2023-04-02 23:22:08,684 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 7 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-02 23:22:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:22:08,764 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2023-04-02 23:22:08,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 23:22:08,764 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 7 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) Word has length 47 [2023-04-02 23:22:08,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:22:08,765 INFO L225 Difference]: With dead ends: 67 [2023-04-02 23:22:08,765 INFO L226 Difference]: Without dead ends: 59 [2023-04-02 23:22:08,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 111 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2023-04-02 23:22:08,766 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:22:08,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:22:08,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-04-02 23:22:08,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-04-02 23:22:08,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 40 states have (on average 1.05) internal successors, (42), 41 states have internal predecessors, (42), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 23:22:08,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2023-04-02 23:22:08,777 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 47 [2023-04-02 23:22:08,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:22:08,777 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2023-04-02 23:22:08,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 7 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-02 23:22:08,777 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2023-04-02 23:22:08,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-02 23:22:08,778 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:22:08,778 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:22:08,788 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 23:22:08,984 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 23:22:08,984 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:22:08,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:22:08,985 INFO L85 PathProgramCache]: Analyzing trace with hash -211903859, now seen corresponding path program 3 times [2023-04-02 23:22:08,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:22:08,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345158277] [2023-04-02 23:22:08,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:08,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:22:08,994 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:22:08,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1391590542] [2023-04-02 23:22:08,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 23:22:08,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:22:08,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:22:08,996 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 23:22:09,009 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 23:22:09,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 23:22:09,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-04-02 23:22:09,087 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-02 23:22:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-02 23:22:09,189 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-02 23:22:09,189 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-02 23:22:09,190 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 23:22:09,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 23:22:09,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 23:22:09,400 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:22:09,403 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 23:22:09,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 11:22:09 BoogieIcfgContainer [2023-04-02 23:22:09,431 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 23:22:09,431 INFO L158 Benchmark]: Toolchain (without parser) took 19376.29ms. Allocated memory was 276.8MB in the beginning and 627.0MB in the end (delta: 350.2MB). Free memory was 231.8MB in the beginning and 491.0MB in the end (delta: -259.2MB). Peak memory consumption was 92.3MB. Max. memory is 8.0GB. [2023-04-02 23:22:09,431 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 201.3MB. Free memory is still 147.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 23:22:09,432 INFO L158 Benchmark]: CACSL2BoogieTranslator took 228.79ms. Allocated memory is still 276.8MB. Free memory was 231.5MB in the beginning and 221.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-02 23:22:09,432 INFO L158 Benchmark]: Boogie Preprocessor took 24.19ms. Allocated memory is still 276.8MB. Free memory was 220.6MB in the beginning and 219.2MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-02 23:22:09,432 INFO L158 Benchmark]: RCFGBuilder took 438.30ms. Allocated memory is still 276.8MB. Free memory was 219.2MB in the beginning and 201.0MB in the end (delta: 18.2MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2023-04-02 23:22:09,432 INFO L158 Benchmark]: TraceAbstraction took 18679.04ms. Allocated memory was 276.8MB in the beginning and 627.0MB in the end (delta: 350.2MB). Free memory was 200.3MB in the beginning and 491.0MB in the end (delta: -290.6MB). Peak memory consumption was 60.8MB. Max. memory is 8.0GB. [2023-04-02 23:22:09,433 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 201.3MB. Free memory is still 147.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 228.79ms. Allocated memory is still 276.8MB. Free memory was 231.5MB in the beginning and 221.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.19ms. Allocated memory is still 276.8MB. Free memory was 220.6MB in the beginning and 219.2MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 438.30ms. Allocated memory is still 276.8MB. Free memory was 219.2MB in the beginning and 201.0MB in the end (delta: 18.2MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * TraceAbstraction took 18679.04ms. Allocated memory was 276.8MB in the beginning and 627.0MB in the end (delta: 350.2MB). Free memory was 200.3MB in the beginning and 491.0MB in the end (delta: -290.6MB). Peak memory consumption was 60.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) [L26] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=14, y=14] [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 VAL [\old(counter)=0, a=14, b=14, counter=0, p=1, q=0, x=14, y=14] [L33] EXPR counter++ VAL [\old(counter)=0, a=14, b=14, counter++=0, counter=1, p=1, q=0, x=14, y=14] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(counter)=0, a=14, b=14, counter=1, p=1, q=0, x=14, y=14] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [\old(counter)=0, a=7, b=7, counter=1, p=4, q=0, x=14, y=14] [L33] EXPR counter++ VAL [\old(counter)=0, a=7, b=7, counter++=1, counter=2, p=4, q=0, x=14, y=14] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(counter)=0, a=7, b=7, counter=2, p=4, q=0, x=14, y=14] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND FALSE !(a % 2 == 1 && b % 2 == 0) [L46] COND FALSE !(a % 2 == 0 && b % 2 == 1) [L50] a = a - 1 [L51] b = b - 1 [L52] q = q + (a + b + 1) * p VAL [\old(counter)=0, a=6, b=6, counter=2, p=4, q=52, x=14, y=14] [L33] EXPR counter++ VAL [\old(counter)=0, a=6, b=6, counter++=2, counter=3, p=4, q=52, x=14, y=14] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(counter)=0, a=6, b=6, counter=3, p=4, q=52, x=14, y=14] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [\old(counter)=0, a=3, b=3, counter=3, p=16, q=52, x=14, y=14] [L33] EXPR counter++ VAL [\old(counter)=0, a=3, b=3, counter++=3, counter=4, p=16, q=52, x=14, y=14] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(counter)=0, a=3, b=3, counter=4, p=16, q=52, x=14, y=14] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND FALSE !(a % 2 == 1 && b % 2 == 0) [L46] COND FALSE !(a % 2 == 0 && b % 2 == 1) [L50] a = a - 1 [L51] b = b - 1 [L52] q = q + (a + b + 1) * p VAL [\old(counter)=0, a=2, b=2, counter=4, p=16, q=132, x=14, y=14] [L33] EXPR counter++ VAL [\old(counter)=0, a=2, b=2, counter++=4, counter=5, p=16, q=132, x=14, y=14] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(counter)=0, a=2, b=2, counter=5, p=16, q=132, x=14, y=14] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [\old(counter)=0, a=1, b=1, counter=5, p=64, q=132, x=14, y=14] [L33] EXPR counter++ VAL [\old(counter)=0, a=1, b=1, counter++=5, counter=6, p=64, q=132, x=14, y=14] [L33] COND FALSE !(counter++<5) [L56] CALL __VERIFIER_assert(q == (long long) x * y) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L12] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L14] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 18.6s, OverallIterations: 10, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 97 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 91 mSDsluCounter, 570 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 411 mSDsCounter, 32 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 584 IncrementalHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 32 mSolverCounterUnsat, 159 mSDtfsCounter, 584 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 555 GetRequests, 391 SyntacticMatches, 9 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 4.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=9, InterpolantAutomatonStates: 73, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 19 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 290 NumberOfCodeBlocks, 290 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 383 ConstructedInterpolants, 2 QuantifiedInterpolants, 1351 SizeOfPredicates, 40 NumberOfNonLiveVariables, 909 ConjunctsInSsa, 113 ConjunctsInUnsatCore, 15 InterpolantComputations, 4 PerfectInterpolantSequences, 110/218 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.4s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 5, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 19, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 16, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 11, TOOLS_POST_CALL_TIME: 0.1s, TOOLS_POST_RETURN_APPLICATIONS: 6, TOOLS_POST_RETURN_TIME: 0.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 33, TOOLS_QUANTIFIERELIM_TIME: 0.3s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 56, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 7, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 19, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 6, CALL_SUMMARIZER_CACHE_MISSES: 3, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 134, DAG_COMPRESSION_RETAINED_NODES: 64, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-04-02 23:22:09,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...